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• Silverlight Cream for April 22, 2010 -- #844

  - by Dave Campbell

  In this Issue: Miroslav Miroslavov, David Anson, Mike Snow, Jason Alderman, Denis Gladkikh, John Papa, Adam Kinney, and CrocusGirl. Shoutout: Mike Snow is moving his blog to Silverlight Tips of The Day... his first is a repeat of number 110 of the last list, but you'll want to bookmark the page. Falling in the 'too cool not to mention' category... Pete Brown posted another MIX10 interview: New Channel 9 Video: Josh Blake on NaturalShow Multi-touch in WPF Adam Kinney announced that the Upgrade to Expression Studio v4 for free – now in writing! From SilverlightCream.com: Visuals staring at the mouse cursor Miroslav Miroslavov at SilverlightShow has a first part post up on the design of the CompleteIT site... going through the 'follow the mouse' effect that is so cool on the main page... with source. Today's DataVisualizationDemos release includes new demos showing off stacked series behavior Falling squarly into the category of "when does he sleep"... David Anson has another Visualization post up today... adding a stacked series and Text-to-Chat sample. Silverlight: Unable to start Debugging. The Silverlight managed debugging package isn’t installed. Mike Snow has a tip up about what to do if you get an "Unable to start debugging" box when you crank up VS ... not a great solution, but it's a solution. Introducing Pillbox for Windows Phone The folks at Veracity definitely have way too much fun with technology :) ... check out the WP7 app that Jason Alderman blogged about... he has a link out to another page with screenshots... oh, AND the code... Export data to Excel from Silverlight/WPF DataGrid Denis Gladkikh demonstrates using COM Interop to export to Excel from both WPF and Silverlight. He discusses isses he had and has all the source for both platforms available. Silverlight TV 21: Silverlight 4 - A Customer's Perspective John Papa has Silverlight TV number 21 up and he's chatting with Franck Jeannin of Ormetis, Ward Bell of IdeaBlade, and Dave Wolf of Cynergy Systems, all presenters in the Keynote at DevConnections. Avatar Mosaic -Experimenting with the Artefact Animator Adam Kinney spent enough time with Artefact Animator to put up a lengthy post about it including his project. Artefact Animator itself is available on CodePlex, and Adam has the link... this looks like good stuff. Windows Phone 7 Design Notes – Part2: Metro + Adrian Frutiger CrocusGirl continues her WP7 Metro discussion with a great long post on background she's researched and some of her own work with typography... a great read. Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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• Blurry printed raster images with Brother MFC-8840D

  - by Adam Monsen

  (NOTE: crossposted here: ubuntuforums.org/showthread.php?t=1621795) I've got a Brother MFC-8840D. Works great with Ubuntu server! Setting up a CUPS print server was pretty straightforward, and I also finally got network scanning working reliably with saned. Printing documents and Web pages works well: fonts are crisp/clear, etc. One issue has got me completely vexed: printing raster (ie: JPG) images. They are blurry. For example, I can scan a page of black and white text at 150 or 300 dpi. The grayscale image looks perfect on my monitor. But the printed version is much blurrier than the original, regardless of the "print resolution" dpi I choose. As a counterexample, if I use the "copy" function of the MFC-8840D, the copy looks excellent, and this function is much, much faster than if I scan then print a scan of same. I've googled around a bunch and tried different tricks (printing a PDF with the image from evince, printing with Gimp, EOG and other applications) but I just can't print anything that looks as good as a copy made with the MFC-8840D. Any ideas? I'm using Ubuntu 10.04.1 LTS server. I'm using the PPD file from solutions.brother.com. Thanks, -Adam

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• Thin virtual host

  - by Adam Ryczkowski

  My work setup relies on old Windows XP. Now, when Windows XP isn't supported by new hardware, it's getting harder and harder to buy a notebook on which Windows XP can run natively with all essential hardware (wireless cards, graphics, sound etc). Since I don't expect my personal setup to turn away from Windows XP any time soon, I'm investigating the following trick: why not buy any decent hardware which Linux can fully utilize, and use it as a virtual host for a guest session with e.g. Windows XP. I like using hibernation, so I prefer this Linux to be as thin as possible, only enough to support VirtualBox, KVM or any other virtualization software. Question: Are there any "standard" ways to do this, like Linux distributions aimed specifically on being light virtualization host?

