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  • DTracing TCP congestion control

    - by user12820842
    In a previous post, I showed how we can use DTrace to probe TCP receive and send window events. TCP receive and send windows are in effect both about flow-controlling how much data can be received - the receive window reflects how much data the local TCP is prepared to receive, while the send window simply reflects the size of the receive window of the peer TCP. Both then represent flow control as imposed by the receiver. However, consider that without the sender imposing flow control, and a slow link to a peer, TCP will simply fill up it's window with sent segments. Dealing with multiple TCP implementations filling their peer TCP's receive windows in this manner, busy intermediate routers may drop some of these segments, leading to timeout and retransmission, which may again lead to drops. This is termed congestion, and TCP has multiple congestion control strategies. We can see that in this example, we need to have some way of adjusting how much data we send depending on how quickly we receive acknowledgement - if we get ACKs quickly, we can safely send more segments, but if acknowledgements come slowly, we should proceed with more caution. More generally, we need to implement flow control on the send side also. Slow Start and Congestion Avoidance From RFC2581, let's examine the relevant variables: "The congestion window (cwnd) is a sender-side limit on the amount of data the sender can transmit into the network before receiving an acknowledgment (ACK). Another state variable, the slow start threshold (ssthresh), is used to determine whether the slow start or congestion avoidance algorithm is used to control data transmission" Slow start is used to probe the network's ability to handle transmission bursts both when a connection is first created and when retransmission timers fire. The latter case is important, as the fact that we have effectively lost TCP data acts as a motivator for re-probing how much data the network can handle from the sending TCP. The congestion window (cwnd) is initialized to a relatively small value, generally a low multiple of the sending maximum segment size. When slow start kicks in, we will only send that number of bytes before waiting for acknowledgement. When acknowledgements are received, the congestion window is increased in size until cwnd reaches the slow start threshold ssthresh value. For most congestion control algorithms the window increases exponentially under slow start, assuming we receive acknowledgements. We send 1 segment, receive an ACK, increase the cwnd by 1 MSS to 2*MSS, send 2 segments, receive 2 ACKs, increase the cwnd by 2*MSS to 4*MSS, send 4 segments etc. When the congestion window exceeds the slow start threshold, congestion avoidance is used instead of slow start. During congestion avoidance, the congestion window is generally updated by one MSS for each round-trip-time as opposed to each ACK, and so cwnd growth is linear instead of exponential (we may receive multiple ACKs within a single RTT). This continues until congestion is detected. If a retransmit timer fires, congestion is assumed and the ssthresh value is reset. It is reset to a fraction of the number of bytes outstanding (unacknowledged) in the network. At the same time the congestion window is reset to a single max segment size. Thus, we initiate slow start until we start receiving acknowledgements again, at which point we can eventually flip over to congestion avoidance when cwnd ssthresh. Congestion control algorithms differ most in how they handle the other indication of congestion - duplicate ACKs. A duplicate ACK is a strong indication that data has been lost, since they often come from a receiver explicitly asking for a retransmission. In some cases, a duplicate ACK may be generated at the receiver as a result of packets arriving out-of-order, so it is sensible to wait for multiple duplicate ACKs before assuming packet loss rather than out-of-order delivery. This is termed fast retransmit (i.e. retransmit without waiting for the retransmission timer to expire). Note that on Oracle Solaris 11, the congestion control method used can be customized. See here for more details. In general, 3 or more duplicate ACKs indicate packet loss and should trigger fast retransmit . It's best not to revert to slow start in this case, as the fact that the receiver knew it was missing data suggests it has received data with a higher sequence number, so we know traffic is still flowing. Falling back to slow start would be excessive therefore, so fast recovery is used instead. Observing slow start and congestion avoidance The following script counts TCP segments sent when under slow start (cwnd ssthresh). #!/usr/sbin/dtrace -s #pragma D option quiet tcp:::connect-request / start[args[1]-cs_cid] == 0/ { start[args[1]-cs_cid] = 1; } tcp:::send / start[args[1]-cs_cid] == 1 && args[3]-tcps_cwnd tcps_cwnd_ssthresh / { @c["Slow start", args[2]-ip_daddr, args[4]-tcp_dport] = count(); } tcp:::send / start[args[1]-cs_cid] == 1 && args[3]-tcps_cwnd args[3]-tcps_cwnd_ssthresh / { @c["Congestion avoidance", args[2]-ip_daddr, args[4]-tcp_dport] = count(); } As we can see the script only works on connections initiated since it is started (using the start[] associative array with the connection ID as index to set whether it's a new connection (start[cid] = 1). From there we simply differentiate send events where cwnd ssthresh (congestion avoidance). Here's the output taken when I accessed a YouTube video (where rport is 80) and from an FTP session where I put a large file onto a remote system. # dtrace -s tcp_slow_start.d ^C ALGORITHM RADDR RPORT #SEG Slow start 10.153.125.222 20 6 Slow start 138.3.237.7 80 14 Slow start 10.153.125.222 21 18 Congestion avoidance 10.153.125.222 20 1164 We see that in the case of the YouTube video, slow start was exclusively used. Most of the segments we sent in that case were likely ACKs. Compare this case - where 14 segments were sent using slow start - to the FTP case, where only 6 segments were sent before we switched to congestion avoidance for 1164 segments. In the case of the FTP session, the FTP data on port 20 was predominantly sent with congestion avoidance in operation, while the FTP session relied exclusively on slow start. For the default congestion control algorithm - "newreno" - on Solaris 11, slow start will increase the cwnd by 1 MSS for every acknowledgement received, and by 1 MSS for each RTT in congestion avoidance mode. Different pluggable congestion control algorithms operate slightly differently. For example "highspeed" will update the slow start cwnd by the number of bytes ACKed rather than the MSS. And to finish, here's a neat oneliner to visually display the distribution of congestion window values for all TCP connections to a given remote port using a quantization. In this example, only port 80 is in use and we see the majority of cwnd values for that port are in the 4096-8191 range. # dtrace -n 'tcp:::send { @q[args[4]-tcp_dport] = quantize(args[3]-tcps_cwnd); }' dtrace: description 'tcp:::send ' matched 10 probes ^C 80 value ------------- Distribution ------------- count -1 | 0 0 |@@@@@@ 5 1 | 0 2 | 0 4 | 0 8 | 0 16 | 0 32 | 0 64 | 0 128 | 0 256 | 0 512 | 0 1024 | 0 2048 |@@@@@@@@@ 8 4096 |@@@@@@@@@@@@@@@@@@@@@@@@@@ 23 8192 | 0

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  • Who could ask for more with LESS CSS? (Part 3 of 3&ndash;Clrizr)

    - by ToString(theory);
    Welcome back!  In the first two posts in this series, I covered some of the awesome features in CSS precompilers such as SASS and LESS, as well as how to get an initial project setup up and running in ASP.Net MVC 4. In this post, I will cover an actual advanced example of using LESS in a project, and show some of the great productivity features we gain from its usage. Introduction In the first post, I mentioned two subjects that I will be using in this example – constants, and color functions.  I’ve always enjoyed using online color scheme utilities such as Adobe Kuler or Color Scheme Designer to come up with a scheme based off of one primary color.  Using these tools, and requesting a complementary scheme you can get a couple of shades of your primary color, and a couple of shades of a complementary/accent color to display. Because there is no way in regular css to do color operations or store variables, there was no way to accomplish something like defining a primary color, and have a site theme cascade off of that.  However with tools such as LESS, that impossibility becomes a reality!  So, if you haven’t guessed it by now, this post is on the creation of a plugin/module/less file to drop into your project, plugin one color, and have your primary theme cascade from it.  I only went through the trouble of creating a module for getting Complementary colors.  However, it wouldn’t be too much trouble to go through other options such as Triad or Monochromatic to get a module that you could use off of that. Step 1 – Analysis I decided to mimic Adobe Kuler’s Complementary theme algorithm as I liked its simplicity and aesthetics.  Color Scheme Designer is great, but I do believe it can give you too many color options, which can lead to chaos and overload.  The first thing I had to check was if the complementary values for the color schemes were actually hues rotated by 180 degrees at all times – they aren’t.  Apparently Adobe applies some variance to the complementary colors to get colors that are actually more aesthetically appealing to users.  So, I opened up Excel and began to plot complementary hues based on rotation in increments of 10: Long story short, I completed the same calculations for Hue, Saturation, and Lightness.  For Hue, I only had to record the Complementary hue values, however for saturation and lightness, I had to record the values for ALL of the shades.  Since the functions were too complicated to put into LESS since they aren’t constant/linear, but rather interval functions, I instead opted to extrapolate the HSL values using the trendline function for each major interval, onto intervals of spacing 1. For example, using the hue extraction, I got the following values: Interval Function 0-60 60-140 140-270 270-360 Saturation and Lightness were much worse, but in the end, I finally had functions for all of the intervals, and then went the route of just grabbing each shades value in intervals of 1.  Step 2 – Mapping I declared variable names for each of these sections as something that shouldn’t ever conflict with a variable someone would define in their own file.  After I had each of the values, I extracted the values and put them into files of their own for hue variables, saturation variables, and lightness variables…  Example: /*HUE CONVERSIONS*/@clrizr-hue-source-0deg: 133.43;@clrizr-hue-source-1deg: 135.601;@clrizr-hue-source-2deg: 137.772;@clrizr-hue-source-3deg: 139.943;@clrizr-hue-source-4deg: 142.114;.../*SATURATION CONVERSIONS*/@clrizr-saturation-s2SV0px: 0;@clrizr-saturation-s2SV1px: 0;@clrizr-saturation-s2SV2px: 0;@clrizr-saturation-s2SV3px: 0;@clrizr-saturation-s2SV4px: 0;.../*LIGHTNESS CONVERSIONS*/@clrizr-lightness-s2LV0px: 30;@clrizr-lightness-s2LV1px: 31;@clrizr-lightness-s2LV2px: 32;@clrizr-lightness-s2LV3px: 33;@clrizr-lightness-s2LV4px: 34;...   In the end, I have 973 lines of mapping/conversion from source HSL to shade HSL for two extra primary shades, and two complementary shades. The last bit of the work was the file to compose each of the shades from these mappings. Step 3 – Clrizr Mapper The final step was the hardest to overcome as I was still trying to understand LESS to its fullest extent.  Imports As mentioned previously, I had separated the HSL mappings into different files, so the first necessary step is to import those for use into the Clrizr plugin: @import url("hue.less");@import url("saturation.less");@import url("lightness.less"); Extract Component Values For Each Shade Next, I extracted the necessary information for each shade HSL before shade composition: @clrizr-input-saturation: 1px+floor(saturation(@clrizr-input))-1;@clrizr-input-lightness: 1px+floor(lightness(@clrizr-input))-1; @clrizr-complementary-hue: formatstring("clrizr-hue-source-{0}", ceil(hue(@clrizr-input))); @clrizr-primary-2-saturation: formatstring("clrizr-saturation-s2SV{0}",@clrizr-input-saturation);@clrizr-primary-1-saturation: formatstring("clrizr-saturation-s1SV{0}",@clrizr-input-saturation);@clrizr-complementary-1-saturation: formatstring("clrizr-saturation-c1SV{0}",@clrizr-input-saturation); @clrizr-primary-2-lightness: formatstring("clrizr-lightness-s2LV{0}",@clrizr-input-lightness);@clrizr-primary-1-lightness: formatstring("clrizr-lightness-s1LV{0}",@clrizr-input-lightness);@clrizr-complementary-1-lightness: formatstring("clrizr-lightness-c1LV{0}",@clrizr-input-lightness); Here, you can see a couple of odd things…  On the first line, I am using operations to add units to the saturation and lightness.  This is due to some limitations in the operations that would give me saturation or lightness in %, which can’t be in a variable name.  So, I use first add 1px to it, which casts the result of the following functions as px instead of %, and then at the end, I remove that pixel.  You can also see here the formatstring method which is exactly what it sounds like – something like String.Format(string str, params object[] obj). Get Primary & Complementary Shades Now that I have components for each of the different shades, I can now compose them into each of their pieces.  For this, I use the @@ operator which will look for a variable with the name specified in a string, and then call that variable: @clrizr-primary-2: hsl(hue(@clrizr-input), @@clrizr-primary-2-saturation, @@clrizr-primary-2-lightness);@clrizr-primary-1: hsl(hue(@clrizr-input), @@clrizr-primary-1-saturation, @@clrizr-primary-1-lightness);@clrizr-primary: @clrizr-input;@clrizr-complementary-1: hsl(@@clrizr-complementary-hue, @@clrizr-complementary-1-saturation, @@clrizr-complementary-1-lightness);@clrizr-complementary-2: hsl(@@clrizr-complementary-hue, saturation(@clrizr-input), lightness(@clrizr-input)); That’s is it, for the most part.  These variables now hold the theme for the one input color – @clrizr-input.  However, I have one last addition… Perceptive Luminance Well, after I got the colors, I decided I wanted to also get the best font color that would go on top of it.  Black or white depending on light or dark color.  Now I couldn’t just go with checking the lightness, as that is half the story.  You see, the human eye doesn’t see ALL colors equally well but rather has more cells for interpreting green light compared to blue or red.  So, using the ratio, we can calculate the perceptive luminance of each of the shades, and get the font color that best matches it! @clrizr-perceptive-luminance-ps2: round(1 - ( (0.299 * red(@clrizr-primary-2) ) + ( 0.587 * green(@clrizr-primary-2) ) + (0.114 * blue(@clrizr-primary-2)))/255)*255;@clrizr-perceptive-luminance-ps1: round(1 - ( (0.299 * red(@clrizr-primary-1) ) + ( 0.587 * green(@clrizr-primary-1) ) + (0.114 * blue(@clrizr-primary-1)))/255)*255;@clrizr-perceptive-luminance-ps: round(1 - ( (0.299 * red(@clrizr-primary) ) + ( 0.587 * green(@clrizr-primary) ) + (0.114 * blue(@clrizr-primary)))/255)*255;@clrizr-perceptive-luminance-pc1: round(1 - ( (0.299 * red(@clrizr-complementary-1)) + ( 0.587 * green(@clrizr-complementary-1)) + (0.114 * blue(@clrizr-complementary-1)))/255)*255;@clrizr-perceptive-luminance-pc2: round(1 - ( (0.299 * red(@clrizr-complementary-2)) + ( 0.587 * green(@clrizr-complementary-2)) + (0.114 * blue(@clrizr-complementary-2)))/255)*255; @clrizr-col-font-on-primary-2: rgb(@clrizr-perceptive-luminance-ps2, @clrizr-perceptive-luminance-ps2, @clrizr-perceptive-luminance-ps2);@clrizr-col-font-on-primary-1: rgb(@clrizr-perceptive-luminance-ps1, @clrizr-perceptive-luminance-ps1, @clrizr-perceptive-luminance-ps1);@clrizr-col-font-on-primary: rgb(@clrizr-perceptive-luminance-ps, @clrizr-perceptive-luminance-ps, @clrizr-perceptive-luminance-ps);@clrizr-col-font-on-complementary-1: rgb(@clrizr-perceptive-luminance-pc1, @clrizr-perceptive-luminance-pc1, @clrizr-perceptive-luminance-pc1);@clrizr-col-font-on-complementary-2: rgb(@clrizr-perceptive-luminance-pc2, @clrizr-perceptive-luminance-pc2, @clrizr-perceptive-luminance-pc2); Conclusion That’s it!  I have posted a project on clrizr.codePlex.com for this, and included a testing page for you to test out how it works.  Feel free to use it in your own project, and if you have any questions, comments or suggestions, please feel free to leave them here as a comment, or on the contact page!

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  • CodePlex Daily Summary for Monday, September 03, 2012

    CodePlex Daily Summary for Monday, September 03, 2012Popular ReleasesMetodología General Ajustada - MGA: 03.01.03: Cambios Aury: Ajuste del margen del reporte. Visualización de la columna de Supuestos en la parte del módulo de Decisión. Cambios John: Integración de código con cambios enviados por Aury Niño. Generación de instaladores. Soporte técnico por correo electrónico y telefónico.Iveely Search Engine: Iveely Search Engine (0.2.0): ????ISE?0.1.0??,?????,ISE?0.2.0?????????,???????,????????20???follow?ISE,????,??ISE??????????,??????????,?????????,?????????0.2.0??????,??????????。 Iveely Search Engine ?0.2.0?????????“??????????”,??????,?????????,???????,???????????????????,????、????????????。???0.1.0????????????: 1. ??“????” ??。??????????,?????????,???????????????????。??:????????,????????????,??????????????????。??????。 2. ??“????”??。?0.1.0??????,???????,???????????????,?????????????,????????,?0.2.0?,???????...Thisismyusername's codeplex page.: HTML5 Mulititouch Fruit Ninja Proof of Concept: This is an example of how you could create a game such as Fruit Ninja using HTML5's multitouch capabilities. Sorry this example doesn't have great graphics. If I had my own webpage, I could store some graphics and upload the game there and it might look halfway decent, but since I'm only using a Codeplex page and most mobile devices can't open .zip files, the fruits are just circles. I hope you enjoy reading the source code anyway.GmailDefaultMaker: GmailDefaultMaker 3.0.0.2: Add QQ Mail BugfixSmart Data Access layer: Smart Data access Layer Ver 3: In this version support executing inline query is added. Check Documentation section for detail.TSQL Code Smells Finder: POC 1.01: Proof of concept 1.01 TSQLDomTest.ps1 and Errors.Txt are requiredConfuser: Confuser build 76542: This is a build of changeset 76542.Reactive State Machine: ReactiveStateMachine-beta: TouchStateMachine now supports Microsoft Surface 2.0 SDK. The TouchStateMachine is an extension to the Reactive State Machine. Reactive State Machine uses NuGet for dependency managementSharePoint Column & View Permission: SharePoint Column and View Permission v1.2: Version 1.2 of this project. If you will find any bugs please let me know at enti@zoznam.sk or post your findings in Issue TrackerMihmojsos OS: Mihmojsos OS 3 (Smart Rabbit): !Mihmojsos OS 3 Smart Rabbit Mihmojsos Smart Rabbit is now availableDotNetNuke Translator: 01.00.00 Beta: First release of the project.YNA: YNA 0.2 alpha: Wath's new since 0.1 alpha ? A lot of changes but there are the most interresting : StateManager is now better and faster Mouse events for all YnObjects (Sprites, Images, texts) A really big improvement for YnGroup Gamepad support And the news : Tiled Map support (need refactoring) Isometric tiled map support (need refactoring) Transition effect like "FadeIn" and "FadeOut" (YnTransition) Timers (YnTimer) Path management (YnPath, need more refactoring) Downloads All downloads...Audio Pitch & Shift: Audio Pitch And Shift 5.1.0.2: fixed several issues with streaming modeUrlPager: UrlPager 1.2: Fixed bug in which url parameters will lost after paging; ????????url???bug;Sofire Suite: Sofire v1.5.0.0: Sofire v1.5.0.0 ?? ???????? ?????: 1、?? 2、????EntLib.com????????: EntLib.com???????? v3.0: EntLib eCommerce Solution ???Microsoft .Net Framework?????????????????????。Coevery - Free CRM: Coevery 1.0.0.24: Add a sample database, and installation instructions.Math.NET Numerics: Math.NET Numerics v2.2.1: Major linear algebra rework since v2.1, now available on Codeplex as well (previous versions were only available via NuGet). Since v2.2.0: Student-T density more robust for very large degrees of freedom Sparse Kronecker product much more efficient (now leverages sparsity) Direct access to raw matrix storage implementations for advanced extensibility Now also separate package for signed core library with a strong name (we dropped strong names in v2.2.0) Also available as NuGet packages...Microsoft SQL Server Product Samples: Database: AdventureWorks Databases – 2012, 2008R2 and 2008: About this release This release consolidates AdventureWorks databases for SQL Server 2012, 2008R2 and 2008 versions to one page. Each zip file contains an mdf database file and ldf log file. This should make it easier to find and download AdventureWorks databases since all OLTP versions are on one page. There are no database schema changes. For each release of the product, there is a light-weight and full version of the AdventureWorks sample database. The light-weight version is denoted by ...Christoc's DotNetNuke Module Development Template: DotNetNuke Project Templates V1.1 for VS2012: This release is specifically for Visual Studio 2012 Support, distributed through the Visual Studio Extensions gallery at http://visualstudiogallery.msdn.microsoft.com/ After you build in Release mode the installable packages (source/install) can be found in the INSTALL folder now, within your module's folder, not the packages folder anymore Check out the blog post for all of the details about this release. http://www.dotnetnuke.com/Resources/Blogs/EntryId/3471/New-Visual-Studio-2012-Projec...New ProjectsBPVote4PPT: BPVote For PowerPointCosmo OS: La semplicità in un OSFinancial Analytic Tools: C#.Net Financial Analytic ToolsGeminiMVC: An Open Source CMS written in ASP.net MVC 4 with speed, extensibility, and ease-of-us in mind.JQuery SharePoint Autocomplete People Picker: This JQUery bundle provides an autocomplete people picker based on SharePoint profiles. It can be hosted on the SharePoint itself or on remote applications.Kerbal Space Program PartModule Library: This project is designed to add various functionalities to custom parts for the space program simulation game Kerbal Space Program.KeyboardRemapper: This tool to remaps keys in the keyboard. If you have more than one keyboard or an additional keypad, you can remap the keys of the each keyboard independentlyKHStudent: ??????Localized DataAnnotations with T4 templates: Simplified DataAnnotations localization using T4 templates.MfcLightToolkit: Supports development for small and simple MFC application. Provides asynchronous programming model like .NET, file download, easy control resizing, and so on.Müslüm ÖZTÜRK Code Lib: Test amaçli olusturulan projemdirPolska: Testproject in how a polish grammerprogram can look like.QueueLessApp: Here is the codeRusIS.CMS: aaaSGPS: Projeto de controle de produtos e serviçosStemmersNet: Stemmers pack for .Net FrameworkTrabajo Final de Ingenieria - Javier Vallejos: Tesis Final de la carrera de Ingenieria - Universidad Abierta Interamericana.TSQL Code Smells Finder: TSQL 'smells' findersXNA and Data Driven Design: This project includes links for XNA and Data Driven DesignXNA and System Testing: This project includes code for XNA and System TestingYUGI-AR Project: an open source project for yugioh based augmented reality???????? ? ?????????????: ???? ??????? ??????? ?????????????? ??????????? ?????????? ??? ? ????? ?????? ? ? ??? ??? ????? ? ??? ?????????? ????????????.

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  • e2fsck / resize2fs problems

    - by BlakBat
    I've got 6 drives (each 1.5T, all same model and firmware revision) that are part of a RAID5 array. The RAID5 makes a LVM volume group and a logical group. The latter contains only one ext3 partition. I've recently ran: e2fsck -f /dev/vg03/lv01 && resize2fs -M /dev/vg03/lv01 which exited without an error. Now when I try to mount /dev/vg03/lv01 I get: EXT3-fs error (device dm-0): ext3_check_descriptors: Block bitmap for group 30533 not in group (block 1000532368)! EXT3-fs: group descriptors corrupted! How do I get out of this predicament? This is all the info I can currently give you: fdisk -l /dev/sd[cdefgh] shows (correctly) that they are "Linux raid autodetect" but fdisk now shows: fdisk -l /dev/md0 Disk /dev/md0: 7501.5 GB, 7501495664640 bytes ... Disk identifier: 0x00000000 Disk /dev/md0 doesn't contain a valid partition table (instead of a LVM type partition) fdisk -l /dev/vg03/lv01 Disk /dev/vg03/lv01: 7501.5 GB, 7501491732480 bytes ... Disk identifier: 0x00000000 Disk /dev/vg03/lv01 doesn't contain a valid partition table (instead of a ext3 type partition) I've tried: e2fsck -fy /dev/vg03/lv01 e2fsck 1.41.12 (17-May-2010) e2fsck: Group descriptors look bad... trying backup blocks... Block bitmap for group 30533 is not in group. (block 1000532368) Relocate? yes Inode bitmap for group 30533 is not in group. (block 1000532369) Relocate? yes Pass 1: Checking inodes, blocks, and sizes Relocating group 30533's block bitmap to 1000524246... Error allocating 1 contiguous block(s) in block group 30533 for inode bitmap: Could not allocate block in ext2 filesystem e2fsck: aborted Extra information I can give you: cat /proc/mdstat Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] md0 : active (auto-read-only) raid5 sdg1[0] sdh1[5] sdf1[4] sde1[3] sdc1[2] sdd1[1] 7325679360 blocks level 5, 128k chunk, algorithm 2 [6/6] [UUUUUU] bitmap: 1/175 pages [4KB], 4096KB chunk unused devices: Lastly, all smartctl tests (short and extendend) showed no errors on any of the disks. Should I try to resize2fs to grow /dev/vg03/lv01 and redo a e2fsck ? Should I cfdisk /dev/md0 and /dev/vg03/lv01 back to their real types? Thanks in advance for all and any help. 2011-09-20 UPDATE I issued the following commands and was able to remount the partition, but by viewing the size (df) of before and after, it seems that 1Tb of data have gone missing. By checking the MD5SUMS (from an old backup) of some files with the "same" files from the remounted partition, some errors have been detected. Commands issued to remount the partition were: dumpe2fs /dev/vg03/lv01 Block count: 1000491435<br /> Block size: 4096<br /> tune2fs -O ^has_journal /dev/vg03/lv01 resize2fs -p /dev/vg03/lv01 dumpe2fs /dev/vg03/lv01 Block count: 1831418880<br /> Block size: 4096<br /> mount -o ro,noatime /dev/vg03/lv01 /mnt/raid OK... but files have been damaged / gone missing.

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  • Reconstructing the disk order in RAID 6 with 7 disks

    - by rkotulla
    a little background to this question first: I am running a RAID-6 within a QNAP TS869L external RAID/NAS system. I started with 5 disks of 3 TB each back in the day, and later added another 2 disks of 3TB to the RAID. The QNAP internals handled the growing and re-syncing etc, and everything seemd to be perfectly fine. About 2 weeks ago, I had one of the disks (disk #5, disk #2 has gone bad in the mean time) fail, and somehow (I have no idea why), also disks 1 and 2 got kicked out of the array. I replaced disk #5, but the RAID didn't start working again. After some calls to QNAP technical support, they re-created the array (using mdadm --create --force --assume-clean ...), but the resulting array couldn't find a filesystem, and I was kindly referred to contact a data recovery company that I can't afford. After some digging through old log files, resetting the disk to factory default, etc, I found a few errors that were made during this re-create - I wish I still had some of the original metadata, but unfortunately i don't (I definitely learned that lesson). I'm currently at the point where I know the correct chunk-size (64K), metadata-version (1.0; factory default was 0.9, but from what I read 0.9 doesn't handle disks over 2 TB, mine are 3 TB), and I now find the ext4 filesystem that should be on the disks. Only variable left to determine is the right disk order! I started using the description found in answer #4 of "Recover RAID 5 data after created new array instead of re-using" but am a little confused on what the order should be for a proper RAID-6. RAID-5 is pretty well documented in a number of places, but RAID-6 much less so. Also, does the layout, i.e. distribution of parity and data chunks across the disks, change after the growing of the array from 5 to 7 disks, or does the re-sync re-organize them in such a way a native 7-disk RAID-6 would have been? Thanks some more mdadm output that might be helpful: mdadm version: [~] # mdadm --version mdadm - v2.6.3 - 20th August 2007 mdadm details from one of the disks in the array: [~] # mdadm --examine /dev/sda3 /dev/sda3: Magic : a92b4efc Version : 1.0 Feature Map : 0x0 Array UUID : 1c1614a5:e3be2fbb:4af01271:947fe3aa Name : 0 Creation Time : Tue Jun 10 10:27:58 2014 Raid Level : raid6 Raid Devices : 7 Used Dev Size : 5857395112 (2793.02 GiB 2998.99 GB) Array Size : 29286975360 (13965.12 GiB 14994.93 GB) Used Size : 5857395072 (2793.02 GiB 2998.99 GB) Super Offset : 5857395368 sectors State : clean Device UUID : 7c572d8f:20c12727:7e88c888:c2c357af Update Time : Tue Jun 10 13:01:06 2014 Checksum : d275c82d - correct Events : 7036 Chunk Size : 64K Array Slot : 0 (0, 1, failed, 3, failed, 5, 6) Array State : Uu_u_uu 2 failed mdadm details for the array in the current disk-order (based on my best guess reconstructed from old log-files) [~] # mdadm --detail /dev/md0 /dev/md0: Version : 01.00.03 Creation Time : Tue Jun 10 10:27:58 2014 Raid Level : raid6 Array Size : 14643487680 (13965.12 GiB 14994.93 GB) Used Dev Size : 2928697536 (2793.02 GiB 2998.99 GB) Raid Devices : 7 Total Devices : 5 Preferred Minor : 0 Persistence : Superblock is persistent Update Time : Tue Jun 10 13:01:06 2014 State : clean, degraded Active Devices : 5 Working Devices : 5 Failed Devices : 0 Spare Devices : 0 Chunk Size : 64K Name : 0 UUID : 1c1614a5:e3be2fbb:4af01271:947fe3aa Events : 7036 Number Major Minor RaidDevice State 0 8 3 0 active sync /dev/sda3 1 8 19 1 active sync /dev/sdb3 2 0 0 2 removed 3 8 51 3 active sync /dev/sdd3 4 0 0 4 removed 5 8 99 5 active sync /dev/sdg3 6 8 83 6 active sync /dev/sdf3 output from /proc/mdstat (md8, md9, and md13 are internally used RAIDs holding swap, etc; the one I'm after is md0) [~] # more /proc/mdstat Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5] [raid4] [multipath] md0 : active raid6 sdf3[6] sdg3[5] sdd3[3] sdb3[1] sda3[0] 14643487680 blocks super 1.0 level 6, 64k chunk, algorithm 2 [7/5] [UU_U_UU] md8 : active raid1 sdg2[2](S) sdf2[3](S) sdd2[4](S) sdc2[5](S) sdb2[6](S) sda2[1] sde2[0] 530048 blocks [2/2] [UU] md13 : active raid1 sdg4[3] sdf4[4] sde4[5] sdd4[6] sdc4[2] sdb4[1] sda4[0] 458880 blocks [8/7] [UUUUUUU_] bitmap: 21/57 pages [84KB], 4KB chunk md9 : active raid1 sdg1[6] sdf1[5] sde1[4] sdd1[3] sdc1[2] sda1[0] sdb1[1] 530048 blocks [8/7] [UUUUUUU_] bitmap: 37/65 pages [148KB], 4KB chunk unused devices: <none>

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  • Different Not Automatically Implies Better

    - by Alois Kraus
    Originally posted on: http://geekswithblogs.net/akraus1/archive/2013/11/05/154556.aspxRecently I was digging deeper why some WCF hosted workflow application did consume quite a lot of memory although it did basically only load a xaml workflow. The first tool of choice is Process Explorer or even better Process Hacker (has more options and the best feature copy&paste does work). The three most important numbers of a process with regards to memory are Working Set, Private Working Set and Private Bytes. Working set is the currently consumed physical memory (parts can be shared between processes e.g. loaded dlls which are read only) Private Working Set is the physical memory needed by this process which is not shareable Private Bytes is the number of non shareable which is only visible in the current process (e.g. all new, malloc, VirtualAlloc calls do create private bytes) When you have a bigger workflow it can consume under 64 bit easily 500MB for a 1-2 MB xaml file. This does not look very scalable. Under 64 bit the issue is excessive private bytes consumption and not the managed heap. The picture is quite different for 32 bit which looks a bit strange but it seems that the hosted VB compiler is a lot less memory hungry under 32 bit. I did try to repro the issue with a medium sized xaml file (400KB) which does contain 1000 variables and 1000 if which can be represented by C# code like this: string Var1; string Var2; ... string Var1000; if (!String.IsNullOrEmpty(Var1) ) { Console.WriteLine(“Var1”); } if (!String.IsNullOrEmpty(Var2) ) { Console.WriteLine(“Var2”); } ....   Since WF is based on VB.NET expressions you are bound to the hosted VB.NET compiler which does result in (x64) 140 MB of private bytes which is ca. 140 KB for each if clause which is quite a lot if you think about the actually present functionality. But there is hope. .NET 4.5 does allow now C# expressions for WF which is a major step forward for all C# lovers. I did create some simple patcher to “cross compile” my xaml to C# expressions. Lets look at the result: C# Expressions VB Expressions x86 x86 On my home machine I have only 32 bit which gives you quite exactly half of the memory consumption under 64 bit. C# expressions are 10 times more memory hungry than VB.NET expressions! I wanted to do more with less memory but instead it did consume a magnitude more memory. That is surprising to say the least. The workflow does initialize in about the same time under x64 and x86 where the VB code does it in 2s whereas the C# version needs 18s. Also nearly ten times slower. That is a too high price to pay for any bigger sized xaml workflow to convert from VB.NET to C# expressions. If I do reduce the number of expressions to 500 then it does need 400MB which is about half of the memory. It seems that the cost per if does rise linear with the number of total expressions in a xaml workflow.  Expression Language Cost per IF Startup Time C# 1000 Ifs x64 1,5 MB 18s C# 500 Ifs x64 750 KB 9s VB 1000 Ifs x64 140 KB 2s VB 500 Ifs x64 70 KB 1s Now we can directly compare two MS implementations. It is clear that the VB.NET compiler uses the same underlying structure but it has much higher offset compared to the highly inefficient C# expression compiler. I have filed a connect bug here with a harsher wording about recent advances in memory consumption. The funniest thing is that one MS employee did give an Azure AppFabric demo around early 2011 which was so slow that he needed to investigate with xperf. He was after startup time and the call stacks with regards to VB.NET expression compilation were remarkably similar. In fact I only found this post by googling for parts of my call stacks. … “C# expressions will be coming soon to WF, and that will have different performance characteristics than VB” … What did he know Jan 2011 what I did no know until today? ;-). He knew that C# expression will come but that they will not be automatically have better footprint. It is about time to fix that. In its current state C# expressions are not usable for bigger workflows. That also explains the headline for today. You can cheat startup time by prestarting workflows so that the demo looks nice and snappy but it does hurt scalability a lot since you do need much more memory than necessary. I did find the stacks by enabling virtual allocation tracking within XPerf which is still the best tool out there. But first you need to look at your process to check where the memory is hiding: For the C# Expression compiler you do not need xperf. You can directly dump the managed heap and check with a profiler of your choice. But if the allocations are happening on the Private Data ( VirtualAlloc ) you can find it with xperf. There is a nice video on channel 9 explaining VirtualAlloc tracking it in greater detail. If your data allocations are on the Heap it does mean that the C/C++ runtime did create a heap for you where all malloc, new calls do allocate from it. You can enable heap tracing with xperf and full call stack support as well which is doable via xperf like it is shown also on channel 9. Or you can use WPRUI directly: To make “Heap Usage” it work you need to set for your executable the tracing flags (before you start it). For example devenv.exe HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\devenv.exe DWORD TracingFlags 1 Do not forget to disable it after you did complete profiling the process or it will impact the startup time quite a lot. You can with xperf attach directly to a running process and collect heap allocation information from a gone wild process. Very handy if you need to find out what a process was doing which has arrived in a funny state. “VirtualAlloc usage” does work without explicitly enabling stuff for a specific process and is always on machine wide. I had issues on my Windows 7 machines with the call stack collection and the latest Windows 8.1 Performance Toolkit. I was told that WPA from Windows 8.0 should work fine but I do not want to downgrade.

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  • linux raid 1: right after replacing and syncing one drive, the other disk fails - understanding what is going on with mdstat/mdadm

    - by devicerandom
    We have an old RAID 1 Linux server (Ubuntu Lucid 10.04), with four partitions. A few days ago /dev/sdb failed, and today we noticed /dev/sda had pre-failure ominous SMART signs (~4000 reallocated sector count). We replaced /dev/sdb this morning and rebuilt the RAID on the new drive, following this guide: http://www.howtoforge.com/replacing_hard_disks_in_a_raid1_array Everything went smooth until the very end. When it looked like it was finishing to synchronize the last partition, the other old one failed. At this point I am very unsure of the state of the system. Everything seems working and the files seem to be all accessible, just as if it synchronized everything, but I'm new to RAID and I'm worried about what is going on. The /proc/mdstat output is: Personalities : [raid1] [linear] [multipath] [raid0] [raid6] [raid5] [raid4] [raid10] md3 : active raid1 sdb4[2](S) sda4[0] 478713792 blocks [2/1] [U_] md2 : active raid1 sdb3[1] sda3[2](F) 244140992 blocks [2/1] [_U] md1 : active raid1 sdb2[1] sda2[2](F) 244140992 blocks [2/1] [_U] md0 : active raid1 sdb1[1] sda1[2](F) 9764800 blocks [2/1] [_U] unused devices: <none> The order of [_U] vs [U_]. Why aren't they consistent along all the array? Is the first U /dev/sda or /dev/sdb? (I tried looking on the web for this trivial information but I found no explicit indication) If I read correctly for md0, [_U] should be /dev/sda1 (down) and /dev/sdb1 (up). But if /dev/sda has failed, how can it be the opposite for md3 ? I understand /dev/sdb4 is now spare because probably it failed to synchronize it 100%, but why does it show /dev/sda4 as up? Shouldn't it be [__]? Or [_U] anyway? The /dev/sda drive now cannot even be accessed by SMART anymore apparently, so I wouldn't expect it to be up. What is wrong with my interpretation of the output? I attach also the outputs of mdadm --detail for the four partitions: /dev/md0: Version : 00.90 Creation Time : Fri Jan 21 18:43:07 2011 Raid Level : raid1 Array Size : 9764800 (9.31 GiB 10.00 GB) Used Dev Size : 9764800 (9.31 GiB 10.00 GB) Raid Devices : 2 Total Devices : 2 Preferred Minor : 0 Persistence : Superblock is persistent Update Time : Tue Nov 5 17:27:33 2013 State : clean, degraded Active Devices : 1 Working Devices : 1 Failed Devices : 1 Spare Devices : 0 UUID : a3b4dbbd:859bf7f2:bde36644:fcef85e2 Events : 0.7704 Number Major Minor RaidDevice State 0 0 0 0 removed 1 8 17 1 active sync /dev/sdb1 2 8 1 - faulty spare /dev/sda1 /dev/md1: Version : 00.90 Creation Time : Fri Jan 21 18:43:15 2011 Raid Level : raid1 Array Size : 244140992 (232.83 GiB 250.00 GB) Used Dev Size : 244140992 (232.83 GiB 250.00 GB) Raid Devices : 2 Total Devices : 2 Preferred Minor : 1 Persistence : Superblock is persistent Update Time : Tue Nov 5 17:39:06 2013 State : clean, degraded Active Devices : 1 Working Devices : 1 Failed Devices : 1 Spare Devices : 0 UUID : 8bcd5765:90dc93d5:cc70849c:224ced45 Events : 0.1508280 Number Major Minor RaidDevice State 0 0 0 0 removed 1 8 18 1 active sync /dev/sdb2 2 8 2 - faulty spare /dev/sda2 /dev/md2: Version : 00.90 Creation Time : Fri Jan 21 18:43:19 2011 Raid Level : raid1 Array Size : 244140992 (232.83 GiB 250.00 GB) Used Dev Size : 244140992 (232.83 GiB 250.00 GB) Raid Devices : 2 Total Devices : 2 Preferred Minor : 2 Persistence : Superblock is persistent Update Time : Tue Nov 5 17:46:44 2013 State : clean, degraded Active Devices : 1 Working Devices : 1 Failed Devices : 1 Spare Devices : 0 UUID : 2885668b:881cafed:b8275ae8:16bc7171 Events : 0.2289636 Number Major Minor RaidDevice State 0 0 0 0 removed 1 8 19 1 active sync /dev/sdb3 2 8 3 - faulty spare /dev/sda3 /dev/md3: Version : 00.90 Creation Time : Fri Jan 21 18:43:22 2011 Raid Level : raid1 Array Size : 478713792 (456.54 GiB 490.20 GB) Used Dev Size : 478713792 (456.54 GiB 490.20 GB) Raid Devices : 2 Total Devices : 2 Preferred Minor : 3 Persistence : Superblock is persistent Update Time : Tue Nov 5 17:19:20 2013 State : clean, degraded Active Devices : 1 Working Devices : 2 Failed Devices : 0 Spare Devices : 1 Number Major Minor RaidDevice State 0 8 4 0 active sync /dev/sda4 1 0 0 1 removed 2 8 20 - spare /dev/sdb4 The active sync on /dev/sda4 baffles me. I am worried because if tomorrow morning I have to replace /dev/sda, I want to be sure what should I sync with what and what is going on. I am also quite baffled by the fact /dev/sda decided to fail exactly when the raid finished resyncing. I'd like to understand what is really happening. Thanks a lot for your patience and help. Massimo

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  • Class member functions instantiated by traits [policies, actually]