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• Thin virtual host [migrated]

  - by Adam Ryczkowski

  My work setup relies on old Windows XP. Now, when Windows XP isn't supported by new hardware, it's getting harder and harder to buy a notebook on which Windows XP can run natively with all essential hardware (wireless cards, graphics, sound etc). Since I don't expect my personal setup to turn away from Windows XP any time soon, I'm investigating the following trick: why not buy any decent hardware which Linux can fully utilize, and use it as a virtual host for a guest session with e.g. Windows XP. I like using hibernation, so I prefer this Linux to be as thin as possible, only enough to support VirtualBox, KVM or any other virtualization software. Question: Are there any "standard" ways to do this, like Linux distributions aimed specifically on being light virtualization host?

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• What parameters to mdadm, to re-create md device with payload starting at 0x22000 position on backing storage?

  - by Adam Ryczkowski

  I try to recover from mdadm raid disaster, which happened when moving from ubuntu server 10.04 to 12.04. I know the correct order of devices from dmesg log, but given this information, I still cannot access the data. The superblocks look messy; the mdadm --examine for each disk is on this question on askubuntu By inspecting the raw contents of backing storage, I found the beginning of my data (the LUKS container in my case) at position 0x22000 relative to the beginning of the first partition in the raid. Question: What is the combination of options issued to "mdadm --create" to re-create mdadm that starts with the given offset? Bitmap size? PS. The relevant information from syslog when the system was healthy are pasted here.

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• How to change or remove all traces of original author name in Excel 2010 document

  - by Adam Ryczkowski

  At our company we need to deploy one Excel Workbook in that way that nobody would see it is made by us by looking at the Office metadata. What fields do we need to look for? I know, that the document has track of original writer and the last save author. But is it all? I guess there might be some hidden properties, that might give our company name. Where to look for such fields? Is there any good editor available, or will explorer's property page give enough power? I use Excel 2010

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• Poor performance of single processor 32bit Windows XP xompared SMP in VBA+Excel

  - by Adam Ryczkowski

  Welcome! On many computers I experienced poor performance of 32 bit guests running on 64 bit Linux host (I used only the Debian family). At last I managed to collect benchmark data. I made the benchmark by running custom VBA macro, (which we use in our company) that generates 284 pages long Word document full of Excel Pie charts, tables and comments. The macro is run as a single task (excluding the standard services) on a set of identically configured Windows XP 32-bit systems. I measured the time (in sec.) needed to perform the test. The computer (i.e. my notebook Asus P53E) supports both VT-d extensions and native Windows XP. It has 2-core processor, each core is hyperthreaded, so in total we have 4 mostly independent execution units. I use the latest VirtualBox 4.2 and VMWare Workstation 9.0 for Linux, installed together on the same host (running Mint 13 Maya) but never run simultaneously. The results (in column Time) are no less accurate than ± 10% Here are the results (sorry for the format, but I couldn't find out a better solution for tables in SO): +---------------+-------------+------------------------------------------------------+---------+------------+----------------+------+ | Host software | # processor | Windows kernel | IO APIC | VT-x/AMD-V | 2D Video Accel | Time | +---------------+-------------+------------------------------------------------------+---------+------------+----------------+------+ | VirtualBox | 1 | Advanced Configuration and Power Interface (ACPI) PC | 0 | 1 | 0 | 1139 | | VirtualBox | 1 | Advanced Configuration and Power Interface (ACPI) PC | 0 | 1 | 1 | 1050 | | VirtualBox | 1 | Advanced Configuration and Power Interface (ACPI) PC | 0 | 0 | 1 | 1644 | | VirtualBox | 4 | ACPI Multiprocessor PC | 1 | 1 | 1 | 6809 | | VMWare | 1 | ACPI Uniprocessor PC | | 1 | 1 | 1175 | | VMWare | 4 | ACPI Multiprocessor PC | | 1 | 1 | 3412 | | Native | 4 | ACPI Multiprocessor PC | | | | 1693 | | Native | 1 | Advanced Configuration and Power Interface (ACPI) PC | | | | 1170 | +---------------+-------------+------------------------------------------------------+---------+------------+----------------+------+ Here are the striking conclusions: Although I've read in the VirtualBox fora about abysmal performance with 32-bit guest on 64-bit host, VMWare also has problems compared to native run, still being twice faster(!) than VBox. Although VBA is inherently single-threaded, the Excel calculations, which take much more than a half of total computation time, supposedly aren't. So one would expect some speed gain when running on 2+ cores ("+" for hyperthreading). What we see is a speed loss. And quite big one too. For the VirtualBox the VT-d extension isn't a big deal. Can anyone shed some light on why the singlethreaded Windows kernel is so much faster than the SMP one?