    - by Jive Dadson
    I am reluctant to say I can't figure this out, but I can't figure this out. I've googled and searched Stack Overflow, and come up empty. The abstract, and possibly overly vague form of the question is, how can I use the traits-pattern to instantiate member functions? [Update: I used the wrong term here. It should be "policies" rather than "traits." Traits describe existing classes. Policies prescribe synthetic classes.] The question came up while modernizing a set of multivariate function optimizers that I wrote more than 10 years ago. The optimizers all operate by selecting a straight-line path through the parameter space away from the current best point (the "update"), then finding a better point on that line (the "line search"), then testing for the "done" condition, and if not done, iterating. There are different methods for doing the update, the line-search, and conceivably for the done test, and other things. Mix and match. Different update formulae require different state-variable data. For example, the LMQN update requires a vector, and the BFGS update requires a matrix. If evaluating gradients is cheap, the line-search should do so. If not, it should use function evaluations only. Some methods require more accurate line-searches than others. Those are just some examples. The original version instantiates several of the combinations by means of virtual functions. Some traits are selected by setting mode bits that are tested at runtime. Yuck. It would be trivial to define the traits with #define's and the member functions with #ifdef's and macros. But that's so twenty years ago. It bugs me that I cannot figure out a whiz-bang modern way. If there were only one trait that varied, I could use the curiously recurring template pattern. But I see no way to extend that to arbitrary combinations of traits. I tried doing it using boost::enable_if, etc.. The specialized state information was easy. I managed to get the functions done, but only by resorting to non-friend external functions that have the this-pointer as a parameter. I never even figured out how to make the functions friends, much less member functions. The compiler (VC++ 2008) always complained that things didn't match. I would yell, "SFINAE, you moron!" but the moron is probably me. Perhaps tag-dispatch is the key. I haven't gotten very deeply into that. Surely it's possible, right? If so, what is best practice? UPDATE: Here's another try at explaining it. I want the user to be able to fill out an order (manifest) for a custom optimizer, something like ordering off of a Chinese menu - one from column A, one from column B, etc.. Waiter, from column A (updaters), I'll have the BFGS update with Cholesky-decompositon sauce. From column B (line-searchers), I'll have the cubic interpolation line-search with an eta of 0.4 and a rho of 1e-4, please. Etc... UPDATE: Okay, okay. Here's the playing-around that I've done. I offer it reluctantly, because I suspect it's a completely wrong-headed approach. It runs okay under vc++ 2008. #include <boost/utility.hpp> #include <boost/type_traits/integral_constant.hpp> namespace dj { struct CBFGS { void bar() {printf("CBFGS::bar %d\n", data);} CBFGS(): data(1234){} int data; }; template<class T> struct is_CBFGS: boost::false_type{}; template<> struct is_CBFGS<CBFGS>: boost::true_type{}; struct LMQN {LMQN(): data(54.321){} void bar() {printf("LMQN::bar %lf\n", data);} double data; }; template<class T> struct is_LMQN: boost::false_type{}; template<> struct is_LMQN<LMQN> : boost::true_type{}; // "Order form" struct default_optimizer_traits { typedef CBFGS update_type; // Selection from column A - updaters }; template<class traits> class Optimizer; template<class traits> void foo(typename boost::enable_if<is_LMQN<typename traits::update_type>, Optimizer<traits> >::type& self) { printf(" LMQN %lf\n", self.data); } template<class traits> void foo(typename boost::enable_if<is_CBFGS<typename traits::update_type>, Optimizer<traits> >::type& self) { printf("CBFGS %d\n", self.data); } template<class traits = default_optimizer_traits> class Optimizer{ friend typename traits::update_type; //friend void dj::foo<traits>(typename Optimizer<traits> & self); // How? public: //void foo(void); // How??? void foo() { dj::foo<traits>(*this); } void bar() { data.bar(); } //protected: // How? typedef typename traits::update_type update_type; update_type data; }; } // namespace dj int main() { dj::Optimizer<> opt; opt.foo(); opt.bar(); std::getchar(); return 0; }

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  • Recover RAID 5 data after created new array instead of re-using

    - by Brigadieren
    Folks please help - I am a newb with a major headache at hand (perfect storm situation). I have a 3 1tb hdd on my ubuntu 11.04 configured as software raid 5. The data had been copied weekly onto another separate off the computer hard drive until that completely failed and was thrown away. A few days back we had a power outage and after rebooting my box wouldn't mount the raid. In my infinite wisdom I entered mdadm --create -f... command instead of mdadm --assemble and didn't notice the travesty that I had done until after. It started the array degraded and proceeded with building and syncing it which took ~10 hours. After I was back I saw that that the array is successfully up and running but the raid is not I mean the individual drives are partitioned (partition type f8 ) but the md0 device is not. Realizing in horror what I have done I am trying to find some solutions. I just pray that --create didn't overwrite entire content of the hard driver. Could someone PLEASE help me out with this - the data that's on the drive is very important and unique ~10 years of photos, docs, etc. Is it possible that by specifying the participating hard drives in wrong order can make mdadm overwrite them? when I do mdadm --examine --scan I get something like ARRAY /dev/md/0 metadata=1.2 UUID=f1b4084a:720b5712:6d03b9e9:43afe51b name=<hostname>:0 Interestingly enough name used to be 'raid' and not the host hame with :0 appended. Here is the 'sanitized' config entries: DEVICE /dev/sdf1 /dev/sde1 /dev/sdd1 CREATE owner=root group=disk mode=0660 auto=yes HOMEHOST <system> MAILADDR root ARRAY /dev/md0 metadata=1.2 name=tanserv:0 UUID=f1b4084a:720b5712:6d03b9e9:43afe51b Here is the output from mdstat cat /proc/mdstat Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] md0 : active raid5 sdd1[0] sdf1[3] sde1[1] 1953517568 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3/3] [UUU] unused devices: <none> fdisk shows the following: fdisk -l Disk /dev/sda: 80.0 GB, 80026361856 bytes 255 heads, 63 sectors/track, 9729 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x000bf62e Device Boot Start End Blocks Id System /dev/sda1 * 1 9443 75846656 83 Linux /dev/sda2 9443 9730 2301953 5 Extended /dev/sda5 9443 9730 2301952 82 Linux swap / Solaris Disk /dev/sdb: 750.2 GB, 750156374016 bytes 255 heads, 63 sectors/track, 91201 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x000de8dd Device Boot Start End Blocks Id System /dev/sdb1 1 91201 732572001 8e Linux LVM Disk /dev/sdc: 500.1 GB, 500107862016 bytes 255 heads, 63 sectors/track, 60801 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00056a17 Device Boot Start End Blocks Id System /dev/sdc1 1 60801 488384001 8e Linux LVM Disk /dev/sdd: 1000.2 GB, 1000204886016 bytes 255 heads, 63 sectors/track, 121601 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x000ca948 Device Boot Start End Blocks Id System /dev/sdd1 1 121601 976760001 fd Linux raid autodetect Disk /dev/dm-0: 1250.3 GB, 1250254913536 bytes 255 heads, 63 sectors/track, 152001 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/dm-0 doesn't contain a valid partition table Disk /dev/sde: 1000.2 GB, 1000204886016 bytes 255 heads, 63 sectors/track, 121601 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x93a66687 Device Boot Start End Blocks Id System /dev/sde1 1 121601 976760001 fd Linux raid autodetect Disk /dev/sdf: 1000.2 GB, 1000204886016 bytes 255 heads, 63 sectors/track, 121601 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0xe6edc059 Device Boot Start End Blocks Id System /dev/sdf1 1 121601 976760001 fd Linux raid autodetect Disk /dev/md0: 2000.4 GB, 2000401989632 bytes 2 heads, 4 sectors/track, 488379392 cylinders Units = cylinders of 8 * 512 = 4096 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 524288 bytes / 1048576 bytes Disk identifier: 0x00000000 Disk /dev/md0 doesn't contain a valid partition table Per suggestions I did clean up the superblocks and re-created the array with --assume-clean option but with no luck at all. Is there any tool that will help me to revive at least some of the data? Can someone tell me what and how the mdadm --create does when syncs to destroy the data so I can write a tool to un-do whatever was done? After the re-creating of the raid I run fsck.ext4 /dev/md0 and here is the output root@tanserv:/etc/mdadm# fsck.ext4 /dev/md0 e2fsck 1.41.14 (22-Dec-2010) fsck.ext4: Superblock invalid, trying backup blocks... fsck.ext4: Bad magic number in super-block while trying to open /dev/md0 The superblock could not be read or does not describe a correct ext2 filesystem. If the device is valid and it really contains an ext2 filesystem (and not swap or ufs or something else), then the superblock is corrupt, and you might try running e2fsck with an alternate superblock: e2fsck -b 8193 Per Shanes' suggestion I tried root@tanserv:/home/mushegh# mkfs.ext4 -n /dev/md0 mke2fs 1.41.14 (22-Dec-2010) Filesystem label= OS type: Linux Block size=4096 (log=2) Fragment size=4096 (log=2) Stride=128 blocks, Stripe width=256 blocks 122101760 inodes, 488379392 blocks 24418969 blocks (5.00%) reserved for the super user First data block=0 Maximum filesystem blocks=0 14905 block groups 32768 blocks per group, 32768 fragments per group 8192 inodes per group Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968, 102400000, 214990848 and run fsck.ext4 with every backup block but all returned the following: root@tanserv:/home/mushegh# fsck.ext4 -b 214990848 /dev/md0 e2fsck 1.41.14 (22-Dec-2010) fsck.ext4: Invalid argument while trying to open /dev/md0 The superblock could not be read or does not describe a correct ext2 filesystem. If the device is valid and it really contains an ext2 filesystem (and not swap or ufs or something else), then the superblock is corrupt, and you might try running e2fsck with an alternate superblock: e2fsck -b 8193 <device> Any suggestions? Regards!

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  • Why is my mdadm raid-1 recovery so slow?

    - by dimmer
    On a system I'm running Ubuntu 10.04. My raid-1 restore started out fast but quickly became ridiculously slow (at this rate the restore will take 150 days!): dimmer@paimon:~$ cat /proc/mdstat Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] md0 : active raid1 sdc1[2] sdb1[1] 1953513408 blocks [2/1] [_U] [====>................] recovery = 24.4% (477497344/1953513408) finish=217368.0min speed=113K/sec unused devices: <none> Eventhough I have set the kernel variables to reasonably quick values: dimmer@paimon:~$ cat /proc/sys/dev/raid/speed_limit_min 1000000 dimmer@paimon:~$ cat /proc/sys/dev/raid/speed_limit_max 100000000 I am using 2 2.0TB Western Digital Hard Disks, WDC WD20EARS-00M and WDC WD20EARS-00J. I believe they have been partitioned such that their sectors are aligned. dimmer@paimon:/sys$ sudo parted /dev/sdb GNU Parted 2.2 Using /dev/sdb Welcome to GNU Parted! Type 'help' to view a list of commands. (parted) p Model: ATA WDC WD20EARS-00M (scsi) Disk /dev/sdb: 2000GB Sector size (logical/physical): 512B/512B Partition Table: gpt Number Start End Size File system Name Flags 1 1049kB 2000GB 2000GB ext4 (parted) unit s (parted) p Number Start End Size File system Name Flags 1 2048s 3907028991s 3907026944s ext4 (parted) q dimmer@paimon:/sys$ sudo parted /dev/sdc GNU Parted 2.2 Using /dev/sdc Welcome to GNU Parted! Type 'help' to view a list of commands. (parted) p Model: ATA WDC WD20EARS-00J (scsi) Disk /dev/sdc: 2000GB Sector size (logical/physical): 512B/4096B Partition Table: gpt Number Start End Size File system Name Flags 1 1049kB 2000GB 2000GB ext4 I am beginning to think that I have a hardware problem, otherwise I can't imagine why the mdadm restore should be so slow. I have done a benchmark on /dev/sdc using Ubuntu's disk utility GUI app, and the results looked normal so I know that sdc has the capability to write faster than this. I also had the same problem on a similar WD drive that I RMAd because of bad sectors. I suppose it's possible they sent me a replacement with bad sectors too, although there are no SMART values showing them yet. Any ideas? Thanks. As requested, output of top sorted by cpu usage (notice there is ~0 cpu usage). iowait is also zero which seems strange: top - 11:35:13 up 2 days, 9:40, 3 users, load average: 2.87, 2.58, 2.30 Tasks: 142 total, 1 running, 141 sleeping, 0 stopped, 0 zombie Cpu(s): 0.0%us, 0.2%sy, 0.0%ni, 99.8%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 3096304k total, 1482164k used, 1614140k free, 617672k buffers Swap: 1526132k total, 0k used, 1526132k free, 535416k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 45 root 20 0 0 0 0 S 0 0.0 2:17.02 scsi_eh_0 1 root 20 0 2808 1752 1204 S 0 0.1 0:00.46 init 2 root 20 0 0 0 0 S 0 0.0 0:00.00 kthreadd 3 root RT 0 0 0 0 S 0 0.0 0:00.02 migration/0 4 root 20 0 0 0 0 S 0 0.0 0:00.17 ksoftirqd/0 5 root RT 0 0 0 0 S 0 0.0 0:00.00 watchdog/0 6 root RT 0 0 0 0 S 0 0.0 0:00.02 migration/1 ... dmesg errors, definitely looking like hardware: [202884.000157] ata5.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen [202884.007015] ata5.00: failed command: FLUSH CACHE EXT [202884.013728] ata5.00: cmd ea/00:00:00:00:00/00:00:00:00:00/a0 tag 0 [202884.013730] res 40/00:00:ff:59:2e/00:00:35:00:00/e0 Emask 0x4 (timeout) [202884.033667] ata5.00: status: { DRDY } [202884.040329] ata5: hard resetting link [202889.400050] ata5: link is slow to respond, please be patient (ready=0) [202894.048087] ata5: COMRESET failed (errno=-16) [202894.054663] ata5: hard resetting link [202899.412049] ata5: link is slow to respond, please be patient (ready=0) [202904.060107] ata5: COMRESET failed (errno=-16) [202904.066646] ata5: hard resetting link [202905.840056] ata5: SATA link up 3.0 Gbps (SStatus 123 SControl 300) [202905.849178] ata5.00: configured for UDMA/133 [202905.849188] ata5: EH complete [203899.000292] ata5.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen [203899.007096] ata5.00: failed command: IDENTIFY DEVICE [203899.013841] ata5.00: cmd ec/00:01:00:00:00/00:00:00:00:00/00 tag 0 pio 512 in [203899.013843] res 40/00:00:ff:f9:f6/00:00:38:00:00/e0 Emask 0x4 (timeout) [203899.041232] ata5.00: status: { DRDY } [203899.048133] ata5: hard resetting link [203899.816134] ata5: SATA link up 3.0 Gbps (SStatus 123 SControl 300) [203899.826062] ata5.00: configured for UDMA/133 [203899.826079] ata5: EH complete [204375.000200] ata5.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen [204375.007421] ata5.00: failed command: IDENTIFY DEVICE [204375.014799] ata5.00: cmd ec/00:01:00:00:00/00:00:00:00:00/00 tag 0 pio 512 in [204375.014800] res 40/00:00:ff:0c:0f/00:00:39:00:00/e0 Emask 0x4 (timeout) [204375.044374] ata5.00: status: { DRDY } [204375.051842] ata5: hard resetting link [204380.408049] ata5: link is slow to respond, please be patient (ready=0) [204384.440076] ata5: SATA link up 3.0 Gbps (SStatus 123 SControl 300) [204384.449938] ata5.00: configured for UDMA/133 [204384.449955] ata5: EH complete [204395.988135] ata5.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen [204395.988140] ata5.00: failed command: IDENTIFY DEVICE [204395.988147] ata5.00: cmd ec/00:01:00:00:00/00:00:00:00:00/00 tag 0 pio 512 in [204395.988149] res 40/00:00:ff:0c:0f/00:00:39:00:00/e0 Emask 0x4 (timeout) [204395.988151] ata5.00: status: { DRDY } [204395.988156] ata5: hard resetting link [204399.320075] ata5: SATA link up 3.0 Gbps (SStatus 123 SControl 300) [204399.330487] ata5.00: configured for UDMA/133 [204399.330503] ata5: EH complete

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  • e2fsck extremly slow, although enough memory exists

    - by kaefert
    I've got this external USB-Disk: kaefert@blechmobil:~$ lsusb -s 2:3 Bus 002 Device 003: ID 0bc2:3320 Seagate RSS LLC As can be seen in this dmesg output, there are some problems that prevents that disk from beeing mounted: kaefert@blechmobil:~$ dmesg | grep sdb [ 114.474342] sd 5:0:0:0: [sdb] 732566645 4096-byte logical blocks: (3.00 TB/2.72 TiB) [ 114.475089] sd 5:0:0:0: [sdb] Write Protect is off [ 114.475092] sd 5:0:0:0: [sdb] Mode Sense: 43 00 00 00 [ 114.475959] sd 5:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA [ 114.477093] sd 5:0:0:0: [sdb] 732566645 4096-byte logical blocks: (3.00 TB/2.72 TiB) [ 114.501649] sdb: sdb1 [ 114.502717] sd 5:0:0:0: [sdb] 732566645 4096-byte logical blocks: (3.00 TB/2.72 TiB) [ 114.504354] sd 5:0:0:0: [sdb] Attached SCSI disk [ 116.804408] EXT4-fs (sdb1): ext4_check_descriptors: Checksum for group 3976 failed (47397!=61519) [ 116.804413] EXT4-fs (sdb1): group descriptors corrupted! So I went and fired up my favorite partition manager - gparted, and told it to verify and repair the partition sdb1. This made gparted call e2fsck (version 1.42.4 (12-Jun-2012)) e2fsck -f -y -v /dev/sdb1 Although gparted called e2fsck with the "-v" option, sadly it doesn't show me the output of my e2fsck process (bugreport https://bugzilla.gnome.org/show_bug.cgi?id=467925 ) I started this whole thing on Sunday (2012-11-04_2200) evening, so about 48 hours ago, this is what htop says about it now (2012-11-06-1900): PID USER PRI NI VIRT RES SHR S CPU% MEM% TIME+ Command 3704 root 39 19 1560M 1166M 768 R 98.0 19.5 42h56:43 e2fsck -f -y -v /dev/sdb1 Now I found a few posts on the internet that discuss e2fsck running slow, for example: http://gparted-forum.surf4.info/viewtopic.php?id=13613 where they write that its a good idea to see if the disk is just that slow because maybe its damaged, and I think these outputs tell me that this is not the case in my case: kaefert@blechmobil:~$ sudo hdparm -tT /dev/sdb /dev/sdb: Timing cached reads: 3562 MB in 2.00 seconds = 1783.29 MB/sec Timing buffered disk reads: 82 MB in 3.01 seconds = 27.26 MB/sec kaefert@blechmobil:~$ sudo hdparm /dev/sdb /dev/sdb: multcount = 0 (off) readonly = 0 (off) readahead = 256 (on) geometry = 364801/255/63, sectors = 5860533160, start = 0 However, although I can read quickly from that disk, this disk speed doesn't seem to be used by e2fsck, considering tools like gkrellm or iotop or this: kaefert@blechmobil:~$ iostat -x Linux 3.2.0-2-amd64 (blechmobil) 2012-11-06 _x86_64_ (2 CPU) avg-cpu: %user %nice %system %iowait %steal %idle 14,24 47,81 14,63 0,95 0,00 22,37 Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await r_await w_await svctm %util sda 0,59 8,29 2,42 5,14 43,17 160,17 53,75 0,30 39,80 8,72 54,42 3,95 2,99 sdb 137,54 5,48 9,23 0,20 587,07 22,73 129,35 0,07 7,70 7,51 16,18 2,17 2,04 Now I researched a little bit on how to find out what e2fsck is doing with all that processor time, and I found the tool strace, which gives me this: kaefert@blechmobil:~$ sudo strace -p3704 lseek(4, 41026998272, SEEK_SET) = 41026998272 write(4, "\212\354K[_\361\3nl\212\245\352\255jR\303\354\312Yv\334p\253r\217\265\3567\325\257\3766"..., 4096) = 4096 lseek(4, 48404766720, SEEK_SET) = 48404766720 read(4, "\7t\260\366\346\337\304\210\33\267j\35\377'\31f\372\252\ffU\317.y\211\360\36\240c\30`\34"..., 4096) = 4096 lseek(4, 41027002368, SEEK_SET) = 41027002368 write(4, "\232]7Ws\321\352\t\1@[+5\263\334\276{\343zZx\352\21\316`1\271[\202\350R`"..., 4096) = 4096 lseek(4, 48404770816, SEEK_SET) = 48404770816 read(4, "\17\362r\230\327\25\346//\210H\v\311\3237\323K\304\306\361a\223\311\324\272?\213\tq \370\24"..., 4096) = 4096 lseek(4, 41027006464, SEEK_SET) = 41027006464 write(4, "\367yy>x\216?=\324Z\305\351\376&\25\244\210\271\22\306}\276\237\370(\214\205G\262\360\257#"..., 4096) = 4096 lseek(4, 48404774912, SEEK_SET) = 48404774912 read(4, "\365\25\0\21|T\0\21}3t_\272\373\222k\r\177\303\1\201\261\221$\261B\232\3142\21U\316"..., 4096) = 4096 ^CProcess 3704 detached around 16 of these lines every second, so 4 read and 4 write operations every second, which I don't consider to be a lot.. And finally, my question: Will this process ever finish? If those numbers from fseek (48404774912) represent bytes, that would be something like 45 gigabytes, with this beeing a 3 terrabyte disk, which would give me 134 days to go, if the speed stays constant, and he scans the disk like this completly and only once. Do you have some advice for me? I have most of the data on that disk elsewhere, but I've put a lot of hours into sorting and merging it to this disk, so I would prefer to getting this disk up and running again, without formatting it anew. I don't think that the hardware is damaged since the disk is only a few months and since I can't see any I/O errors in the dmesg output. UPDATE: I just looked at the strace output again (2012-11-06_2300), now it looks like this: lseek(4, 1419860611072, SEEK_SET) = 1419860611072 read(4, "3#\f\2447\335\0\22A\355\374\276j\204'\207|\217V|\23\245[\7VP\251\242\276\207\317:"..., 4096) = 4096 lseek(4, 43018145792, SEEK_SET) = 43018145792 write(4, "]\206\231\342Y\204-2I\362\242\344\6R\205\361\324\177\265\317C\334V\324\260\334\275t=\10F."..., 4096) = 4096 lseek(4, 1419860615168, SEEK_SET) = 1419860615168 read(4, "\262\305\314Y\367\37x\326\245\226\226\320N\333$s\34\204\311\222\7\315\236\336\300TK\337\264\236\211n"..., 4096) = 4096 lseek(4, 43018149888, SEEK_SET) = 43018149888 write(4, "\271\224m\311\224\25!I\376\16;\377\0\223H\25Yd\201Y\342\r\203\271\24eG<\202{\373V"..., 4096) = 4096 lseek(4, 1419860619264, SEEK_SET) = 1419860619264 read(4, ";d\360\177\n\346\253\210\222|\250\352T\335M\33\260\320\261\7g\222P\344H?t\240\20\2548\310"..., 4096) = 4096 lseek(4, 43018153984, SEEK_SET) = 43018153984 write(4, "\360\252j\317\310\251G\227\335{\214`\341\267\31Y\202\360\v\374\307oq\3063\217Z\223\313\36D\211"..., 4096) = 4096 So this number of the lseeks before the reads, like 1419860619264 are already a lot bigger, standing for 1.29 terabytes if the numbers are bytes, so it doesn't seem to be a linear progress on a big scale, maybe there are only some areas that need work, that have big gaps in between them. (times are in CET)

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  • How can i add a checkbox for optional files during install? (innosetup)

    - by Globulorozzo
    i'm trying to make a custom checkbox in my custom page (because is a one page installer), is needed only a checkbox without dialogs or anything, the installer that i'm trying to compile is very linear and simple. i want to bind "FILE3.EXE" on a checkbox in this way: if checkbox is checked copy the file (FILE3.EXE) in DestDir, otherwise if checkbox is unchecked skip the file (FILE3.EXE) during installation. This is the code that i use, obviously the checkbox code is missing because i'm not able to do that [Files] Source: FILE1.EXE; DestDir: {app}; Source: FILE2.EXE; DestDir: {app}; Source: FILE3.EXE; DestDir: {app}; //OPTIONAL [Code] procedure ExitProcess(uExitCode: UINT); external '[email protected] stdcall'; var MainPage : TWizardPage; FolderToInstall : TEdit; InstallLocation : String; procedure CancelClick(Sender: TObject); begin if ExitSetupMsgBox then begin ExitProcess(0); end; end; procedure BrowseClick(Sender : TObject); var Dir : String; begin Dir := FolderToInstall.Text; if BrowseForFolder('Browse',Dir,false) then FolderToInstall.Text := Dir; WizardForm.DirEdit.Text := Dir; end; procedure InitializeWizard(); var LabelFolder : TLabel; begin WizardForm.ClientWidth:=ScaleX(550); WizardForm.ClientHeight:=ScaleY(250); WizardForm.Center; WizardForm.OuterNotebook.Hide; WizardForm.InnerNotebook.Hide; WizardForm.Bevel.hide; Wizardform.NextButton.top := 180; Wizardform.NextButton.Left := 470; WizardForm.NextButton.Height := 25; WizardForm.StatusLabel.Parent := WizardForm; WizardForm.StatusLabel.Left := 6; WizardForm.StatusLabel.Top := 206; WizardForm.FilenameLabel.Parent := WizardForm; WizardForm.FilenameLabel.Left := 87; WizardForm.FilenameLabel.Top := 206; WizardForm.FilenameLabel.Width := ScaleX(383); WizardForm.ProgressGauge.Parent := WizardForm; WizardForm.ProgressGauge.Left :=5; WizardForm.ProgressGauge.Top := 222; WizardForm.ProgressGauge.Width := ScaleX(460); MainPage := CreateCustomPage(wpWelcome,'',''); LabelFolder := TLabel.Create(MainPage); LabelFolder.Parent := WizardForm; LabelFolder.Top := 164; LabelFolder.Left := 6; LabelFolder.Caption := 'Directory:' FolderToInstall := TEdit.Create(MainPage); FolderToInstall.Parent := WizardForm; FolderToInstall.Top := 182; FolderToInstall.Left := 85; FolderToInstall.Width := 380; FolderToInstall.Text := WizardDirValue; FolderToInstall.ReadOnly := True; end;

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  • CodePlex Daily Summary for Tuesday, May 04, 2010

    CodePlex Daily Summary for Tuesday, May 04, 2010New ProjectsAlbum photo de club - Club's Photos Album: Un album photos permettant d'afficher les photos et le détails des membres d'un club - Photo album allowing to view photos and details of the membersBlog.Net Blogging Components: Blog.Net server-side blogging components to add a blog to your current ASP.NET website.FilePirate - Really Advanced LAN File Sharing: Really Advanced, yet super easy, LAN Party File Sharing written using the .Net Framework and C#. Ditch DirectConnect or Windows File Sharing at y...Fisiogest: Programa de gestión de una clínica de fisioterapiaIdeaNMR: An online repository of NMR experiment automated setups with wiki type documentation library and client program providing automated experiment setu...Introducción a Unity: Código de ejemplo del uso de Unity en diferentes situaciones. - Registro de clases, instancias e interfaces. - Resolución de clases, instancias e...Iowa City .NET Developers: This is the project site for the Iowa City .NET Developers.isanywhere: A command line utility to see if one or more files (given a filemask) are to be found anywhere inside a specific directory, or elsewhere inside one...LczCode: lczLog4net udp logs viewer: UdpLogViewer is a .NET 4 WinForm application that receives udp messages from log4net and shows them in a grid. It is possible to filter them or sh...New Silverlight XPS Viewer (In Sl4): New Silverlight XPS viewer Novuz: Novuz is a usenet indexer and reporter. It's developed both in Visual Studio 2010 and MonoDevelop, one of the key features of Novuz is that it sho...PodSnatch: PodSnatch is a podcast client that makes it easy to download rss-enclosures. Multiple simultaneous downloads enabled by threading. GUI is built wi...Robot Shootans: A simple top down shooter game where the player has to kill robots running at them. Written in C++ using SDL with various extentionsSharePoint Rsync List: This program will syncronize files and directories from and unc/local/sharepoint to a SharePoint 2007 or 2010 server. Supports of to 2GB files and ...SignInAndStorageLib: SignInAndStorageLib makes properly handling both sign in and storage issues in Xbox 360 XBLIG XNA games simple. Written in C#, SignInAndStorageLib...SilverBBS: ANSI-style bbs experience delivered via Silverlight. Silverlight flip-down counter: A Silverlight widget that enables you to count down towards a preconfigured event on a configured date.SmartieFly: Smartie Fly is a quiz software program written in C# using Silverlight. It uses SQL Server as a backend database. VS2010 Framework Driven Testing: CodedUITests generate a lot of code, and they break on every change to the object under test. Goals: - write new tests manually, but with as litt...WMediaCatalog: Advanced multimedia cataloguer. Allows users to keep their musical collections well organized and provides flexible methods of filtering, serarching WPathFinder: A simple path management application for windows. Functionality includes: - Add/remove/change path entries easily. - Search for all instances of a...Yasminoku: Yasminoku is an open source "Sudoku" alike game totally written in DHTML (JavaScript, CSS and HTML) that uses mouse. Includes sudoku solver. This c...New ReleasesAlbum photo de club - Club's Photos Album: App - version 0.4: version 0.4 - Critère d'affichage des membres : nom, année, ville - Navigation entre les images d'un membres - Navigation entre les membres - Affi...Album photo de club - Club's Photos Album: Code - Version 0.4: Code source de la version 0.4BigDecimal: Concept Evaluation Release 2 (BigDecimals): This in the second updates release of BigDecimals. It has the four simple arithmetic rules Addition, Subtract, Multiple and Division.CBM-Command: 2010-05-03: New features in this build Keyboard Shortcuts Panel Swapping Panel Toggling On/Off Toggling 40/80 Columns Confirming Quit Confirming GO64...Directory Linker: Directory Linker 2: This release introduces Undo Support and Symbolic File Link support. More details can be found here http://www.humblecoder.co.uk/?p=141DotNetNuke Skins Pack: DotNetNuke 80 Skins Pack: This released is the first for DNN 4 & 5 with Skin Token Design (legacy skin support on DNN 4 & 5)DTLoggedExec: 1.0.0.0: -FIRST NON-BETA RELEASE! :) -Code cleaned up -Added SetPackageInfo method to ILogProvider interface to make easier future improvements -Deprecated...GenerateTypedBamApi: Version 2.1: Changes in this release: NEW: Support for Office Data Connectivity Components 2010 NEW: Include both x86 and x64 EXE's due to lack of support in ...HobbyBrew Mobile: Beta 1 Refresh: Risolto bug circa il salvataggio di ricette (veniva impostato scorrettamente che si trattava di Mash Design "infusione" se ri-aperte con hobbyBrew)...Home Access Plus+: v4.2: Version 4.2 Added Overrides into the Booking System Some slight CSS changes to the Help Desk Updated the config tool to work anywhere on the LA...Hubble.Net - Open source full-text search database: V0.8.3.0: V0.8.3.0 Show server version in about dialog. Fix a bug of deleting querycache files. V0.8.2.9 Change sql client to support userid and password Ch...IdeaNMR: IdeaNMR Client: This is a client program with an example package.kdar: KDAR 0.0.21: KDAR - Kernel Debugger Anti Rootkit - signature's bases updated - usability increased - NDIS6 MINIPORT_BLOCK checks addedLightWeight Application Server: 0.4.1: One step further to beta - yet another release for c# developers audience only. Changes: 1. API - added a LWAS.Infrastructure.Storage service to d...Log4net udp logs viewer: UdpLogViewer 1.0: First release of UdpLogViewer, version 1.0.MDownloader: MDownloader-0.15.11.58370: Fixed minor bugs.Metabolite Enterprise Libraries for EPiServer CMS using Page Type Builder: Metabolite Enterprise Libraries 1.2 Beta 2: This is the beta release of the Metabolite Enterprise Libraries 1.2 Beta 2 for use with EPiServer 6 and Page Type Builder 1.2 Beta 2.Microsoft Silverlight Analytics Framework: Version 1.4.3 Installer: Pre-release Installer for Visual Studio 2010 and Expression Blend 4 RCSupports both Silverlight 3 and Silverlight 4 Release NotesFixed null referen...MultipointTUIO: Multipoint SDK v1.5 Release: Rebuilt against v1.5 of the Microsoft Multipoint SDK, this mean Windows 7 support (and 64bit I think!)My Notepad: My Notepad: This is the status of My Notepad until now. This is many built in features but has to undergo a lot of modifications. The release does not include ...New Silverlight XPS Viewer (In Sl4): Silverlight XPS Viewer: Background: During my development last week I was working on a Silverlight based XPS viewer. During this viewer we came to a situation in which the...NSIS Autorun: NSIS Autorun 0.1.6: This release includes source code, executable binary, files and example materials.Open Diagram: Open Diagram 5.0 Beta May 2010: This is the first beta release of Open Diagram 5.0. Select Crainiate.Diagramming.Examples.Forms as the startup project to view the current Class D...Pocket Wiki: PC Wiki (zip) 1.0.1: PC Version of Pocket Wiki. Unzip and run. Requires .NET Framework 2.0Pocket Wiki: Pocket Wiki 1.0.1 (cab): Pocket Wiki cab installation - requires DotNet 2.0 or greater. Default wiki language is "slash" - a syntax I created that is easy to type on keyboa...Pocket Wiki: Pocket Wiki.sbp: Pocket Wiki Source Code (version .72) - Basic4PPCPublish to Photo Frame: 1.0.2.0: This version adds: add borders to portrait images, for photo frames that crop them incorrectly.Reflection Studio: Reflection Studio 0.1: First download release, it contains a lot of things but allways in beta version. Hope you will like the preview.SharePoint 2010 PowerShell Scripts & Utilities: PSSP2010 Utils 0.1: This is the initial release with SPInstallUtils.psm1 module. This module includes Get-SPPrerequisites and New-SPInstallPackage cmdlets. Refer to th...Silverlight 4.0 Popup Menu: Context Menu for Silverlight 4.0 v1.1 Beta: Multilevel menus are now supported. Added design time support for the PopupMenuItem elements. The project is now under Subversion.Silverlight flip-down counter: FlipDownCounter v1.0: The final release of the Silverlight flip-down counter. Please refer to the included readme file for information on how to use the counter.Stratosphere: Stratosphere 1.0.0.1: Moved scalable block file system implementation to Stratosphere.FileSystemSystem.AddIn Pipeline Builder: Pipeline Builder 1.2: Lots of improvements from the CTP, version 1.0: - Added dialogue for possible overwrite if the file has changed: possibility of ignoring changes (p...ThoughtWorks Cruise Notification Interceptor: 1.0.1: Fixed an issue with the regex that parses the incoming notification. This issue would send failure messages when the build was "fixed".ThreadSafeControls: ThreadSafeControls v0.1: This is the first binary release of the ThreadSafeControls library. I'll call it a pre-alpha release.TracerX Logger/Viewer for .NET: 4.0: View this CodeProject article for documentation on how to use the latest version of the Logger. About the DownloadsVersion: 4.0.1005.1163 Changese...VCC: Latest build, v2.1.30503.0: Automatic drop of latest buildVisual Studio DSite: Lottery Game (Visual C++ 2008): An advanced lottery game made in visual c 2008.VivoSocial: VivoSocial 7.1.3: Version 7.1.3 of VivoSocial has been released. If you experienced any issues with the previous version, please update your modules to the 7.1.3 rel...Xrns2XMod: Xrns2XMod 1.0: Features added Conversion of all possible convertible features between Renoise and MOD / XM. FlacBox lib updated (thanks to Yuri) NAudio lib in...Most Popular ProjectsRawrWBFS ManagerAJAX Control ToolkitMicrosoft SQL Server Product Samples: Databasepatterns & practices – Enterprise LibrarySilverlight ToolkitiTuner - The iTunes CompanionWindows Presentation Foundation (WPF)ASP.NETDotNetNuke® Community EditionMost Active ProjectsIonics Isapi Rewrite Filterpatterns & practices – Enterprise LibraryRawrHydroServer - CUAHSI Hydrologic Information System ServerAJAX Control Frameworkpatterns & practices: Azure Security GuidanceNB_Store - Free DotNetNuke Ecommerce Catalog ModuleBlogEngine.NETTinyProjectDambach Linear Algebra Framework

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  • CodePlex Daily Summary for Friday, May 07, 2010

    CodePlex Daily Summary for Friday, May 07, 2010New ProjectsBibleBrowser: BibleBrowserBibleMaps: BibleMapsChristianLibrary: ChristianLibraryCLB Podcast Module: DotNetNuke Module used to allow DNN to host one or more podcasts within a portal.Coletivo InVitro: Nova versão do Site do ColetivoCustomer Care Accelerator for Microsoft Dynamics CRM: Customer Care Accelerator for Microsoft Dynamics CRM.EasyTFS: A very lightweight, quick, web-based search application for Team Foundation Server. EasyTfs searches as you type, providing real-time search resul...FSCommunity: abcGeocache Downloader: GeocacheDownloader helps you download geocache information in an organised way, making easier to copy the information to your device. The applicati...Grabouille: Grabouille aims to be an incubation project for Microsoft best patterns & practices and also a container for last .Net technologies. The goal is, i...Klaverjas: Test application for testing different new technologies in .NET (WCF, DataServices, C# stuff, Entity...etc.)Livecity: Social network. Alpha 0.1MarxSupples: testMOSS 2007 - Excel Services: This helps you understand MOSS 2007 - Excel Services and how to use the same in .NETmy site: a personal web siteNazTek.Extension.Clr35: Contains a set of CLR 3.5 extensions and utility APInetDumbster: netDumbster is a .Net Fake SMTP Server clone of the popular Dumbster (http://quintanasoft.com/dumbster/) netDumbster is based on the API of nDumbs...Object-Oriented Optimization Toolbox (OOOT): A library (.dll) of various linear, nonlinear, and stochastic numerical optimization techniques. While some of these are older than 50 years, they ...OMap - Object to Object Mapper: OMap is a simple object to object mapper. It could be used for scenarios like mapping your data from domain objects into data transfer objects.PDF Renderer for BlackBerry.: Render and view PDF files on BlackBerry using a modified version of Sun's PDF Renderer.Pomodoro Tool: Pomodoro Tool is a timer for http://www.pomodorotechnique.com/ . It's a timer and task tracker with a text task editing interface.ReadingPlan: ReadingPlanRil#: .net library to use the public Readitlater.com public APISCSM Incident SLA Management: This project provides an extension to System Center Service Manager to provide more granular control over incident service level agreement (SLA) ma...SEAH - Sistema Especialista de Agravante de Hipertensão: O SEAH tem como propósito alertar o indivíduo em relação ao seu agravante de hipertensão arterial e a órgãos competentes, entidades de ensino, pesq...StudyGuide: StudyGuideTest Project (ignore): This is used to demonstrate CodePlex at meetings. Please ignore this project.YCC: YCC is an open source c compiler which compatible with ANSI standard.The project is currently an origin start.We will work it for finally useable a...New ReleasesAlbum photo de club - Club's Photos Album: App - version 0.5: Modifications : - Ajout des favoris - Ajout de l'update automatique /*/ - Add favorites - Add automatic updateBoxee Launcher: Boxee Launcher 1.0.1.5: Boxee Launcher finds the BOXEE executable using a registry key that BOXEE creates. The new version of BOXEE changed the location. Boxee Launcher ha...CBM-Command: 2010-05-06: Release Notes - 2010-05-06New Features Creating Directories Deleting Files and Directories Renaming Files and Directories Changes 40 columns i...Customer Care Accelerator for Microsoft Dynamics CRM: Customer Care Accelerator for Dynamics CRM R1: The Customer Care Accelerator (CCA) for Microsoft Dynamics CRM focuses on delivering contact center enabling functionality, such as the ability to ...D-AMPS: D-AMPS 0.9.2: Add .bat files for command-line running Bug fixed (core engine) Section 6, 8, 9 modifications Sources (Fortran) for core engineDynamicJson: Release 1.1.0.0: Add - foreach support Add - Dynamic Shortcut of IsDefined,Delete,Deserialize Fix - Deserialize Delete - LengthEasyTFS: EasyTfs 1.0 Beta 1: A very lightweight, quick, web-based search application for Team Foundation Server. EasyTfs searches as you type, providing real-time search resul...Event Scavenger: Add installer for Admin tool: Added installer for Admin tool. Removed exe's for admin and viewer from zip file - were replaced by the msi installers.Expression Blend Samples: PathListBoxUtils for Expression Blend 4 RC: Initial release of the PathListBoxUtils samples.HackingSilverlight Code Browser: HackingSilverlight Code Browser: Out with the old and in with the new... the HackingSilverlight Code Browser is a reference tool for code snippets so that I can not have to remembe...Hammock for REST: Hammock v1.0.3: v1.0.3 ChangesFixes for OAuth escaping and API usage Added FollowRedirects feature to RestClient/RestRequest v1.0.2 Changes.NET 4.0 and Client P...ImmlPad: ImmlPad Beta 1.1.1: Changes in this release: Added more intelligent right-click menu's to allow opening an IMML document with a specific Player version Fixed issue w...LinkedIn® for Windows Mobile: LinkedIn for Windows Mobile v0.8: Improved error message dumping + moved OAuth parameters from www.* to api.* In case of unexpected errors, check "Application Data\LinkedIn for Wind...Live-Exchange Calendar Sync: Installer: Alpha release of Live-Exchange Calendar SyncMAPILab Explorer for SharePoint: MAPILab Explorer for SharePoint ver 2.1.0: 1) Get settings form old versions 2) Rules added to display enumerable object items. 3) Bug fixed with remove persisted object How to install:Do...MapWindow6: MapWindow 6.0 msi May 6, 2010: This release enables output .prj files to also show the ESRI names for the PRJCS, GEOCS, and the DATUM. It also fixes a bug that was preventing th...MOSS 2007 - Excel Services: Calculator using Excel Services: Simple calculator using Excel ServicesMvcMaps - Unified Bing/Google Mapping API for ASP.NET MVC: MvcMaps Preview 1 for ASP.NET 4.0 and VS'2010: There was a change in ASP.NET 4.0 that broke the release, so a small modification needed to be made to the reflection code. This release fixes that...NazTek.Extension.Clr35: NazTek.Extension.Clr35 Binary Cab: Binary cab fileNazTek.Extension.Clr35: NazTek.Extension.Clr35 Source Cab: Source codePDF Renderer for BlackBerry.: PDF Renderer 0.1 for BlackBerry: This library requires a BlackBerry Signing Key in order to compile for use on a BlackBerry device. Signing keys can be obtained at BlackBerry Code ...Pomodoro Tool: PomodoroTool Clickonce installer: PomodoroTool Clickonce installerPOS for .Net Handheld Products Service Object: POS for .Net Handheld Products Service Object 1002: New version (1.0.0.2) which should support 64 bit platforms (see ReadMe.txt included with source for details). Source code only.QuestTracker: QuestTracker 0.4: What's New in QuestTracker 0.4 - - You can now drag and drop the quests on the left pane to rearrange or move quests from one group to another. - D...RDA Collaboration Team Projects: Property Bag Cmdlet: This cmdlet allows to retrieve, insert and update property bag values at farm, web app, site and web scope. The same operations can be in code usi...Ril#: Rilsharp 1.0: The first version of the Ril# (Readitlater sharp) library.Scrum Sprint Monitor: v1.0.0.47911 (.NET 4-TFS 2010): What is new in this release? Migrated to .NET Framework 4 RTM; Compiled against TFS 2010 RTM Client DLLs; Smoother animations with easing funct...SCSM Incident SLA Management: SCSM Incident SLA Management Version 0.1: This is the first release of the SCSM SLA Management solution. It is an 'alpha' release and has only been tested by the developers on the project....StackOverflow Desktop Client in C# and WPF: StackOverflow Client 0.4: Shows a popup that displays all the new questions and allows you to navigate between them. Fixed a bug that showed incorrect views and answers in t...Transcriber: Transcriber V0.1: Pre-release, usable but very rough.VCC: Latest build, v2.1.30506.0: Automatic drop of latest buildVisual Studio CSLA Extension for ADO.NET Entity Framework: CslaExtension Beta1: Requirements Visual Studio 2010 CSLA 4.0. Beta 1 Installation Download VSIX file and double click to install. Open Visual Studio -> Tools -> Exte...Most Popular ProjectsRawrWBFS ManagerAJAX Control ToolkitMicrosoft SQL Server Product Samples: DatabaseSilverlight Toolkitpatterns & practices – Enterprise LibraryWindows Presentation Foundation (WPF)ASP.NETDotNetNuke® Community EditionMicrosoft SQL Server Community & SamplesMost Active Projectspatterns & practices – Enterprise LibraryAJAX Control FrameworkIonics Isapi Rewrite FilterRawrpatterns & practices: Azure Security GuidanceCaliburn: An Application Framework for WPF and SilverlightBlogEngine.NETTweetSharpNB_Store - Free DotNetNuke Ecommerce Catalog ModuleTinyProject