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• file system that allow to specify different RAID level per directory and change it afterward

  - by Adam Ryczkowski

  I have 5 hard drives, where I want to keep my data. Some of my files are more important, and some of them are less. So some of them I wish to put on RAID-6, and for some it RAID-5 is sufficient. It is difficult to predict at the moment of creation of the arrays how much space of each type to declare. What I would do if I didn't hear about zfs, is partition the hard drives into identical 100GB partitions, and as my needs grow, assemble those partitions into md devices using linux-raid. Then, I'd combine those devices using lvm into logical volumes where I'd put my data. So when I'd need more space of e.g. RAID-6, I'd take 100GB partition from each hard drive and assemble them into another RAID-6 md device and would use it as physical storage for the logical volume group dedicated for RAID-6 data. Then I could grow the file system on this logical volume. On top of RAID-6 and RAID-5 Volume Groups (managed by lvm) would reside completely independent file systems, which I'd later merge with multiple mount --bind into a single directory structure that would reflect the logical structure of data rather that of the storage. But now, when I heard about the ZFS with all the performance, data-healing and compression capabilities I cannot stop thinking if it can help me. If so, what do you think would be the best setup?

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• Ubuntu + Raid on HP proliant DL 160 G6

  - by Adam Matan

  Hi, I'm, trying to install Ubuntu 8.04 Server on an HP Proliant DL160 G6. The HP hardware is certified by Ubuntu for the 9.04 version, which I can't install due to company policy. The problem is that Ubuntu would not recognize the RAID 1+0 disk configured by the BIOS. The raid creates one ~470GB disk from two 500GB physical disks. Any ideas? Adam

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• webcam streaming on mobile phone

  - by adam

  hey guys im stuck on a project i have i need to find a way to stream my home webcam onto my mobile phone, in this case on a blackberry bold 9700, also i have an i pod touch 2.0. the problem i keep coming across is that every program i find askes for money, i am looking for a way to do this for free, ive been trying using vlc but have so far been unable to get the stream to work, any help would be great thanks a lot adam

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• MySQL: Load database to memory

  - by Adam Matan

  Hi, Is there a way to load an entire MySQL database to the RAM, especially on en EC2 server? The database is quite small (~500 MegaBytes) I have enough memory Speed issues are crucial - the resulted queries are used to serve a dynamic webpage. Thanks, Adam

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• Monitor utilities

  - by Adam Davis

  I'm a big fan of good monitor usage, but only currently use a few utilities to help me attain display nirvana across several systems and monitors. Part of this is due to not knowing what's available. Please list one monitor utility that you use and what it does for you per answer, and avoid duplicates - comment on and vote up the existing answers rather than adding a duplicate. Also, if there are existing questions that delve more specifically into one area of monitor utilities link that in a separate answer. -Adam

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• Internal Server Error issue with Codeigniter. Cant open linked page

  - by Adam Perlis

  Hi I am VERY new to backend development. I am trying to setup a User Registration using Codeigniter. I have gotten pretty far but for some reason I can get the "Create Account button working. I have my site up and running on t-mrkt.com/mycisite would you guys mind taking a look and seeing where I might be going wrong? Here is a link to my files: https://www.dropbox.com/sh/z54j4qd50yf3t0p/MnnghGBB_D Thanks for your help! Adam

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• Random password generator: many, in columns, on command line, in Linux

  - by Adam Backstrom

  A while back, I came across a random password generator for the command line that displayed a grid of "memorable" passwords. Output was something like this: adam@host:~$ CantRememberThisCommand lkajsdf aksjdfl kqwrupo qwerpoi qwerklw zxlkelq The idea was that you could run this utility while someone was looking over your shoulder, and still pick a password with some level of secrecy due to the large number of choices. I cannot remember what this utility was called. Oh interwebs, can you help?