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  • Inside the Concurrent Collections: ConcurrentBag

    - by Simon Cooper
    Unlike the other concurrent collections, ConcurrentBag does not really have a non-concurrent analogy. As stated in the MSDN documentation, ConcurrentBag is optimised for the situation where the same thread is both producing and consuming items from the collection. We'll see how this is the case as we take a closer look. Again, I recommend you have ConcurrentBag open in a decompiler for reference. Thread Statics ConcurrentBag makes heavy use of thread statics - static variables marked with ThreadStaticAttribute. This is a special attribute that instructs the CLR to scope any values assigned to or read from the variable to the executing thread, not globally within the AppDomain. This means that if two different threads assign two different values to the same thread static variable, one value will not overwrite the other, and each thread will see the value they assigned to the variable, separately to any other thread. This is a very useful function that allows for ConcurrentBag's concurrency properties. You can think of a thread static variable: [ThreadStatic] private static int m_Value; as doing the same as: private static Dictionary<Thread, int> m_Values; where the executing thread's identity is used to automatically set and retrieve the corresponding value in the dictionary. In .NET 4, this usage of ThreadStaticAttribute is encapsulated in the ThreadLocal class. Lists of lists ConcurrentBag, at its core, operates as a linked list of linked lists: Each outer list node is an instance of ThreadLocalList, and each inner list node is an instance of Node. Each outer ThreadLocalList is owned by a particular thread, accessible through the thread local m_locals variable: private ThreadLocal<ThreadLocalList<T>> m_locals It is important to note that, although the m_locals variable is thread-local, that only applies to accesses through that variable. The objects referenced by the thread (each instance of the ThreadLocalList object) are normal heap objects that are not specific to any thread. Thinking back to the Dictionary analogy above, if each value stored in the dictionary could be accessed by other means, then any thread could access the value belonging to other threads using that mechanism. Only reads and writes to the variable defined as thread-local are re-routed by the CLR according to the executing thread's identity. So, although m_locals is defined as thread-local, the m_headList, m_nextList and m_tailList variables aren't. This means that any thread can access all the thread local lists in the collection by doing a linear search through the outer linked list defined by these variables. Adding items So, onto the collection operations. First, adding items. This one's pretty simple. If the current thread doesn't already own an instance of ThreadLocalList, then one is created (or, if there are lists owned by threads that have stopped, it takes control of one of those). Then the item is added to the head of that thread's list. That's it. Don't worry, it'll get more complicated when we account for the other operations on the list! Taking & Peeking items This is where it gets tricky. If the current thread's list has items in it, then it peeks or removes the head item (not the tail item) from the local list and returns that. However, if the local list is empty, it has to go and steal another item from another list, belonging to a different thread. It iterates through all the thread local lists in the collection using the m_headList and m_nextList variables until it finds one that has items in it, and it steals one item from that list. Up to this point, the two threads had been operating completely independently. To steal an item from another thread's list, the stealing thread has to do it in such a way as to not step on the owning thread's toes. Recall how adding and removing items both operate on the head of the thread's linked list? That gives us an easy way out - a thread trying to steal items from another thread can pop in round the back of another thread's list using the m_tail variable, and steal an item from the back without the owning thread knowing anything about it. The owning thread can carry on completely independently, unaware that one of its items has been nicked. However, this only works when there are at least 3 items in the list, as that guarantees there will be at least one node between the owning thread performing operations on the list head and the thread stealing items from the tail - there's no chance of the two threads operating on the same node at the same time and causing a race condition. If there's less than three items in the list, then there does need to be some synchronization between the two threads. In this case, the lock on the ThreadLocalList object is used to mediate access to a thread's list when there's the possibility of contention. Thread synchronization In ConcurrentBag, this is done using several mechanisms: Operations performed by the owner thread only take out the lock when there are less than three items in the collection. With three or greater items, there won't be any conflict with a stealing thread operating on the tail of the list. If a lock isn't taken out, the owning thread sets the list's m_currentOp variable to a non-zero value for the duration of the operation. This indicates to all other threads that there is a non-locked operation currently occuring on that list. The stealing thread always takes out the lock, to prevent two threads trying to steal from the same list at the same time. After taking out the lock, the stealing thread spinwaits until m_currentOp has been set to zero before actually performing the steal. This ensures there won't be a conflict with the owning thread when the number of items in the list is on the 2-3 item borderline. If any add or remove operations are started in the meantime, and the list is below 3 items, those operations try to take out the list's lock and are blocked until the stealing thread has finished. This allows a thread to steal an item from another thread's list without corrupting it. What about synchronization in the collection as a whole? Collection synchronization Any thread that operates on the collection's global structure (accessing anything outside the thread local lists) has to take out the collection's global lock - m_globalListsLock. This single lock is sufficient when adding a new thread local list, as the items inside each thread's list are unaffected. However, what about operations (such as Count or ToArray) that need to access every item in the collection? In order to ensure a consistent view, all operations on the collection are stopped while the count or ToArray is performed. This is done by freezing the bag at the start, performing the global operation, and unfreezing at the end: The global lock is taken out, to prevent structural alterations to the collection. m_needSync is set to true. This notifies all the threads that they need to take out their list's lock irregardless of what operation they're doing. All the list locks are taken out in order. This blocks all locking operations on the lists. The freezing thread waits for all current lockless operations to finish by spinwaiting on each m_currentOp field. The global operation can then be performed while the bag is frozen, but no other operations can take place at the same time, as all other threads are blocked on a list's lock. Then, once the global operation has finished, the locks are released, m_needSync is unset, and normal concurrent operation resumes. Concurrent principles That's the essence of how ConcurrentBag operates. Each thread operates independently on its own local list, except when they have to steal items from another list. When stealing, only the stealing thread is forced to take out the lock; the owning thread only has to when there is the possibility of contention. And a global lock controls accesses to the structure of the collection outside the thread lists. Operations affecting the entire collection take out all locks in the collection to freeze the contents at a single point in time. So, what principles can we extract here? Threads operate independently Thread-static variables and ThreadLocal makes this easy. Threads operate entirely concurrently on their own structures; only when they need to grab data from another thread is there any thread contention. Minimised lock-taking Even when two threads need to operate on the same data structures (one thread stealing from another), they do so in such a way such that the probability of actually blocking on a lock is minimised; the owning thread always operates on the head of the list, and the stealing thread always operates on the tail. Management of lockless operations Any operations that don't take out a lock still have a 'hook' to force them to lock when necessary. This allows all operations on the collection to be stopped temporarily while a global snapshot is taken. Hopefully, such operations will be short-lived and infrequent. That's all the concurrent collections covered. I hope you've found it as informative and interesting as I have. Next, I'll be taking a closer look at ThreadLocal, which I came across while analyzing ConcurrentBag. As you'll see, the operation of this class deserves a much closer look.

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  • CodePlex Daily Summary for Saturday, May 22, 2010

    CodePlex Daily Summary for Saturday, May 22, 2010New ProjectsDocument Toolkit Extensions: Document Toolkit Extensions provide a variety of samples, document converters and helpers for Document Toolkit, a fast, feature-rich and 100% clien...dream: dreamEnhanced Web Controls: The Enhanced Web Control Library Contains web controls that enhance the functionality of the microsoft input controls. New functionality includes l...Europe Engulfed: Europe Engulfed is a PC version of the classic GMT board war game of the same name simulating World War II in the European theater. It is develope...eXpress Persistent Objects (XPO) Toolkit: eXpress Persistent Objects (XPO) Toolkit provides extensions to the DevExpress Object-Relational Mapping Suite.FBGraph.NET: Write apps for Facebook's Graph API using .NET. Includes support for C#, VB.NET, ASP.NET WebForms and ASP.NET MVC.HugeFlow.OOB: Silverlight OOB Library It supports useful custom controls. WindowChrome, InstallScreen. LivePad: LivePad, It can be used to record your life journey. LivePad,可以用来记录您的人生历程。Management listings: The project is management adsMerthin: Merthin is an F# based Framework which boundaries are not defined yet. For now a bit of linear algebra.Mobile Exchange: Mobile Exchange is a .NET Compact Framework library and sample application for accessing the Stack Exchange API available on sites like Stack Overf...PC/SC Micro: PC/SC Micro is an API and a library. The API is a subset of the PC/SC Lite API and allows a .NET Micro Framework application to communicate with ...SerialPortLogger: SerialPortLogger is a simple monitoring application which montors the serial port and outputs to a database.SharePoint NNTP List Sync: Syncronizes NNTP groups with SharePoint lists and offers post/reply capability. Sets item date as post date and attempts to lookup user in local d...Simple Help System: Simple Help System (SHS) je jednoduchý nápovědný systém jak pro vývojáře tak pro obyčejné lidi. Vyvýjeno v C#.SoulHackers Demon Unite(Chinese version): SoulHackers Demon Unite calculate program, for Chinese version on PlayStationTPager: Mercurial pager with color support on WindowsWork Item Query Administration: Work Item Query Administration (wiqadmin) is command-line utility to manage work item queries in Team Foundation Server. For any TeamProject you ca...XPlatformCPP: A cross platform C++ rendering API, that uses either OpenGL 2.1 or Direct3D 9.0c as a backend. Works with Win32API (Windows), Xlib (Linux,etc...), ...Xshell: Xshell is a replacement for the Windows Explorer shell designed for Media Center/Home Theater PCs.عبر السـدم: عبر السدم هي لعبة ثلاثية الأبعاد من إنجاز أعضاء الشبكة العربية لمطوري الألعاب بالاعتماد على تقنية XNA. http://www.agdn-online.com http://www.ag...New ReleasesAzure Publish-Subscribe: Azure Pub-Sub Developer Manual v0.1: Very early alpha of the documentation. It's an early look at the architecture only.Chaow Framework: Chaow Framework V1.00: Project Description Chaow Framework is the set of class libraries designed for enhancing standard .NET framework. It allows you to write more simpl...Document Toolkit Extensions: Document Toolkit Extensions Beta 1: The first public beta release of Document Toolkit and Document Toolkit Extensions.DotNetNuke Russian Language packs: Core Russian Language Pack for DNN 05.04.02: Core Russian Language Pack for DNN 05.04.02 Добавлены несколько ресурсов из новой редакции... Исправлены ошибки и описки.DynamicJson: Release 1.2.0.0: Fix - Deserialize(cast) can't convert to dynamic[] Fix - Deserialize(cast) throw exception if has getonly propertyEnhanced Web Controls: Enhanced Web Controls: This download includes the Enhanced Web Control Library DLL. Also inlcuded is the most recently tested version of the Ajax Control Toolkit, you may...Europe Engulfed: Europe Engulfed: This is the first release for the Codeplex-based project. It includes all source code changes up to and including Change Set 50762. To use: copy ...Extend SmallBasic: Teaching Extensions v.017: added a quiz for spiderweb recipeFree Silverlight & WPF Chart Control - Visifire: Visifire SL and WPF Charts v3.1.0 Released: Hi, This release contains the following enhancements: Mouse events for TrendLine have been implemented. You can go through Visifire documentation...Free Silverlight & WPF Chart Control - Visifire: Visifire SL and WPF Charts v3.5.3 Released: Hi, This release contains the following enhancements: Mouse events for TrendLine have been implemented. You can go through Visifire documentation...GreedyRSS: GreedyRSS 2.1: SuchSofts GreedyRSS平台整体更新至2.1版,重写了大量代码,可见还不够成熟稳定。此外还有以下几点主要更新: 增加一个辅助类Settings,参见http://semify.spaces.live.com/blog/cns!7CB96C25969B3811!2345.entry...HugeFlow.OOB: HugeFlow.OOB 0.9 Beta for SL4: First release!NLog - Advanced .NET Logging: Nightly Build 2010.05.21.001: Changes since the last build:2010-05-20 23:20:17 Jarek Kowalski added tests for CsvLayout, refactored TargetWithLayoutHeaderAndFooter 2010-05-20 2...patterns & practices SharePoint Guidance: SPG 2010 Drop11: SharePoint Guidance Drop Notes Microsoft patterns and practices What's in this Drop: Docs/CHM ** *DropLocation\CHM\SharePointGuidance.chm ...Persian Date/Time support for MsSQL: Build 59 (STABLE): Removed CreateDateTimeWmS() ! Use public static PersianDateTime CreateDateTime(int year, int month, int day, int hour, int min, int sec) instead. ...PiPiBugNet: 增加了创建新Bug界面: 增加了创建新Bug界面,尚未编写代码Rule 18 - Love your clipboard: Rule 18 (Beta version): This is the beta of the next release for Rule 18. Use if you feel comfortable with software that has minimal real world testing applied. Current...Scrum Sprint Monitor: v1.0.0.48591: What is new in this release? #6132 - Bug with open work hours; Added support for MSF for Agile process template; Improved data reporting in the...sGSHOPedit: sGSHOPedit v1.0 (Alpha): -SharePoint NNTP List Sync: 1.0 Release: You may need to change the posting server within the layouts, it is hard coded A webpart wsp is not provided because you should customize the sou...Silverlight Report Library: Version 2.0: - Upgraded to Silverlight 4.0 RTW - ReportHeader control added which is templateable - PagePrinting and PagePrinted events added - PageBreak ad...Snoop, the WPF Spy Utility: Snoop 2.5.1: This is a minor bug fix release for Snoop. In particular, I have fixed the installers so that they create separately named shortcuts ... for each ...SoulHackers Demon Unite(Chinese version): WCFTestClient: This program is using WCF and .NET 4.0. This version is include unite 2 and unite 3 and check what can unite. Element unite is not included yet.SqlServerExtensions: V 0.1 beta: Version 0.1 BetaStackOverflow.Net: StackOverflow.Net for Silverlight public beta: The beta version of StackOverflow.Net for silverlight 4StackOverflow.Net: StackOverflow.Net for Windows Phone 7 public beta: The Windows Phone 7 version of StackOverflow.netStackOverflow.Net: StackOverflow.Net public beta: A public beta to go along with with the public beta of the Stack Exchange APIStyleCop+: StyleCop+ 0.8: Added new extended rule for SA1502. SP1502 has an option which allows constructors to be placed on a single line.SynthExport: SynthExport 1.1.0: Added support for extraction of camera parameters The number of images in coordinate systems is now shown Added status label Improved user ex...TPager: TPager-20100521: First releaseVCC: Latest build, v2.1.30521.0: Automatic drop of latest buildWcfDoc: 1.0.5: Targeting .NET 4.0.Work Item Query Administration: 1.0: This is the first release an contains the following commands: list import export rename deleteMost Popular ProjectsRawrWBFS ManagerAJAX Control ToolkitMicrosoft SQL Server Product Samples: DatabaseSilverlight ToolkitWindows Presentation Foundation (WPF)patterns & practices – Enterprise LibraryPHPExcelMicrosoft SQL Server Community & SamplesASP.NETMost Active ProjectsRawrpatterns & practices – Enterprise Librarypatterns & practices: Windows Azure Security GuidanceCaliburn: An Application Framework for WPF and SilverlightSQL Server PowerShell ExtensionsGMap.NET - Great Maps for Windows Forms & PresentationBlogEngine.NETCodeReviewNB_Store - Free DotNetNuke Ecommerce Catalog ModulePHPExcel

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  • The fastest way to resize images from ASP.NET. And it’s (more) supported-ish.

    - by Bertrand Le Roy
    I’ve shown before how to resize images using GDI, which is fairly common but is explicitly unsupported because we know of very real problems that this can cause. Still, many sites still use that method because those problems are fairly rare, and because most people assume it’s the only way to get the job done. Plus, it works in medium trust. More recently, I’ve shown how you can use WPF APIs to do the same thing and get JPEG thumbnails, only 2.5 times faster than GDI (even now that GDI really ultimately uses WIC to read and write images). The boost in performance is great, but it comes at a cost, that you may or may not care about: it won’t work in medium trust. It’s also just as unsupported as the GDI option. What I want to show today is how to use the Windows Imaging Components from ASP.NET APIs directly, without going through WPF. The approach has the great advantage that it’s been tested and proven to scale very well. The WIC team tells me you should be able to call support and get answers if you hit problems. Caveats exist though. First, this is using interop, so until a signed wrapper sits in the GAC, it will require full trust. Second, the APIs have a very strong smell of native code and are definitely not .NET-friendly. And finally, the most serious problem is that older versions of Windows don’t offer MTA support for image decoding. MTA support is only available on Windows 7, Vista and Windows Server 2008. But on 2003 and XP, you’ll only get STA support. that means that the thread safety that we so badly need for server applications is not guaranteed on those operating systems. To make it work, you’d have to spin specialized threads yourself and manage the lifetime of your objects, which is outside the scope of this article. We’ll assume that we’re fine with al this and that we’re running on 7 or 2008 under full trust. Be warned that the code that follows is not simple or very readable. This is definitely not the easiest way to resize an image in .NET. Wrapping native APIs such as WIC in a managed wrapper is never easy, but fortunately we won’t have to: the WIC team already did it for us and released the results under MS-PL. The InteropServices folder, which contains the wrappers we need, is in the WicCop project but I’ve also included it in the sample that you can download from the link at the end of the article. In order to produce a thumbnail, we first have to obtain a decoding frame object that WIC can use. Like with WPF, that object will contain the command to decode a frame from the source image but won’t do the actual decoding until necessary. Getting the frame is done by reading the image bytes through a special WIC stream that you can obtain from a factory object that we’re going to reuse for lots of other tasks: var photo = File.ReadAllBytes(photoPath); var factory = (IWICComponentFactory)new WICImagingFactory(); var inputStream = factory.CreateStream(); inputStream.InitializeFromMemory(photo, (uint)photo.Length); var decoder = factory.CreateDecoderFromStream( inputStream, null, WICDecodeOptions.WICDecodeMetadataCacheOnLoad); var frame = decoder.GetFrame(0); We can read the dimensions of the frame using the following (somewhat ugly) code: uint width, height; frame.GetSize(out width, out height); This enables us to compute the dimensions of the thumbnail, as I’ve shown in previous articles. We now need to prepare the output stream for the thumbnail. WIC requires a special kind of stream, IStream (not implemented by System.IO.Stream) and doesn’t directlyunderstand .NET streams. It does provide a number of implementations but not exactly what we need here. We need to output to memory because we’ll want to persist the same bytes to the response stream and to a local file for caching. The memory-bound version of IStream requires a fixed-length buffer but we won’t know the length of the buffer before we resize. To solve that problem, I’ve built a derived class from MemoryStream that also implements IStream. The implementation is not very complicated, it just delegates the IStream methods to the base class, but it involves some native pointer manipulation. Once we have a stream, we need to build the encoder for the output format, which could be anything that WIC supports. For web thumbnails, our only reasonable options are PNG and JPEG. I explored PNG because it’s a lossless format, and because WIC does support PNG compression. That compression is not very efficient though and JPEG offers good quality with much smaller file sizes. On the web, it matters. I found the best PNG compression option (adaptive) to give files that are about twice as big as 100%-quality JPEG (an absurd setting), 4.5 times bigger than 95%-quality JPEG and 7 times larger than 85%-quality JPEG, which is more than acceptable quality. As a consequence, we’ll use JPEG. The JPEG encoder can be prepared as follows: var encoder = factory.CreateEncoder( Consts.GUID_ContainerFormatJpeg, null); encoder.Initialize(outputStream, WICBitmapEncoderCacheOption.WICBitmapEncoderNoCache); The next operation is to create the output frame: IWICBitmapFrameEncode outputFrame; var arg = new IPropertyBag2[1]; encoder.CreateNewFrame(out outputFrame, arg); Notice that we are passing in a property bag. This is where we’re going to specify our only parameter for encoding, the JPEG quality setting: var propBag = arg[0]; var propertyBagOption = new PROPBAG2[1]; propertyBagOption[0].pstrName = "ImageQuality"; propBag.Write(1, propertyBagOption, new object[] { 0.85F }); outputFrame.Initialize(propBag); We can then set the resolution for the thumbnail to be 96, something we weren’t able to do with WPF and had to hack around: outputFrame.SetResolution(96, 96); Next, we set the size of the output frame and create a scaler from the input frame and the computed dimensions of the target thumbnail: outputFrame.SetSize(thumbWidth, thumbHeight); var scaler = factory.CreateBitmapScaler(); scaler.Initialize(frame, thumbWidth, thumbHeight, WICBitmapInterpolationMode.WICBitmapInterpolationModeFant); The scaler is using the Fant method, which I think is the best looking one even if it seems a little softer than cubic (zoomed here to better show the defects): Cubic Fant Linear Nearest neighbor We can write the source image to the output frame through the scaler: outputFrame.WriteSource(scaler, new WICRect { X = 0, Y = 0, Width = (int)thumbWidth, Height = (int)thumbHeight }); And finally we commit the pipeline that we built and get the byte array for the thumbnail out of our memory stream: outputFrame.Commit(); encoder.Commit(); var outputArray = outputStream.ToArray(); outputStream.Close(); That byte array can then be sent to the output stream and to the cache file. Once we’ve gone through this exercise, it’s only natural to wonder whether it was worth the trouble. I ran this method, as well as GDI and WPF resizing over thirty twelve megapixel images for JPEG qualities between 70% and 100% and measured the file size and time to resize. Here are the results: Size of resized images   Time to resize thirty 12 megapixel images Not much to see on the size graph: sizes from WPF and WIC are equivalent, which is hardly surprising as WPF calls into WIC. There is just an anomaly for 75% for WPF that I noted in my previous article and that disappears when using WIC directly. But overall, using WPF or WIC over GDI represents a slight win in file size. The time to resize is more interesting. WPF and WIC get similar times although WIC seems to always be a little faster. Not surprising considering WPF is using WIC. The margin of error on this results is probably fairly close to the time difference. As we already knew, the time to resize does not depend on the quality level, only the size does. This means that the only decision you have to make here is size versus visual quality. This third approach to server-side image resizing on ASP.NET seems to converge on the fastest possible one. We have marginally better performance than WPF, but with some additional peace of mind that this approach is sanctioned for server-side usage by the Windows Imaging team. It still doesn’t work in medium trust. That is a problem and shows the way for future server-friendly managed wrappers around WIC. The sample code for this article can be downloaded from: http://weblogs.asp.net/blogs/bleroy/Samples/WicResize.zip The benchmark code can be found here (you’ll need to add your own images to the Images directory and then add those to the project, with content and copy if newer in the properties of the files in the solution explorer): http://weblogs.asp.net/blogs/bleroy/Samples/WicWpfGdiImageResizeBenchmark.zip WIC tools can be downloaded from: http://code.msdn.microsoft.com/wictools To conclude, here are some of the resized thumbnails at 85% fant:

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  • WPF Login Verification Using Active Directory

    - by psheriff
    Back in October of 2009 I created a WPF login screen (Figure 1) that just showed how to create the layout for a login screen. That one sample is probably the most downloaded sample we have. So in this blog post, I thought I would update that screen and also hook it up to show how to authenticate your user against Active Directory. Figure 1: Original WPF Login Screen I have updated not only the code behind for this login screen, but also the look and feel as shown in Figure 2. Figure 2: An Updated WPF Login Screen The UI To create the UI for this login screen you can refer to my October of 2009 blog post to see how to create the borderless window. You can then look at the sample code to see how I created the linear gradient brush for the background. There are just a few differences in this screen compared to the old version. First, I changed the key image and instead of using words for the Cancel and Login buttons, I used some icons. Secondly I added a text box to hold the Domain name that you wish to authenticate against. This text box is automatically filled in if you are connected to a network. In the Window_Loaded event procedure of the winLogin window you can retrieve the user’s domain name from the Environment.UserDomainName property. For example: txtDomain.Text = Environment.UserDomainName The ADHelper Class Instead of coding the call to authenticate the user directly in the login screen I created an ADHelper class. This will make it easier if you want to add additional AD calls in the future. The ADHelper class contains just one method at this time called AuthenticateUser. This method authenticates a user name and password against the specified domain. The login screen will gather the credentials from the user such as their user name and password, and also the domain name to authenticate against. To use this ADHelper class you will need to add a reference to the System.DirectoryServices.dll in .NET. The AuthenticateUser Method In order to authenticate a user against your Active Directory you will need to supply a valid LDAP path string to the constructor of the DirectoryEntry class. The LDAP path string will be in the format LDAP://DomainName. You will also pass in the user name and password to the constructor of the DirectoryEntry class as well. With a DirectoryEntry object populated with this LDAP path string, the user name and password you will now pass this object to the constructor of a DirectorySearcher object. You then perform the FindOne method on the DirectorySearcher object. If the DirectorySearcher object returns a SearchResult then the credentials supplied are valid. If the credentials are not valid on the Active Directory then an exception is thrown. C#public bool AuthenticateUser(string domainName, string userName,  string password){  bool ret = false;   try  {    DirectoryEntry de = new DirectoryEntry("LDAP://" + domainName,                                           userName, password);    DirectorySearcher dsearch = new DirectorySearcher(de);    SearchResult results = null;     results = dsearch.FindOne();     ret = true;  }  catch  {    ret = false;  }   return ret;} Visual Basic Public Function AuthenticateUser(ByVal domainName As String, _ ByVal userName As String, ByVal password As String) As Boolean  Dim ret As Boolean = False   Try    Dim de As New DirectoryEntry("LDAP://" & domainName, _                                 userName, password)    Dim dsearch As New DirectorySearcher(de)    Dim results As SearchResult = Nothing     results = dsearch.FindOne()     ret = True  Catch    ret = False  End Try   Return retEnd Function In the Click event procedure under the Login button you will find the following code that will validate the credentials that the user types into the login window. C#private void btnLogin_Click(object sender, RoutedEventArgs e){  ADHelper ad = new ADHelper();   if(ad.AuthenticateUser(txtDomain.Text,         txtUserName.Text, txtPassword.Password))    DialogResult = true;  else    MessageBox.Show("Unable to Authenticate Using the                      Supplied Credentials");} Visual BasicPrivate Sub btnLogin_Click(ByVal sender As Object, _ ByVal e As RoutedEventArgs)  Dim ad As New ADHelper()   If ad.AuthenticateUser(txtDomain.Text, txtUserName.Text, _                         txtPassword.Password) Then    DialogResult = True  Else    MessageBox.Show("Unable to Authenticate Using the                      Supplied Credentials")  End IfEnd Sub Displaying the Login Screen At some point when your application launches, you will need to display your login screen modally. Below is the code that you would call to display the login form (named winLogin in my sample application). This code is called from the main application form, and thus the owner of the login screen is set to “this”. You then call the ShowDialog method on the login screen to have this form displayed modally. After the user clicks on one of the two buttons you need to check to see what the DialogResult property was set to. The DialogResult property is a nullable type and thus you first need to check to see if the value has been set. C# private void DisplayLoginScreen(){  winLogin win = new winLogin();   win.Owner = this;  win.ShowDialog();  if (win.DialogResult.HasValue && win.DialogResult.Value)    MessageBox.Show("User Logged In");  else    this.Close();} Visual Basic Private Sub DisplayLoginScreen()  Dim win As New winLogin()   win.Owner = Me  win.ShowDialog()  If win.DialogResult.HasValue And win.DialogResult.Value Then    MessageBox.Show("User Logged In")  Else    Me.Close()  End IfEnd Sub Summary Creating a nice looking login screen is fairly simple to do in WPF. Using the Active Directory services from a WPF application should make your desktop programming task easier as you do not need to create your own user authentication system. I hope this article gave you some ideas on how to create a login screen in WPF. NOTE: You can download the complete sample code for this blog entry at my website: http://www.pdsa.com/downloads. Click on Tips & Tricks, then select 'WPF Login Verification Using Active Directory' from the drop down list. Good Luck with your Coding,Paul Sheriff ** SPECIAL OFFER FOR MY BLOG READERS **We frequently offer a FREE gift for readers of my blog. Visit http://www.pdsa.com/Event/Blog for your FREE gift!

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  • CodePlex Daily Summary for Sunday, November 27, 2011

    CodePlex Daily Summary for Sunday, November 27, 2011Popular ReleasesTerminals: Version 2 - Beta 4 Release: Beta 4 Refresh Build Dont forget to backup your config files BEFORE upgrading! As usual, please take time to use and abuse this release. We left logging in place, and this is a debug build so be sure to submit your logs on each bug reported, and please do report all bugs! Updated the About form to include the date and time of the build. Useful for CI builds to ensure we have the correct version "Favourites" and "History" save their expanded states after app restarts Code cleanup, secu...MiniTwitter: 1.76: MiniTwitter 1.76 ???? ?? ?????????? User Streams ???????????? User Streams ???????????、??????????????? REST ?????????? ?????????????????????????????? ??????????????????????????????Media Companion: MC 3.424b Weekly: Ensure .NET 4.0 Full Framework is installed. (Available from http://www.microsoft.com/download/en/details.aspx?id=17718) Ensure the NFO ID fix is applied when transitioning from versions prior to 3.416b. (Details here) Movie Show Resolutions... Resolved issue when reverting multiselection of movies to "-none-" Added movie rename support for subtitle files '.srt' & '.sub' Finalised code for '-1' fix - radiobutton to choose either filename or title Fixed issue with Movie Batch Wizard Fanart - ...Advanced Windows Phone Enginering Tool: WPE Downloads: This version of WPE gives you basic updating, restoring, and, erasing for your Windows Phone device.Anno 2070 Assistant: Beta v1.0 (STABLE): Anno 2070 Assistant Beta v1.0 Released! Features Included: Complete Building Layouts for Ecos, Tycoons & Techs Complete Production Chains for Ecos, Tycoons & Techs Completed Credits Screen Known Issues: Not all production chains and building layouts may be on the lists because they have not yet been discovered. However, data is still 99.9% complete. Currently the Supply & Demand, including Calculator screen are disabled until version 1.1.Minemapper: Minemapper v0.1.7: Including updated Minecraft Biome Extractor and mcmap to support the new Minecraft 1.0.0 release (new block types, etc).Visual Leak Detector for Visual C++ 2008/2010: v2.2.1: Enhancements: * strdup and _wcsdup functions support added. * Preliminary support for VS 11 added. Bugs Fixed: * Low performance after upgrading from VLD v2.1. * Memory leaks with static linking fixed (disabled calloc support). * Runtime error R6002 fixed because of wrong memory dump format. * version.h fixed in installer. * Some PVS studio warning fixed.NetSqlAzMan - .NET SQL Authorization Manager: 3.6.0.10: 3.6.0.10 22-Nov-2011 Update: Removed PreEmptive Platform integration (PreEmptive analytics) Removed all PreEmptive attributes Removed PreEmptive.dll assembly references from all projects Added first support to ADAM/AD LDS Thanks to PatBea. Work Item 9775: http://netsqlazman.codeplex.com/workitem/9775VideoLan DotNet for WinForm, WPF & Silverlight 5: VideoLan DotNet for WinForm, WPF, SL5 - 2011.11.22: The new version contains Silverlight 5 library: Vlc.DotNet.Silverlight. A sample could be tested here The new version add and correct many features : Correction : Reinitialize some variables Deprecate : Logging API, since VLC 1.2 (08/20/2011) Add subitem in LocationMedia (for Youtube videos, ...) Update Wpf sample to use Youtube videos Many others correctionsEZ-NFC: Alpha 1: THIS IS AN ALPHA RELEASE. STILL UNSTABLE AND SUBJECT TO ARCHITECTURE CHANGE What is implemented (In alpha) : ACR122L Device Mifare 1K tag Windows frontend#liveDB: liveDB 0.3.2: New featuresNew abstract storage scheme enabling future cloud support New file system structure and naming scheme for snapshots and journal files based on sequence numbers Journal files are never deleted Automatic snapshots during load or shutdown Renamed/added hooks to Model JournalRestored, SnapshotRestored Created an extensible logging facade Journal gets split into 1MB segments (configurable) Integrity checks before during load/create Commands are cloned by default before ...ReactiveMVVM: ReactiveMVVM v1.0: Example 1 property change: public class Example1 : ViewModelBase{ string _Userid; /// <summary> /// person infomation of owner. /// </summary> public string Userid { get { return _Userid; } set { this.RaiseAndSetIfChanged(x => x.Userid, ref _Userid, value, *true*); } // true, broadcast property change message. } //if the property changed to do...... this.ObservableProperty(x => x.Useid) ...IoCWrap: Initial: Initial release of the source code.Code for Rapid C# Windows Development eBook + LINQPad and Data Tools: LinqPad Custom Visualizer Version 1.0: First release of my LinqPad Custom Visualizer. It is compiled against the Any-CPU build of LINQPad v4.36.6 so it can only be used with the LINQPad Beta: v4.36.x. To install unzip to the LinqPad plugins folder.Distributed replay GUI: Distributed Replay Snapin: This is the dll for registering the snapin in mmc.FaST-LMM: FActored Spectrally Transformed Linear Mixed Models: FaSTLMM v1.03 Binaries for Windows and Linux: These files contain the files necessary to run FaSTLMM on Windows or Linux along with the license and users manual. To download FaSTLMM source code, please follow the changeset link located above to the Source Code tab. The FaSTLMM.Win.zip download contains both C++ and CSharp executable versions of FaSTLMM. No installer is required, just UnZip the file into a directory and run from there. Or put the installation directory on your path and run it from anywhere. The C++ version included r...SharePoint 2010 FBA Pack: SharePoint 2010 FBA Pack 1.2.0: Web parts are now fully customizable via html templates (Issue #323) FBA Pack is now completely localizable using resource files. Thank you David Chen for submitting the code as well as Chinese translations of the FBA Pack! The membership request web part now gives the option of having the user enter the password and removing the captcha (Issue # 447) The FBA Pack will now work in a zone that does not have FBA enabled (Another zone must have FBA enabled, and the zone must contain the me...SharePoint 2010 Education Demo Project: Release SharePoint SP1 for Education Solutions: This release includes updates to the Content Packs for SharePoint SP1. All Content Packs have been updated to install successfully under SharePoint SP1SQL Monitor - managing sql server performance: SQLMon 4.1 alpha 6: 1. improved support for schema 2. added find reference when right click on object list 3. added object rename supportBugNET Issue Tracker: BugNET 0.9.126: First stable release of version 0.9. Upgrades from 0.8 are fully supported and upgrades to future releases will also be supported. This release is now compiled against the .NET 4.0 framework and is a requirement. Because of this the web.config has significantly changed. After upgrading, you will need to configure the authentication settings for user registration and anonymous access again. Please see our installation / upgrade instructions for more details: http://wiki.bugnetproject.c...New Projectsandrewtatham.robocode: Andrew Tatham's Robocode botsClear SharePoint Lists: This project contains the tools used to clear the items from the one or more Lists.Clipboard Editor: How many times have you pasted something in Notepad and then copied the plain text again? We do it all the time to strip formatting from the clipboard. This utility lets you pick which format from the clipboard to keep.CS New Rus: ?? ????? ??????????? ??????. ??? ??? - CS New. ?? ???? ????? ?? ????? ??????????? ??? ? ?????????? ? ???????. ElfDoc: ElfDoc enables you to create word documents from templates, using open xml.HTC RUU .NET: HTC's legendary RUU goes .NET and Open Source.................. You can browse for .nbh file, not locked at current directory and, you can update your device's rom in .NET wayMobileGamePrototype: For now just a skeleton of the architecture.NopCommerce 23 Multi Store Support: NopCommerce 23 Multi Store Support novel: fetch novelOrchard Custom Shapes: Ready to use custom orchard shapes like a table shape.Philosophy Gadget: This gadget helps people associate known works of philosophy with their known authors.ReefTracker: A controller agnostic logging and reporting application for reef aquarium controllers. SQLQuery: SQL QueryWindows Phone Marketplace Viewer: Windows Phone Marketplace Viewer is a single aspx page for asp.net 3+ with no additional dependencies. It will show the top 2000 apps in one of the 3 categories: paid and free together, only paid or only free, for all the marketplace languages.

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  • CodePlex Daily Summary for Tuesday, September 04, 2012

    CodePlex Daily Summary for Tuesday, September 04, 2012Popular ReleasesPE file reader: READPE-e9ff717a638d.zip: Introduced some new code which parses the IMAGENTHEADERS. At the moment the command line options dosheader and imagentheaders are working and and example of their usage can be... D:\>readpe pe-files\main.exe dosheader imagentheadersMicrosoft Ajax Minifier: Microsoft Ajax Minifier 4.64: Another attempt to fix the fiasco that was my bad decision to rename the DLLs to get away from a strong-name collision that was causing lots of problems for me. Too many existing projects expected AjaxMin.dll, and lots of things broke downstream from me. This release keeps the .net 2.0 version named AjaxMin.dll. The new .net 3.5 and .net 4.0 versions are named AjaxMinLibrary.dll. If an existing project is expecting the old name, they should continue to pick up the .net 2.0 version (since the ...Nearforums - ASP.NET MVC forum engine: Nearforums v8.5: Version 8.5 of Nearforums, the ASP.NET MVC Forum Engine. New features include: Built-in search engine using Lucene.NET Flood control improvements Notifications improvements: sync option and mail body View Roadmap for more details webdeploy package sha1 checksum: 961aff884a9187b6e8a86d68913cdd31f8deaf83NWebsec: NWebsec 1.0.3: This release fixes two bugs in the NWebsec.Mvc package. Go get it on NuGet! http://nuget.org/packages/NWebsec.Mvc/ These work items made it into the release: 9 10 Check out the Documentation to learn how it works. This release has been tagged v1.0.3 in source control. Enjoy!RBAC Manager R2 for Exchange 2010 SP2, Exchange 2013 Preview and Office 365: RBAC Manager R2 1.5.5.0: now supports to manage RBAC on Office 365 'remember password' feature now saves the password as encrypted as opposed to plain-text format in version 1.5.0.0 DPAPI is used to encrypt the saved password; for more information about DPAPI please check: Managed DPAPI Part I: ProtectedData http://blogs.msdn.com/b/shawnfa/archive/2004/05/05/126825.aspx The tool requires HTTP/HTTPS network connection to the Exchange server Known Bugs: Active Directory lookup is not working remotely and crashes the ...WiX Toolset: WiX Toolset v3.6: WiX Toolset v3.6 introduces the Burn bootstrapper/chaining engine and support for Visual Studio 2012 and .NET Framework 4.5. Other minor functionality includes: WixDependencyExtension supports dependency checking among MSI packages. WixFirewallExtension supports more features of Windows Firewall. WixTagExtension supports Software Id Tagging. WixUtilExtension now supports recursive directory deletion. Melt simplifies pure-WiX patching by extracting .msi package content and updating .w...Iveely Search Engine: Iveely Search Engine (0.2.0): ????ISE?0.1.0??,?????,ISE?0.2.0?????????,???????,????????20???follow?ISE,????,??ISE??????????,??????????,?????????,?????????0.2.0??????,??????????。 Iveely Search Engine ?0.2.0?????????“??????????”,??????,?????????,???????,???????????????????,????、????????????。???0.1.0????????????: 1. ??“????” ??。??????????,?????????,???????????????????。??:????????,????????????,??????????????????。??????。 2. ??“????”??。?0.1.0??????,???????,???????????????,?????????????,????????,?0.2.0?,???????...GmailDefaultMaker: GmailDefaultMaker 3.0.0.2: Add QQ Mail BugfixSmart Data Access layer: Smart Data access Layer Ver 3: In this version support executing inline query is added. Check Documentation section for detail.Dynamics AX Build Scripts: AX TFS Build Library Beta - v0.2.0.0: Beta release of TFS 2010 workflow code activities for AX 2009 and AX 2012. Build template for AX 2012 included. There is one refactor of code that will break your existing workflows. The AOS workflow step to stop/start AOS now expects the actual windows service name, not the port number of the AOS. There now is a new step to retrieve server settings, which can get the service identifier based on the port number. The registry has to be read to retrieve these settings, and we didn't want to ke...Cosmo OS: Cosmo OS Lama Preview: Info Sulla Release Lama Preview ( Prima Preview Pubblica ) Data Di Rilascio: 2 / 09 / 12 Build: 1950 Ramo Di Sviluppo: cosmo_os.preview.lama.bid1535543 Tipo Release: Stable / PreviewNETDeob0: NETDeob 0.3.1 BETA binaries: 0.3.1Custom Captcha Plugin for Kooboo CMS for adding content or sending feedback: Custom Captcha Validator Plugin v1.1 for Kooboo: Download file CustomCaptchaValidatorPlugin.dll and install it to KooBoo CMS. Release 1.1: Fixed error: "A generic error occurred in GDI+" (if hosting is less than Windows Server 2008 or Windows 7) - http://forum.kooboo.com/yafpostsm6602Custom-captcha---any-best-practice.aspx#post6602TSQL Code Smells Finder: POC 1.01: Proof of concept 1.01 TSQLDomTest.ps1 and Errors.Txt are requiredSaturn Kinect: Saturn Kinect + Sample Applications - Release 3: This release includes : - Saturn Kinect Library - Kinect Motion Capture Application - Controlling mouse cursor sample - Hand swip detection sample + Source CodesDiscuzViet: DiscuzX2.5_02092012_Vietnam: DiscuzX2.502092012VietnamBookmark Collector: 01.00.00: This is the first release with a minimal feature set. You can save, edit, delete, and display a list of URLs from various sites.EntLib.com????????: EntLib.com???????? v3.0: EntLib eCommerce Solution ???Microsoft .Net Framework?????????????????????。Coevery - Free CRM: Coevery 1.0.0.24: Add a sample database, and installation instructions.Math.NET Numerics: Math.NET Numerics v2.2.1: Major linear algebra rework since v2.1, now available on Codeplex as well (previous versions were only available via NuGet). Since v2.2.0: Student-T density more robust for very large degrees of freedom Sparse Kronecker product much more efficient (now leverages sparsity) Direct access to raw matrix storage implementations for advanced extensibility Now also separate package for signed core library with a strong name (we dropped strong names in v2.2.0) Also available as NuGet packages...New ProjectsAction Bar: Action Bar is a SNS network based on activities.async/await C# Samples: Project demonstrating new C# feature - async and await. You can find here several solutions to make UI calls asynchronous: APM, EAP and async.Attribute Based Xaml Generator: Dynamic Xaml UI Generator and Editor Just point it to a dll or an exe and then navigate through your namespaces to your classB INI Sharp Library: Full support for INI files.brevis nopCommerce Extensions: Extensions for nopCommerce open soruce e-commerce solution (several Versions). !Contents nop 1.90 fpr testing the new Lib! This will be removed after 1. releaseConEmu - Windows console with tabs: ConEmu (short for Console Emulator) is a console window and tabbed environment for Windows. Tabs, Fonts, Quake style, Transparency and hundreds of other optionsContrib.Mod.AccountWidgets: Orchard module for adding login and registration widgetsCSharp GUI for Mono: This is an application which makes use of "Mono" to execute CSharp programs. It provides a graphical user interface to run the CSharp program. DocCollection: ???????????????http://www.qlili.comfanpages: Fanatics!ISIS Associations Manager: Application Web permettant la gestion d'Associations. (Membres, Emailing, Calendier)LogMan: ????????????b/s??,??python?? require: web.pyLucifure Stash - Azure Table Storage Client: Lucifure Stash is an alternate Azure table storage client, which supports arrays, enumerations, large data > 64KB, serialization, morphing and more.Mod.EverlastingLogin: Orchard module to allow a user to stay logged in for a certain amount of time using cookiesPHP Extra Functions: PHP Extra Functions is a suite of functions that extend common libraries with easy to use functions. For example, functions are added to MySQLi to simplify use.Raise events controlled: This is an example of raising you events controlled (with exception handling)sb0t v.5: sb0t 5 development page.SharePoint Mobile OA Platform: Via mobile device, by using the SharePoint Mobile Support, Web Service, Client OM, WCF Data Service bring about mobile office.Simple Guestbook: I just want to share simple code, may be will be helpful for newbies.SimplyWeather2.gadget: A neat little weather gadget for your Windows Desktop.Tanks: Required summary is hereUtility Project: Utilities ProjectWindows Phone: The goal of this project is to improve my skills in Windows Phonewords: ?????????Wpf Testing Lib: This is a project for auto testing wpf appswtstudy: wtstudy