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• New version of SQL Server Data Tools is now available

  - by jamiet

  If you don’t follow the SQL Server Data Tools (SSDT) blog then you may not know that two days ago an updated version of SSDT was released (and by SSDT I mean the database projects, not the SSIS/SSRS/SSAS stuff) along with a new version of the SSDT Power Tools. This release incorporates a an updated version of the SQL Server Data Tier Application Framework (aka DAC Framework, aka DacFX) which you can read about on Adam Mahood’s blog post SQL Server Data-Tier Application Framework (September 2012) Available. DacFX is essentially all the gubbins that you need to extract and publish .dacpacs and according to Adam’s post it incorporates a new feature that I think is very interesting indeed: Extract DACPAC with data – Creates a database snapshot file (.dacpac) from a live SQL Server or Windows Azure SQL Database that contains data from user tables in addition to the database schema. These packages can be published to a new or existing SQL Server or Windows Azure SQL Database using the SqlPackage.exe Publish action. Data contained in package replaces the existing data in the target database. In short, .dacpacs can now include data as well as schema. I’m very excited about this because one of my long-standing complaints about SSDT (and its many forebears) is that whilst it has great support for declarative development of schema it does not provide anything similar for data – if you want to deploy data from your SSDT projects then you have to write Post-Deployment MERGE scripts. This new feature for .dacpacs does not change that situation yet however it is a very important pre-requisite so I am hoping that a feature to provide declaration of data (in addition to declaration of schema which we have today) is going to light up in SSDT in the not too distant future. Read more about the latest SSDT, Power Tools & DacFX releases at: Now available: SQL Server Data Tools - September 2012 update! by Janet Yeilding New SSDT Power Tools! Now for both Visual Studio 2010 and Visual Studio 2012 by Sarah McDevitt SQL Server Data-Tier Application Framework (September 2012) Available by Adam Mahood @Jamiet

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• Oracle Developer Day OOP 2013 – become a Java expert & get a free ticket

  - by JuergenKress

  Want to become a Java Expert? Want to learn more about Java Roadmap, Java EE, Java FX, Java Cloud, ADF mobile, Rest and big data and try it hands-on? Make sure you attend the Oracle Developer Day 2013 with Adam Bien, Markus Eisele, Torsten Winterberg, Guido Schmut,  Wolfgang Weigend and Peter Doschkinow! Thursday January 24th 2013 Munich Conference Center Agenda 9.00-9.30:        Java Überblick und Roadmap – Wolfgang Weigend 9.30-10.00:       Java FX  – Peter Doschkinow 10.00-10.30:       ADF Mobile - Torsten Winterberg 10.30-11.00:       Pause 11.00-11.45:       Java EE – Adam Bien 11.45.12.15:       Java Cloud – Markus Eisele 12.15-12.45:       Java, big data & service bus & twitter– Guido Schmutz 12.45-14.30:       Mittag 14.30-16.30:       Hans-on workshops (parallel) Java FX Hands On ADF Mobile Glassfish Website with detail and Agenda Free registration for Exhibition and Oracle Developer Day For more information about Java please visit www.oracle.com/java WebLogic Partner Community For regular information become a member in the WebLogic Partner Community please visit: http://www.oracle.com/partners/goto/wls-emea ( OPN account required). If you need support with your account please contact the Oracle Partner Business Center. BlogTwitterLinkedInMixForumWiki Technorati Tags: OOP 2013,Oracle Developer Day,OOP Oracle,Adam Bien,Markus Eisele,Guido Schmutz,Torsten Winterberg,WebLogic Community,Oracle,OPN,Jürgen Kress

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• Big AdventureWorks2012

  - by jamiet

  Last week I launched AdventureWorks on Azure, an initiative to make SQL Azure accessible to anyone, in my blog post AdventureWorks2012 now available for all on SQL Azure. Since then I think its fair to say that the reaction has been lukewarm with 31 insertions into the [dbo].[SqlFamily] table and only 8 donations via PayPal to support it; on the other hand those 8 donators have been incredibly generous and we nearly have enough in the bank to cover a full year’s worth of availability. It was always my intention to try and make this offering more appealing and to that end I have used an adapted version of Adam Machanic’s make_big_adventure.sql script to massively increase the amount of data in the database and give the community more scope to really push SQL Azure and see what it is capable of. There are now two new tables in the database: [dbo].[bigProduct] with 25200 rows [dbo].[bigTransactionHistory] with 7827579 rows The credentials to login and use AdventureWorks on Azure are as they were before: Server mhknbn2kdz.database.windows.net Database AdventureWorks2012 User sqlfamily Password sqlf@m1ly Remember, if you want to support AdventureWorks on Azure simply click here to launch a pre-populated PayPal Send Money form - all you have to do is login, fill in an amount, and click Send. We need more donations to keep this up and running so if you think this is useful and worth supporting, please please donate.   I mentioned that I had to adapt Adam’s script, the main reasons being: Cross-database queries are not yet supported in SQL Azure so I had to create a local copy of [dbo].[spt_values] rather than reference that in [master] SELECT…INTO is not supported in SQL Azure The 1GB limit of SQLAzure web edition meant that there would not be enough space to store all the data generated by Adam’s script so I had to decrease the total number of rows. The amended script is available on my SkyDrive at https://skydrive.live.com/redir.aspx?cid=550f681dad532637&resid=550F681DAD532637!16756&parid=550F681DAD532637!16755 @Jamiet

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• APress Deal of the Day - 1/June/2012 - Introducing Visual C# 2010

  - by TATWORTH

  Today's $10 Deal of the Day from APress at http://www.apress.com/9781430231714 is Introducing Visual C# 2010."If you're new to C# programming, this book is the ideal way to get started. Respected author Adam Freeman guides you through the C# language by carefully building up your knowledge from fundamental concepts to advanced features." Adam Freeman is an excellent author. This is an excellent introduction to C# programming and a manual for those with experience. Having read through book, I am very impressed by its practical approach to C#. I cannot improve on the by-line "Get started on your C# journey with an expert by your side leading by example" Adam Freeman teaches C# by precept and example. I suspect he drives a Volvo C30 as it comes up in many of the code examples! Throughout the book there are numerous links back and forth so as to avoid over complicating the current topic. I have have no hesitation in recommending this book both to programmers starting out with C# and to the seasoned professional. It is a book that should be on every C# development team's book shelf.

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• Machine only responds to network requests from machines it is pinging

  - by ILikeFood

  I have two machines. WOPR: Ubuntu server edition 10.10 LTS 32 bit Adam Selene: Windows 7 home premium 64 bit / Ubuntu Desktop 10.10 LTS 64 bit I want to be able to SSH from Adam Selene to WOPR, so I connect them to the same network. Here's where things get weird. I cannot connect to WOPR in any way under normal circumstances. But, if WOPR is pinging Adam, then it starts responding to ping requests, HTTP gets, and SSH tunnels. I'm an amateur, and brand new to Ubuntu server, so I suspect there's a misconfiguration somewhere, but there's an off chance it's a bug in the OS. Does anyone know what might cause this behavior? Thanks a lot!

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• Writing tests for Rails plugins

  - by Adam

  I'm working on a plugin for Rails that would add limited in-memory caching to ActiveRecord's finders. The functionality itself is mature enough, but I can't for the life of me get unit tests to work with the plugin. I now have under vendor/plugins/my_plugin/test/my_plugin_test.rb a standard subclass of ActiveSupport::TestCase with a couple of basic tests. I try running 'rake test' from the plugin directory, and I have confirmed that this task loads the ruby file with the test case, but it doesn't actually run any of the tests. I followed the Rails plugin guide (http://guides.rubyonrails.org/plugins.html) where applicable, but it seems to be horribly outdated (it suggests things that Rails now do automatically, etc.) The only output I get is this: Kakadu:ingenious_record adam$ rake test (in /Users/adam/Sites/1_PRK/vendor/plugins/ingenious_record) /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby -Ilib:lib:test "/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/gems/1.8/gems/rake-0.8.3/lib/rake/rake_test_loader.rb" "test/ingenious_record_test.rb" The simplest test case looks like this: require 'test_helper' require 'active_record' class IngeniousRecordTest < ActiveSupport::TestCase test "example" do assert false end end This should definitely produce at least some output, and the only test in that file should produce a failed assertion. Any ideas what I could do to get Rails to run my tests?