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  • CodePlex Daily Summary for Monday, August 27, 2012

    CodePlex Daily Summary for Monday, August 27, 2012Popular ReleasesHome Access Plus+: v8.0: v8.0827.1800 RELEASE CHANGED TO BETA Any issues, please log them on http://www.edugeek.net/forums/home-access-plus/ This is full release, NO upgrade ZIP will be provided as most files require replacing. To upgrade from a previous version, delete everything but your AppData folder, extract all but the AppData folder and run your HAP+ install Documentation is supplied in the Web Zip The Quota Services require executing a script to register the service, this can be found in there install di...Math.NET Numerics: Math.NET Numerics v2.2.0: Major linear algebra rework since v2.1, now available on Codeplex as well (previous versions were only available via NuGet). Also available as NuGet packages: PM> Install-Package MathNet.Numerics PM> Install-Package MathNet.Numerics.FSharp New: instead of the special Silverlight build we now provide a portable version supporting .Net 4, Silverlight 5 and .Net Core (WinRT) 4.5: PM> Install-Package MathNet.Numerics.PortableMetodología General Ajustada - MGA: 03.00.08: Cambios Aury: Cambios realizados en el reporte de la MGA: Errores en la generación cuando se seleccionan todas las opciones y Que sólo se imprima la información de la alternativa seleccionada para el proyecto. Cambios John: Integración de código con cambios enviados por Aury Niño. Generación de instaladores. Soporte técnico por correo electrónico y telefónico.Phalanger - The PHP Language Compiler for the .NET Framework: 3.0.0.3391 (September 2012): New features: Extended ReflectionClass libxml error handling, constants TreatWarningsAsErrors MSBuild option OnlyPrecompiledCode configuration option; allows to use only compiled code Fixes: ArgsAware exception fix accessing .NET properties bug fix ASP.NET session handler fix for OutOfProc mode Phalanger Tools for Visual Studio: Visual Studio 2010 & 2012 New debugger engine, PHP-like debugging Lot of fixes of project files, formatting, smart indent, colorization etc. Improved ...WatchersNET CKEditor™ Provider for DotNetNuke®: CKEditor Provider 1.14.06: Whats New Added CKEditor 3.6.4 oEmbed Plugin can now handle short urls changes The Template File can now parsed from an xml file instead of js (More Info...) Style Sets can now parsed from an xml file instead of js (More Info...) Fixed Showing wrong Pages in Child Portal in the Link Dialog Fixed Urls in dnnpages Plugin Fixed Issue #6969 WordCount Plugin Fixed Issue #6973 File-Browser: Fixed Deleting of Files File-Browser: Improved loading time File-Browser: Improved the loa...MabiCommerce: MabiCommerce 1.0.1: What's NewSetup now creates shortcuts Fix spelling errors Minor enhancement to the Map window.ScintillaNET: ScintillaNET 2.5.2: This release has been built from the 2.5 branch. Version 2.5.2 is functionally identical to the 2.5.1 release but also includes the XML documentation comments file generated by Visual Studio. It is not 100% comprehensive but it will give you Visual Studio IntelliSense for a large part of the API. Just make sure the ScintillaNET.xml file is in the same folder as the ScintillaNET.dll reference you're using in your projects. (The XML file does not need to be distributed with your application)....TouchInjector: TouchInjector 1.1: Version 1.1: fixed a bug with the autorun optionWinRT XAML Toolkit: WinRT XAML Toolkit - 1.2.0: WinRT XAML Toolkit based on the Windows 8 RTM SDK. Download the latest source from the SOURCE CODE page. For compiled version use NuGet. You can add it to your project in Visual Studio by going to View/Other Windows/Package Manager Console and entering: PM> Install-Package winrtxamltoolkit Features AsyncUI extensions Controls and control extensions Converters Debugging helpers Imaging IO helpers VisualTree helpers Samples Recent changes NOTE: Namespace changes DebugConsol...BlackJumboDog: Ver5.7.1: 2012.08.25 Ver5.7.1 (1)?????·?????LING?????????????? (2)SMTP???(????)????、?????\?????????????????????Christoc's DotNetNuke Module Development Template: 00.00.09 for DNN6: Probably the final VS2010 Release as I have some new VS2012 templates coming. BEFORE USE YOU need to install the MSBuild Community Tasks available from https://github.com/loresoft/msbuildtasks/downloads For best results you should configure your development environment as described in this blog post Then read this latest blog post about customizing and using these custom templates. Installation is simple To use this template place the ZIP (not extracted) file in your My Documents\Visual ...Visual Studio Team Foundation Server Branching and Merging Guide: v2 - Visual Studio 2012: Welcome to the Branching and Merging Guide Quality-Bar Details Documentation has been reviewed by Visual Studio ALM Rangers Documentation has been through an independent technical review Documentation has been reviewed by the quality and recording team All critical bugs have been resolved Known Issues / Bugs Spelling, grammar and content revisions are in progress. Hotfix will be published.Microsoft Ajax Minifier: Microsoft Ajax Minifier 4.62: Fix for issue #18525 - escaped characters in CSS identifiers get double-escaped if the character immediately after the backslash is not normally allowed in an identifier. fixed symbol problem with nuget package. 4.62 should have nuget symbols available again. Also want to highlight again the breaking change introduced in 4.61 regarding the renaming of the DLL from AjaxMin.dll to AjaxMinLibrary.dll to fix strong-name collisions between the DLL and the EXE. Please be aware of this change and...nopCommerce. Open source shopping cart (ASP.NET MVC): nopcommerce 2.65: As some of you may know we were planning to release version 2.70 much later (the end of September). But today we have to release this intermediate version (2.65). It fixes a critical issue caused by a third-party assembly when running nopCommerce on a server with .NET 4.5 installed. No major features have been introduced with this release as our development efforts were focused on further enhancements and fixing bugs. To see the full list of fixes and changes please visit the release notes p...MyRouter (Virtual WiFi Router): MyRouter 1.2.9: . Fix: Some missing changes for fixing the window subclassing crash. · Fix: fixed bug when Run MyRouter at the first Time. · Fix: Log File · Fix: improve performance speed application · fix: solve some Exception.TFS Project Test Migrator: TestPlanMigration v1.0.0: Release 1.0.0 This first version do not create the test cases in the target project because the goal was to restore a Test Plan + Test Suite hierarchy after a manual user deletion without restoring all the Project Collection Database. As I discovered, deleting a Test Plan will do the following : - Delete all TestSuiteEntry (the link between a Test Suite node and a Test Case) - Delete all TestSuite (the nodes in the test hierarchy), including root TestSuite - Delete the TestPlan Test c...ERPStore eCommerce FrontOffice: ERPStore.Core V4.0.0.2 MVC4 RTM: ERPStore.Core V4.0.0.2 MVC4 RTM (Code Source)ZXing.Net: ZXing.Net 0.8.0.0: sync with rev. 2393 of the java version improved API, direct support for multiple barcode decoding, wrapper for barcode generating many other improvements and fixes encoder and decoder command line clients demo client for emguCV dev documentation startedMFCMAPI: August 2012 Release: Build: 15.0.0.1035 Full release notes at SGriffin's blog. If you just want to run the MFCMAPI or MrMAPI, get the executables. If you want to debug them, get the symbol files and the source. The 64 bit builds will only work on a machine with Outlook 2010 64 bit installed. All other machines should use the 32 bit builds, regardless of the operating system. Facebook BadgePulse: Pulse Beta 5: Whats new in this release? Well to start with we now have Wallbase.cc Authentication! so you can access favorites or NSFW. This version requires .NET 4.0, you probably already have it, but if you don't it's a free and easy download from Microsoft. Pulse can bet set to start on Windows startup now too. The Wallpaper setter has settings now, so you can change the background color of the desktop and the Picture Position (Tile/Center/Fill/etc...) I've switched to Windows Forms instead of WPF...New ProjectsAStar Sample WPF Application by Ben Scharbach: The A* Pathfinding component contains an A* Manager, with three A* path finding engines, allowing for 3 simultaneous path searches on PC and XBOX. - By BenContactor: Programs and Schematics for sending a Short Message Service from a computer.JCI Page: gfdsgfdsgfdsL-Calc: Przykladowy kalkulator liczacy indukcyjnosc poprzez odczyt czestotliwosci obwodu rezonansowego.LibXmlSocket: XmlSocket LibraryNavegar: WPF Navigation pour MVVM Light et SimpleIocNUnit Comparisons: A set of libraries which extend the NUnit constraint framework to support deeper comparisons and report detailed differences useful to test debugging. ORMAC: ORMAC is a micro .NET ORM PersonalDataCenter: PDCNet1Project WarRoom: An experimental chatroom jQuery widget for instant messaging functionality on web applications.Quantum.Net: Quantum.Net is a free computation library developp in C#. Contains some mathematics functions and physical element.Specification Framework: A small framework to get started with a type safe variation of the specification pattern.Sphere Community: Sphere Community Pack 2.0TouchInjector: Generate Windows 8 Touch from TUIO messages.

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  • CodePlex Daily Summary for Tuesday, June 18, 2013

    CodePlex Daily Summary for Tuesday, June 18, 2013Popular ReleasesCODE Framework: 4.0.30618.0: See change notes in the documentation section for details on what's new. Note: If you download the class reference help file with, you have to right-click the file, pick "Properties", and then unblock the file, as many browsers flag the file as blocked during download (for security reasons) and thus hides all content.Toolbox for Dynamics CRM 2011: XrmToolBox (v1.2013.6.18): XrmToolbox improvement Use new connection controls (use of Microsoft.Xrm.Client.dll) New display capabilities for tools (size, image and colors) Added prerequisites check Added Most Used Tools feature Tools improvementNew toolSolution Transfer Tool (v1.0.0.0) developed by DamSim Updated toolView Layout Replicator (v1.2013.6.17) Double click on source view to display its layoutXml All tools list Access Checker (v1.2013.6.17) Attribute Bulk Updater (v1.2013.6.18) FetchXml Tester (v1.2013.6.1...Media Companion: Media Companion MC3.570b: New* Movie - using XBMC TMDB - now renames movies if option selected. * Movie - using Xbmc Tmdb - Actor images saved from TMDb if option selected. Fixed* Movie - Checks for poster.jpg against missing poster filter * Movie - Fixed continual scraping of vob movie file (not DVD structure) * Both - Correctly display audio channels * Both - Correctly populate audio info in nfo's if multiple audio tracks. * Both - added icons and checked for DTS ES and Dolby TrueHD audio tracks. * Both - Stream d...LINQ Extensions Library: 1.0.4.2: New to release 1.0.4.2 Custom sorting extensions that perform up to 50% better than LINQ OrderBy, ThenBy extensions... Extensions allow for fine tuning of the sort by controlling the algorithm each sort uses.ExtJS based ASP.NET Controls: FineUI v3.3.0: ??FineUI ?? ExtJS ??? ASP.NET ???。 FineUI??? ?? No JavaScript,No CSS,No UpdatePanel,No ViewState,No WebServices ???????。 ?????? IE 7.0、Firefox 3.6、Chrome 3.0、Opera 10.5、Safari 3.0+ ???? Apache License v2.0 ?:ExtJS ?? GPL v3 ?????(http://www.sencha.com/license)。 ???? ??:http://fineui.com/bbs/ ??:http://fineui.com/demo/ ??:http://fineui.com/doc/ ??:http://fineui.codeplex.com/ FineUI???? ExtJS ?????????,???? ExtJS ?。 ????? FineUI ? ExtJS ?:http://fineui.com/bbs/forum.php?mod=viewthrea...BarbaTunnel: BarbaTunnel 8.0: Check Version History for more information about this release.ExpressProfiler: ExpressProfiler v1.5: [+] added Start time, End time event columns [+] added SP:StmtStarting, SP:StmtCompleted events [*] fixed bug with Audit:Logout eventpatterns & practices: Data Access Guidance: Data Access Guidance Drop4 2013.06.17: Drop 4Microsoft Ajax Minifier: Microsoft Ajax Minifier 4.94: add dstLine and dstCol attributes to the -Analyze output in XML mode. un-combine leftover comma-separates expression statements after optimizations are complete so downstream tools don't stack-overflow on really deep comma trees. add support for using a single source map generator instance with multiple runs of MinifyJavaScript, assuming that the results are concatenated to the same output file.Kooboo CMS: Kooboo CMS 4.1.1: The stable release of Kooboo CMS 4.1.0 with fixed the following issues: https://github.com/Kooboo/CMS/issues/1 https://github.com/Kooboo/CMS/issues/11 https://github.com/Kooboo/CMS/issues/13 https://github.com/Kooboo/CMS/issues/15 https://github.com/Kooboo/CMS/issues/19 https://github.com/Kooboo/CMS/issues/20 https://github.com/Kooboo/CMS/issues/24 https://github.com/Kooboo/CMS/issues/43 https://github.com/Kooboo/CMS/issues/45 https://github.com/Kooboo/CMS/issues/46 https://github....VidCoder: 1.5.0 Beta: The betas have started up again! If you were previously on the beta track you will need to install this to get back on it. That's because you can now run both the Beta and Stable version of VidCoder side-by-side! Note that the OpenCL and Intel QuickSync changes being tested by HandBrake are not in the betas yet. They will appear when HandBrake integrates them into the main branch. Updated HandBrake core to SVN 5590. This adds a new FDK AAC encoder. The FAAC encoder has been removed and now...Employee Info Starter Kit: v6.0 - ASP.NET MVC Edition: Release Home - Getting Started - Hands on Coding Walkthrough – Technology Stack - Design & Architecture EISK v6.0 – ASP.NET MVC edition bundles most of the greatest and successful platforms, frameworks and technologies together, to enable web developers to learn and build manageable and high performance web applications with rich user experience effectively and quickly. User End SpecificationsCreating a new employee record Read existing employee records Update an existing employee reco...OLAP PivotTable Extensions: Release 0.8.1: Use the 32-bit download for... Excel 2007 Excel 2010 32-bit (even Excel 2010 32-bit on a 64-bit operating system) Excel 2013 32-bit (even Excel 2013 32-bit on a 64-bit operating system) Use the 64-bit download for... Excel 2010 64-bit Excel 2013 64-bit Just download and run the EXE. There is no need to uninstall the previous release. If you have problems getting the add-in to work, see the Troubleshooting Installation wiki page. The new features in this release are: View #VALUE! Err...DirectXTex texture processing library: June 2013: June 15, 2013 Custom filtering implementation for Resize & GenerateMipMaps(3D) - Point, Box, Linear, Cubic, and Triangle TEX_FILTER_TRIANGLE finite low-pass triangle filter TEX_FILTER_WRAP, TEX_FILTER_MIRROR texture semantics for custom filtering TEX_FILTER_BOX alias for TEX_FILTER_FANT WIC Ordered and error diffusion dithering for non-WIC conversion sRGB gamma correct custom filtering and conversion DDS_FLAGS_EXPAND_LUMINANCE - Reader conversion option for L8, L16, and A8L8 legacy ...WPF Application Framework (WAF): WPF Application Framework (WAF) 3.0.0.440: Version: 3.0.0.440 (Release Candidate): This release contains the source code of the WPF Application Framework (WAF) and the sample applications. Please build the whole solution before you start one of the sample applications. Requirements .NET Framework 4.5 (The package contains a solution file for Visual Studio 2012) Changelog Legend: [B] Breaking change; [O] Marked member as obsolete Samples: Use ValueConverters via StaticResource instead of x:Static. Other Downloads Downloads OverviewBlackJumboDog: Ver5.9.1: 2013.06.13 Ver5.9.1 (1) Web??????SSI?#include???、CGI?????????????????????? (2) ???????????????????????????Lakana - WPF Framework: Lakana V2.1 RTM: - Dynamic text localization - A new application wide message busFree language translator and file converter: Free Language Translator 3.3: some bug fixes and a new link to video tutorials on Youtube.Pokemon Battle Online: ETV: ETV???2012?12??????,????,???????$/PBO/branches/PrivateBeta??。 ???????bug???????。 ???? Server??????,?????。 ?????????,?????????????,?????????。 ????????,????,?????????,???????????(??)??。 ???? ????????????。 ???????。 ???PP????,????????????????????PP????,??3。 ?????????????,??????????。 ???????? ??? ?? ???? ??? ???? ?? ?????????? ?? ??? ??? ??? ???????? ???? ???? ???????????????、???????????,??“???????”??。 ???bug ???Modern UI for WPF: Modern UI 1.0.4: The ModernUI assembly including a demo app demonstrating the various features of Modern UI for WPF. Related downloads NuGet ModernUI for WPF is also available as NuGet package in the NuGet gallery, id: ModernUI.WPF Download Modern UI for WPF Templates A Visual Studio 2012 extension containing a collection of project and item templates for Modern UI for WPF. The extension includes the ModernUI.WPF NuGet package. DownloadNew ProjectsAux Browser: This browser is secured by system level sandbox technology, and it helps you get where you want to go in the shortest possible time. Best solution to convert Outlook OST to PST files: Convert OST to PST without fearing for data loss. An immaculate converter by Recover Data gives user a privilege to perform OST file recovery with no data loss.Bitbucket.NET: A high-performance .NET library for developing applications that use the Bitbucket service.caosu: aaaChartApp: Chart App for SharePoint 2013Custom Membership Provider SQL + LDAP with one login page: Custom membership provider to allow users to login to there portal from one login page whether its custom SQLDB or the current Active Directory.DroidBrowse: Web browser for Android 1.6 or later.haseebtestProject: This project is created to add random files and for testing purposesHiveSense: Hive monitoring system.JQuery File Upload Plugin with Backload server side component (Demo/Examples): Backload is a professional, full featured ASP.NET MVC 4 file upload controller and handler (server side). JSLocator: Locate javascript functions in the sourceMoonCMS: This is a trivial thing. It doesn't make any sense!MyLabs: MyLabs is Private Labpcvvpes: pcvvpesPrism Model Factory Extensions: Micro framework for model cloning, equality check and mergingSharePoint 2007 Solution and Packaging Guidance: WSPSolution is a standard for building SP 2007 solutions in Visual Studio, namespace planning, deployment planning, WSP creation, and build automation.Windows Phone Wi-Fi Launcher: Wi-Fi settings page launcher for Windows Phone 8.0

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  • Table Variables: an empirical approach.