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• How can I draw an arrow at the edge of the screen pointing to an object that is off screen?

  - by Adam Henderson

  I am wishing to do what is described in this topic: http://www.allegro.cc/forums/print-thread/283220 I have attempted a variety of the methods mentioned here. First I tried to use the method described by Carrus85: Just take the ratio of the two triangle hypontenuses (doesn't matter which triagle you use for the other, I suggest point 1 and point 2 as the distance you calculate). This will give you the aspect ratio percentage of the triangle in the corner from the larger triangle. Then you simply multiply deltax by that value to get the x-coordinate offset, and deltay by that value to get the y-coordinate offset. But I could not find a way to calculate how far the object is away from the edge of the screen. I then tried using ray casting (which I have never done before) suggested by 23yrold3yrold: Fire a ray from the center of the screen to the offscreen object. Calculate where on the rectangle the ray intersects. There's your coordinates. I first calculated the hypotenuse of the triangle formed by the difference in x and y positions of the two points. I used this to create a unit vector along that line. I looped through that vector until either the x coordinate or the y coordinate was off the screen. The two current x and y values then form the x and y of the arrow. Here is the code for my ray casting method (written in C++ and Allegro 5) void renderArrows(Object* i) { float x1 = i->getX() + (i->getWidth() / 2); float y1 = i->getY() + (i->getHeight() / 2); float x2 = screenCentreX; float y2 = ScreenCentreY; float dx = x2 - x1; float dy = y2 - y1; float hypotSquared = (dx * dx) + (dy * dy); float hypot = sqrt(hypotSquared); float unitX = dx / hypot; float unitY = dy / hypot; float rayX = x2 - view->getViewportX(); float rayY = y2 - view->getViewportY(); float arrowX = 0; float arrowY = 0; bool posFound = false; while(posFound == false) { rayX += unitX; rayY += unitY; if(rayX <= 0 || rayX >= screenWidth || rayY <= 0 || rayY >= screenHeight) { arrowX = rayX; arrowY = rayY; posFound = true; } } al_draw_bitmap(sprite, arrowX - spriteWidth, arrowY - spriteHeight, 0); } This was relatively successful. Arrows are displayed in the bottom right section of the screen when objects are located above and left of the screen as if the locations of the where the arrows are drawn have been rotated 180 degrees around the center of the screen. I assumed this was due to the fact that when I was calculating the hypotenuse of the triangle, it would always be positive regardless of whether or not the difference in x or difference in y is negative. Thinking about it, ray casting does not seem like a good way of solving the problem (due to the fact that it involves using sqrt() and a large for loop). Any help finding a suitable solution would be greatly appreciated, Thanks Adam

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• SQL Server Optimizer Malfunction?

  - by Tony Davis

  There was a sharp intake of breath from the audience when Adam Machanic declared the SQL Server optimizer to be essentially "stuck in 1997". It was during his fascinating "Query Tuning Mastery: Manhandling Parallelism" session at the recent PASS SQL Summit. Paraphrasing somewhat, Adam (blog | @AdamMachanic) offered a convincing argument that the optimizer often delivers flawed plans based on assumptions that are no longer valid with today’s hardware. In 1997, when Microsoft engineers re-designed the database engine for SQL Server 7.0, SQL Server got its initial implementation of a cost-based optimizer. Up to SQL Server 2000, the developer often had to deploy a steady stream of hints in SQL statements to combat the occasionally wilful plan choices made by the optimizer. However, with each successive release, the optimizer has evolved and improved in its decision-making. It is still prone to the occasional stumble when we tackle difficult problems, join large numbers of tables, perform complex aggregations, and so on, but for most of us, most of the time, the optimizer purrs along efficiently in the background. Adam, however, challenged further any assumption that the current optimizer is competent at providing the most efficient plans for our more complex analytical queries, and in particular of offering up correctly parallelized plans. He painted a picture of a present where complex analytical queries have become ever more prevalent; where disk IO is ever faster so that reads from disk come into buffer cache faster than ever; where the improving RAM-to-data ratio means that we have a better chance of finding our data in cache. Most importantly, we have more CPUs at our disposal than ever before. To get these queries to perform, we not only need to have the right indexes, but also to be able to split the data up into subsets and spread its processing evenly across all these available CPUs. Improvements such as support for ColumnStore indexes are taking things in the right direction, but, unfortunately, deficiencies in the current Optimizer mean that SQL Server is yet to be able to exploit properly all those extra CPUs. Adam’s contention was that the current optimizer uses essentially the same costing model for many of its core operations as it did back in the days of SQL Server 7, based on assumptions that are no longer valid. One example he gave was a "slow disk" bias that may have been valid back in 1997 but certainly is not on modern disk systems. Essentially, the optimizer assesses the relative cost of serial versus parallel plans based on the assumption that there is no IO cost benefit from parallelization, only CPU. It assumes that a single request will saturate the IO channel, and so a query would not run any faster if we parallelized IO because the disk system simply wouldn’t be able to handle the extra pressure. As such, the optimizer often decides that a serial plan is lower cost, often in cases where a parallel plan would improve performance dramatically. It was challenging and thought provoking stuff, as were his techniques for driving parallelism through query logic based on subsets of rows that define the "grain" of the query. I highly recommend you catch the session if you missed it. I’m interested to hear though, when and how often people feel the force of the optimizer’s shortcomings. Barring mistakes, such as stale statistics, how often do you feel the Optimizer fails to find the plan you think it should, and what are the most common causes? Is it fighting to induce it toward parallelism? Combating unexpected plans, arising from table partitioning? Something altogether more prosaic? Cheers, Tony.

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• Google Talk Chat/Conference Solutions

  - by Adam Davis

  I started using the old confbot python conference script in 2005 for my family. This essentially implements an IRC like conference room over Google Talk (or any Jabber/XMPP server). It has significantly increased family communication, and has become rather indispensable due to this. Recently it's begun to have severe problems (people can't see each other in the conference room) which has nearly killed the usefulness of it. Before I develop my own software or debug confbot (probably not - it uses an older jabber library that hasn't been updated since 2003) I wanted to see what other solutions exist that meet our needs: Supports Google Talk (Sorry, I'm not going to try to convince everyone involved to move to a new IM or other client) Free and open source (ideal, but not required) Runs on Windows (Not a web service run by someone else) Implements basic functionality such as kick/ban, emotes Remembers who joined the conference room across restarts Obeys Do Not Disturb and Busy status Archives all activity -Adam

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• Long file path returning 404 for "hello.htm"

  - by Adam Kane

  Hello, I have a long file path that works on my server, but a simliar path returns a 404 error when it is on my clients (IIS6) server (http://ddmat.com/). Here's the functioning file path on my server: http://www.forgefx.com/projects/ddmat/install/Application Files/McCurdys_1_0_0_0/Content/FBX/CCAE1B33/Roof-sectionB-02.fbm/hello.htm My guesses: Maybe the file path is too long? Maybe the ".fbm" in the directory path is invalid? Sorry for the vauge problem description. Please let me know what additional info I can provide that'd be helpful. Update: The problem happens even in short paths, with no spaces: http://www.myserver/test.folder/hell.htm Thanks, Adam

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• Redirecting X output

  - by Adam Matan

  Hi, I have a small program that checks some elements of a web service. The program shows graphics output and displays commmand-line results as well. I have been trying to automate this program to run periodically on a server in my office. Problem is, It only works when I have X enabled - either directly on the server, or via ssh -X. Following Google, I have tried Xvfb, which gave me quite cryptic error message: Xvfb :1 -screen 0 1600x1200x32 Fatal server error: Server is already active for display 1 If this server is no longer running, remove /tmp/.X1-lock and start again. Any ideas how to run it? I'm actually looking for the X equivalent of &>/dev/null... Thanks in advance, Adam

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