    - by Phil Factor
    It isn’t entirely a pleasant experience to publish an article only to have it described on Twitter as ‘Horrible’, and to have it criticized on the MVP forum. When this happened to me in the aftermath of publishing my article on Temporary tables recently, I was taken aback, because these critics were experts whose views I respect. What was my crime? It was, I think, to suggest that, despite the obvious quirks, it was best to use Table Variables as a first choice, and to use local Temporary Tables if you hit problems due to these quirks, or if you were doing complex joins using a large number of rows. What are these quirks? Well, table variables have advantages if they are used sensibly, but this requires some awareness by the developer about the potential hazards and how to avoid them. You can be hit by a badly-performing join involving a table variable. Table Variables are a compromise, and this compromise doesn’t always work out well. Explicit indexes aren’t allowed on Table Variables, so one cannot use covering indexes or non-unique indexes. The query optimizer has to make assumptions about the data rather than using column distribution statistics when a table variable is involved in a join, because there aren’t any column-based distribution statistics on a table variable. It assumes a reasonably even distribution of data, and is likely to have little idea of the number of rows in the table variables that are involved in queries. However complex the heuristics that are used might be in determining the best way of executing a SQL query, and they most certainly are, the Query Optimizer is likely to fail occasionally with table variables, under certain circumstances, and produce a Query Execution Plan that is frightful. The experienced developer or DBA will be on the lookout for this sort of problem. In this blog, I’ll be expanding on some of the tests I used when writing my article to illustrate the quirks, and include a subsequent example supplied by Kevin Boles. A simplified example. We’ll start out by illustrating a simple example that shows some of these characteristics. We’ll create two tables filled with random numbers and then see how many matches we get between the two tables. We’ll forget indexes altogether for this example, and use heaps. We’ll try the same Join with two table variables, two table variables with OPTION (RECOMPILE) in the JOIN clause, and with two temporary tables. It is all a bit jerky because of the granularity of the timing that isn’t actually happening at the millisecond level (I used DATETIME). However, you’ll see that the table variable is outperforming the local temporary table up to 10,000 rows. Actually, even without a use of the OPTION (RECOMPILE) hint, it is doing well. What happens when your table size increases? The table variable is, from around 30,000 rows, locked into a very bad execution plan unless you use OPTION (RECOMPILE) to provide the Query Analyser with a decent estimation of the size of the table. However, if it has the OPTION (RECOMPILE), then it is smokin’. Well, up to 120,000 rows, at least. It is performing better than a Temporary table, and in a good linear fashion. What about mixed table joins, where you are joining a temporary table to a table variable? You’d probably expect that the query analyzer would throw up its hands and produce a bad execution plan as if it were a table variable. After all, it knows nothing about the statistics in one of the tables so how could it do any better? Well, it behaves as if it were doing a recompile. And an explicit recompile adds no value at all. (we just go up to 45000 rows since we know the bigger picture now)   Now, if you were new to this, you might be tempted to start drawing conclusions. Beware! We’re dealing with a very complex beast: the Query Optimizer. It can come up with surprises What if we change the query very slightly to insert the results into a Table Variable? We change nothing else and just measure the execution time of the statement as before. Suddenly, the table variable isn’t looking so much better, even taking into account the time involved in doing the table insert. OK, if you haven’t used OPTION (RECOMPILE) then you’re toast. Otherwise, there isn’t much in it between the Table variable and the temporary table. The table variable is faster up to 8000 rows and then not much in it up to 100,000 rows. Past the 8000 row mark, we’ve lost the advantage of the table variable’s speed. Any general rule you may be formulating has just gone for a walk. What we can conclude from this experiment is that if you join two table variables, and can’t use constraints, you’re going to need that Option (RECOMPILE) hint. Count Dracula and the Horror Join. These tables of integers provide a rather unreal example, so let’s try a rather different example, and get stuck into some implicit indexing, by using constraints. What unusual words are contained in the book ‘Dracula’ by Bram Stoker? Here we get a table of all the common words in the English language (60,387 of them) and put them in a table. We put them in a Table Variable with the word as a primary key, a Table Variable Heap and a Table Variable with a primary key. We then take all the distinct words used in the book ‘Dracula’ (7,558 of them). We then create a table variable and insert into it all those uncommon words that are in ‘Dracula’. i.e. all the words in Dracula that aren’t matched in the list of common words. To do this we use a left outer join, where the right-hand value is null. The results show a huge variation, between the sublime and the gorblimey. If both tables contain a Primary Key on the columns we join on, and both are Table Variables, it took 33 Ms. If one table contains a Primary Key, and the other is a heap, and both are Table Variables, it took 46 Ms. If both Table Variables use a unique constraint, then the query takes 36 Ms. If neither table contains a Primary Key and both are Table Variables, it took 116383 Ms. Yes, nearly two minutes!! If both tables contain a Primary Key, one is a Table Variables and the other is a temporary table, it took 113 Ms. If one table contains a Primary Key, and both are Temporary Tables, it took 56 Ms.If both tables are temporary tables and both have primary keys, it took 46 Ms. Here we see table variables which are joined on their primary key again enjoying a  slight performance advantage over temporary tables. Where both tables are table variables and both are heaps, the query suddenly takes nearly two minutes! So what if you have two heaps and you use option Recompile? If you take the rogue query and add the hint, then suddenly, the query drops its time down to 76 Ms. If you add unique indexes, then you've done even better, down to half that time. Here are the text execution plans.So where have we got to? Without drilling down into the minutiae of the execution plans we can begin to create a hypothesis. If you are using table variables, and your tables are relatively small, they are faster than temporary tables, but as the number of rows increases you need to do one of two things: either you need to have a primary key on the column you are using to join on, or else you need to use option (RECOMPILE) If you try to execute a query that is a join, and both tables are table variable heaps, you are asking for trouble, well- slow queries, unless you give the table hint once the number of rows has risen past a point (30,000 in our first example, but this varies considerably according to context). Kevin’s Skew In describing the table-size, I used the term ‘relatively small’. Kevin Boles produced an interesting case where a single-row table variable produces a very poor execution plan when joined to a very, very skewed table. In the original, pasted into my article as a comment, a column consisted of 100000 rows in which the key column was one number (1) . To this was added eight rows with sequential numbers up to 9. When this was joined to a single-tow Table Variable with a key of 2 it produced a bad plan. This problem is unlikely to occur in real usage, and the Query Optimiser team probably never set up a test for it. Actually, the skew can be slightly less extreme than Kevin made it. The following test showed that once the table had 54 sequential rows in the table, then it adopted exactly the same execution plan as for the temporary table and then all was well. Undeniably, real data does occasionally cause problems to the performance of joins in Table Variables due to the extreme skew of the distribution. We've all experienced Perfectly Poisonous Table Variables in real live data. As in Kevin’s example, indexes merely make matters worse, and the OPTION (RECOMPILE) trick does nothing to help. In this case, there is no option but to use a temporary table. However, one has to note that once the slight de-skew had taken place, then the plans were identical across a huge range. Conclusions Where you need to hold intermediate results as part of a process, Table Variables offer a good alternative to temporary tables when used wisely. They can perform faster than a temporary table when the number of rows is not great. For some processing with huge tables, they can perform well when only a clustered index is required, and when the nature of the processing makes an index seek very effective. Table Variables are scoped to the batch or procedure and are unlikely to hang about in the TempDB when they are no longer required. They require no explicit cleanup. Where the number of rows in the table is moderate, you can even use them in joins as ‘Heaps’, unindexed. Beware, however, since, as the number of rows increase, joins on Table Variable heaps can easily become saddled by very poor execution plans, and this must be cured either by adding constraints (UNIQUE or PRIMARY KEY) or by adding the OPTION (RECOMPILE) hint if this is impossible. Occasionally, the way that the data is distributed prevents the efficient use of Table Variables, and this will require using a temporary table instead. Tables Variables require some awareness by the developer about the potential hazards and how to avoid them. If you are not prepared to do any performance monitoring of your code or fine-tuning, and just want to pummel out stuff that ‘just runs’ without considering namby-pamby stuff such as indexes, then stick to Temporary tables. If you are likely to slosh about large numbers of rows in temporary tables without considering the niceties of processing just what is required and no more, then temporary tables provide a safer and less fragile means-to-an-end for you.

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  • Python/numpy tricky slicing problem

    - by daver
    Hi stack overflow, I have a problem with some numpy stuff. I need a numpy array to behave in an unusual manner by returning a slice as a view of the data I have sliced, not a copy. So heres an example of what I want to do: Say we have a simple array like this: a = array([1, 0, 0, 0]) I would like to update consecutive entries in the array (moving left to right) with the previous entry from the array, using syntax like this: a[1:] = a[0:3] This would get the following result: a = array([1, 1, 1, 1]) Or something like this: a[1:] = 2*a[:3] # a = [1,2,4,8] To illustrate further I want the following kind of behaviour: for i in range(len(a)): if i == 0 or i+1 == len(a): continue a[i+1] = a[i] Except I want the speed of numpy. The default behavior of numpy is to take a copy of the slice, so what I actually get is this: a = array([1, 1, 0, 0]) I already have this array as a subclass of the ndarray, so I can make further changes to it if need be, I just need the slice on the right hand side to be continually updated as it updates the slice on the left hand side. Am I dreaming or is this magic possible? Update: This is all because I am trying to use Gauss-Seidel iteration to solve a linear algebra problem, more or less. It is a special case involving harmonic functions, I was trying to avoid going into this because its really not necessary and likely to confuse things further, but here goes. The algorithm is this: while not converged: for i in range(len(u[:,0])): for j in range(len(u[0,:])): # skip over boundary entries, i,j == 0 or len(u) u[i,j] = 0.25*(u[i-1,j] + u[i+1,j] + u[i, j-1] + u[i,j+1]) Right? But you can do this two ways, Jacobi involves updating each element with its neighbours without considering updates you have already made until the while loop cycles, to do it in loops you would copy the array then update one array from the copied array. However Gauss-Seidel uses information you have already updated for each of the i-1 and j-1 entries, thus no need for a copy, the loop should essentially 'know' since the array has been re-evaluated after each single element update. That is to say, every time we call up an entry like u[i-1,j] or u[i,j-1] the information calculated in the previous loop will be there. I want to replace this slow and ugly nested loop situation with one nice clean line of code using numpy slicing: u[1:-1,1:-1] = 0.25(u[:-2,1:-1] + u[2:,1:-1] + u[1:-1,:-2] + u[1:-1,2:]) But the result is Jacobi iteration because when you take a slice: u[:,-2,1:-1] you copy the data, thus the slice is not aware of any updates made. Now numpy still loops right? Its not parallel its just a faster way to loop that looks like a parallel operation in python. I want to exploit this behaviour by sort of hacking numpy to return a pointer instead of a copy when I take a slice. Right? Then every time numpy loops, that slice will 'update' or really just replicate whatever happened in the update. To do this I need slices on both sides of the array to be pointers. Anyway if there is some really really clever person out there that awesome, but I've pretty much resigned myself to believing the only answer is to loop in C.

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  • CodePlex Daily Summary for Sunday, October 21, 2012

    CodePlex Daily Summary for Sunday, October 21, 2012Popular ReleasesBlogEngine.NET: BlogEngine.NET 2.7 RC: Cheap ASP.NET Hosting - $4.95/Month - Click Here!! Click Here for More Info Cheap ASP.NET Hosting - $4.95/Month - Click Here! dot This is a Release Candidate version for BlogEngine.NET 2.7. The most current, stable version of BlogEngine.NET is version 2.6. Find out more about the BlogEngine.NET 2.7 RC here. To get started, be sure to check out our installation documentation. If you are upgrading from a previous version, please take a look at the Upgrading to BlogEngine.NET 2.7 instructions...Pulse: Pulse 0.6.3.0: Fixed a number of bugs that showed up since my update yesterday. Fixes included are for: - Weird issue where the initial "Nature" wallbase.cc search would duplicate itself - After changing a providers settings it wouldn't take affect until you restarted Pulse (removing or adding a provider entirely did take effect though) - Another small issue with the regex for the wallbase.cc wallpapers that I tweaked yesterday, seems good now though.Liberty: v3.4.0.0 Release 20th October 2012: Change Log -Added -Halo 4 support (invincibility, ammo editing) -Reach A warning dialog now shows up when you first attempt to swap a weapon -Fixed -A few minor bugsMCEBuddy 2.x: MCEBuddy 2.3.3: 1. MCEBuddy now supports PIPE (2.2.15 style) and the newer remote TCP communication. This is to solve problems with faulty Ceton network drivers and some issues with older system related to load. When using LOCALHOST, MCEBuddy uses PIPE communication otherwise it uses TCP based communication. 2. UPnP is now disabled by Default since it interferes with some TV Tuner cards (CETON) that represent themselves as Network devices (bad drivers). Also as a security measure to avoid external connection...Orchard Project: Orchard 1.6 RC: RELEASE NOTES This is the Release Candidate version of Orchard 1.6. You should use this version to prepare your current developments to the upcoming final release, and report problems. Please read our release notes for Orchard 1.6 RC: http://docs.orchardproject.net/Documentation/Orchard-1-6-Release-Notes Please do not post questions as reviews. Questions should be posted in the Discussions tab, where they will usually get promptly responded to. If you post a question as a review, you wil...Rawr: Rawr 5.0.1: This is the Downloadable WPF version of Rawr!For web-based version see http://elitistjerks.com/rawr.php You can find the version notes at: http://rawr.codeplex.com/wikipage?title=VersionNotes Rawr Addon (NOT UPDATED YET FOR MOP)We now have a Rawr Official Addon for in-game exporting and importing of character data hosted on Curse. The Addon does not perform calculations like Rawr, it simply shows your exported Rawr data in wow tooltips and lets you export your character to Rawr (including ba...Yahoo! UI Library: YUI Compressor for .Net: Version 2.1.1.0 - Sartha (BugFix): - Revered back the embedding of the 2x assemblies.Visual Studio Team Foundation Server Branching and Merging Guide: v2.1 - Visual Studio 2012: Welcome to the Branching and Merging Guide What is new? The Version Control specific discussions have been moved from the Branching and Merging Guide to the new Advanced Version Control Guide. The Branching and Merging Guide and the Advanced Version Control Guide have been ported to the new document style. See http://blogs.msdn.com/b/willy-peter_schaub/archive/2012/10/17/alm-rangers-raising-the-quality-bar-for-documentation-part-2.aspx for more information. Quality-Bar Details Documentatio...D3 Loot Tracker: 1.5.5: Compatible with 1.05.Write Once, Play Everywhere: MonoGame 3.0 (BETA): This is a beta release of the up coming MonoGame 3.0. It contains an Installer which will install a binary release of MonoGame on windows boxes with the following platforms. Windows, Linux, Android and Windows 8. If you need to build for iOS or Mac you will need to get the source code at this time as the installers for those platforms are not available yet. The installer will also install a bunch of Project templates for Visual Studio 2010 , 2012 and MonoDevleop. For those of you wish...Windawesome: Windawesome v1.4.1 x64: Fixed switching of applications across monitors Changed window flashing API (fix your config files) Added NetworkMonitorWidget (thanks to weiwen) Any issues/recommendations/requests for future versions? This is the 64-bit version of the release. Be sure to use that if you are on a 64-bit Windows. Works with "Required DLLs v3".Restful Objects for .NET: Restful Objects Server 1.0.1: Version 1.0.1 is a bug fix release - fixing bug #55 - a failure to conform to the Restful Objects spec (v.1.0.0) for the Parameters property on an Action Representation. Please note that the easiest way to use Restful Objects for .NET is as NuGet Packages: search the NuGet Public Gallery for 'restfulobjects'. It is only necessary to download the source (from here) if you wish to build and/or modify the framework yourself.Extensions.js: Extensions.js 0.8.3.6 (Release): Extensions.js provides type extensions to facilitate working with javascript objects in a style familiar to C# programmers.PdfReport: PdfReport 1.2: - Added navigation/nested properties support to StronglyTypedList DataSource. - Moved watermark location to the top layer. - Fixed grouping issue in multi column reports. - Fixed a typo, Pervious to Previous! - Added more than 25 samples. you can download them from the "source code" tab: http://pdfreport.codeplex.com/SourceControl/BrowseLatest - Added NuGet Package: http://nuget.org/packages/PdfReport/Merge PDF: MergePDF 1.0 Released: MergePDF 1.0 Released40FINGERS DotNetNuke StyleHelper: 40FINGERS StyleHelper Skin Object 02.06.04: Version 02.06.04:Bug Fix SuperUser Detection Passing IfRole="SuperUsers" did not detect Host users This has been corrected now and the code has been rewritten. New Attribute ContentFalse This is the content that gets injected when the conditions Version 02.06.03:Changed IfQs behavior: IfQs also to test if a query String Parameter exists You can now pass a QS paramter without value Where IfQS="ProductId:122" would test for a QS parameter ProductId with value 122 IfQS="ProductId" allows you t...Display attachments (list view) SP 2010: Display attachments (in list view) 1.0.0: Version 1.0.0: Display attachments for list item in list view Async loading attachments using library jQuery 1.8.2 Use sharepoint webservice (/vtibin/Lists.asmx) Simple in use Simple installation Localized: English RussianCODE Framework: 4.0.21017.0: See change log in the Documentation section for details.Magelia WebStore Open-source Ecommerce software: Magelia WebStore 2.1: Add support for .net 4.0 to Magelia.Webstore.Client and StarterSite version 2.1.254.3 Scheduler Import & Export feature (for Professional and Entreprise Editions) UTC datetime and timezone support .net 4.5 and Visual Studio 2012 migration client magelia global refactoring release of a nugget package to help developers speed up development http://nuget.org/packages/Magelia.Webstore.Client optimization of the data update mechanism (a.k.a. "burst") Performance improvment of the d...VFPX: FoxcodePlus: FoxcodePlus - Visual Studio like extensions to Visual FoxPro IntelliSense.New Projectsa new super fast css3 selector engine: kquery - A Super Fast And Compatible Css3 Selector Engine.AcfunWP: Acfun for Windows Phone??????MIT??????????,???????????Windows Phone?????????????????????。AdRotator v2: A highly customizable ad rotator component for Windows Phone and Windows 8 platforms, to be used with Silverlight, XNA and Monogame.BackUpCostaRicaProject: SumaryClickOnceTest: projekatCloudClipboardSync: Ha egy felhasználó eszközei közötti kommunikációról van szó, akkor a Dropbox és hasonló fájlszinkronizációs szolgáltatások felhasználhatók, mint korlátozott átvCodeplexTest: Enter two numbers to get the sum of them.cosuagwusumofnumbers: cosuagwu's sum of numberDaf Yomi WP7 App: Daf Yomi is a Windows Phone 7.5 application that let you listen to current Daf Yomi content from www.daf-yomi.com.Doctor Reg: Doctor Regfelixsumofnumbers: task1: getting two numbers from a user and calculating the sumFoxOS: La Volpe nel tuo osGanagro Lite: Windows forms application for handling grass-fed bull raising operations. Uses .net 3.5 and sql server (2005 or later). Written in c#, localized in spanish.GSISW8: ??a Windows Store efa?µ??? ? ?p??a pa???e? ?as??? St???e?a ??a ?? F?s??? ???s?pa ?a? F?s??? ???s?pa ?p?t?de?µat?e?, µ?s? t?? ???s?? t?? a????t?? Web Service t??JavaScript Calculator: ajogjoohon: Ua ua auaKRATOS: Kratos, the personification of power.Logical Disk Indicator: Logical Disk Indicator is a tool to monitor logical disk activity in notification area. Visual Basic.NET and .Net 2.0Media Organiser: This project aims to provide a tool that allows you not only to overview your media collection but also reorganize it following specific rules you can definePolymorphGame: A University project created in XNA integrating farseer physics engine. Contains some bugs and the code is not of the cleanest. Comments and critics welcome!qp: ????????? ??? ??????? ???? ?????? ????????? ? ???????????RAIP (Resonance Assignment by Integer Linear Programming): In progress...SanguoshaCardsCounter: SanguoshaCardsCounter??????????????????????????????。 ?????Microsoft Visual Studio 2012????C#????.NET Framework 4.5??。SimpleCalculatorProject: A simple calculator that adds two integers and displays the resultSJKP.PdfConversion: SharePoint 2010 Service Application framework, containing the infrastructure for easy OCR processing of PDF files in lists. A OCR component is not included.SoftwareTestingConcepts: Website gives information about Software Testing Concepts.SpeakToMe: SpeakToMe is a natural language processor that works by tokenizing the input based on known concepts and then matches the token structure against a set of rulesTododoo: This is my small hobby project - the simpliest todo-list possible.TokenUtil: TokenUtil is a command line program for requesting a token from a Security Token Service.VS2012 MSHA file builder: visual studio 2012 help view msha file creation

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