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• How do I set up live audio streams to a DLNA compliant device?

  - by Takkat

  Is there a way to stream the live output of the soundcard from our 12.04.1 LTS amd64 desktop to a DLNA-compliant external device in our network? Selecting media content in shared directories using Rygel, miniDLNA, and uShare is always fine - but so far we completely failed to get a live audio stream to a client via DLNA. Pulseaudio claims to have a DLNA/UPnP media server that together with Rygel is supposed to do just this. But we were unable to get it running. We followed the steps outlined in live.gnome.org, this answer here, and also in another similar guide. As soon as we select the local audio device, or our GST-Launch stream in the DLNA client Rygel displays the following message and the client states it reached the end of the playlist: (rygel:7380): Rygel-WARNING **: rygel-http-request.vala:97: Invalid seek request This is how we configured GST-Launch in rygel.conf: [GstLaunch] enabled=true launch-items=mypulseaudiosink mypulseaudiosink-title=Audio on @HOSTNAME@ mypulseaudiosink-mime=audio/x-wav mypulseaudiosink-launch=pulsesrc device=<device> ! wavpackenc For <device> we tried with the default sink name, this name appended with .monitor, and in addition with upnp-sink and upnp.monitor that was created when we selected DLNA media server from paprefs. We also tried to encode using lamemp3enc with no luck. These are our pulseaudio modules: http://paste.ubuntu.com/1202913/ These are our sinks: http://paste.ubuntu.com/1202916/ Did we miss any other additional configuration needed to get this running? Are there any other alternatives for sending the audio of our soundcard as live stream to a DLNA client?

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• How to install Radeon 3670 HD graphics drivers for Ubuntu 10.04 64 bit with OpenGL 2.0 support?

  - by Daniel

  I've been having trouble with getting graphics drivers to work that support OpenGL 2.0. I've had some luck with the Ubuntu drivers, however these only support OpenGL 1.3. I thought I would document the methods that I have tried both to see if anyone else has ideas, and to save time for people with a similar problem. System details: Ubuntu 10.04 (Lucid) 64 bit Kernel Linux 2.6.32-44-generic GNOME 2.30.2 ATI Mobility Radeon HD 3670 Attempted Methods The methods I have tried are: 1. Installing Proprietary Drivers using the "Hardware Drivers" (Jockey) GUI This GUI offers an "ATI/AMD proprietary FGLRX graphics driver" however any attempts to install it result in a "Sorry, installation of this driver failed" error. The log file is here. There is an Ask Ubuntu question that covers this scenario, and notes that there is a known bug with Jockey. 2. Installing the Proprietary Drivers manually The answer to the question above linked to this wiki page, which gives instructions for installing Catalyst 12.6. This supported hardware list states that the 3670 is not supported in 12.6, and 12.4 must be used. This is somewhat confusing, as AMD's website suggests that the 12.6 driver should be installed for the 3670. There have been user reports that R600 (the GPU inside the 3670 card) doesn't work with 12.6, so I'm sticking with 12.4. I'm following these instructions to install the proprietary drivers on Lucid. I downloaded the 12.4 driver from the AMD website. Building the package worked fine, generating the fglrx, fglrx-dev, fglrx-amdcccle, and fglrx-modaliases deb packages successfully. However, when I try to install these using dpkg it gives me these errors. The make log referenced in the error is here. Ask Ubuntu References What is the correct way to install ATI Catalyst Video Drivers? Cannot install ATI/AMD FGLRX restricted graphic drivers Is my ATI graphics card supported in Ubuntu?

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• Java Road Trip: Code to Coast

  - by Tori Wieldt

  tweetmeme_url = 'http://blogs.oracle.com/javaone/2010/06/java_road_trip_code_to_coast.html'; Share .FBConnectButton_Small{background-position:-5px -232px !important;border-left:1px solid #1A356E;} .FBConnectButton_Text{margin-left:12px !important ;padding:2px 3px 3px !important;} The Java Road Trip: Code to CoastJava developers, architects, programmers, and enthusiasts: get ready for a real adrenaline rush! Follow the Java Road Trip: Code to Coast as this high-tech block party on wheels travels to 20 cities across the United States showcasing Oracle's commitment to everything Java. It's a chance to talk to Java leaders and engineers and get your hands on the latest Java technology. The Java Road Trip kicks off June 14 in New York City with Octavian Tanase, Vice President, Java Platform Group at Oracle, headlining the event. Don't miss    EJBs in Boston!    Governance in Washington, DC!    Swing(ing) in Memphis!    Mile-high UIs in Denver!    Java in Seattle! (too easy)     and more!Join or follow the tour here: http://java.com/roadtrip/Read the Oracle Magazine articleUse or follow the hash tag #javaroadtrip

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• 1.5 million Windows 7 phone’s sold…

  - by Boonei

  Microsoft announced that it has sold over 1.5 million windows 7 phone devices. Windows 7 is a new generation of OS. Mobile operators/users/device programmers need to adopt the same. Its not going to be a easy transition because it’s not an advanced/next version of win 6.x for mobile. We have heard that development from Microsoft side for Win 6.x devices will not continue after sometime. Don’t know how long will get the support! Everything in it s quite new, like OS, User interface, XBox sync, and also requires mobile phone companies to run the OS on high end chips, meaning atleast 1GHz. So the user segment occupied by phones like HTC Wild Fire are not the ones targeted.   Hey ! There an is a catch with this magic number 1.5 million…. It depicts only the number of units sold to mobile operators and retailers. It’s not the number of actual units held in consumers hands and activated. The number could improve significantly in 2011 where Sprint and Verizon join the party in United States. Atleast dozen phone models are in line up now in the rest of the world running Win 7 OS. One good things that customers can rejoice is that Microsoft will direly push software updates to all its consumers. Operator will not interfere. We can expect strong sales going forward with just this important point where Google’s Android lacks the same. [Img Credit: Microsoft] This article titled,1.5 million Windows 7 phone’s sold…, was originally published at Tech Dreams. Grab our rss feed or fan us on Facebook to get updates from us.

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• Java - System design with distributed Queues and Locks

  - by sunny

  Looking for inputs to evaluate a design for a system (java) which would have a distributed queue serving several (but not too many) nodes. These nodes would process objects present in the distributed queue and on occasion require a distributed lock across the cluster on an arbitrary (distributed) data structures. These (distributed) data structures could potentially lie in a distributed cache. Eliminating Terracotta (DSO),Hazelcast and Akka what could be alternative choices. Currently considering zookeeper as a distributed locking mechanism. Since the recommendation of a znode is not to exceed the 1M size , the understanding is that zookeeper should not be used a distributed queue. And also from Netflix curator tech note 4. So should a distributed cache, say like memcached, or redis be used to emulate a distributed queue ? i.e. The distributed queue will be stored in the caches and will be locked cluster-wide via zookeeper. Are there potential pitfalls with this high-level approach. The objects don't need to be taken off the queue. The object will pass through a lifecycle which will determine its removal from the queue. There would be about 10k+ objects in a queue at a given time changing states and any node could service one stage of the object's lifecycle. (Although not strictly necessary .. i.e. one node could serve the entire lifecycle if that is more efficient.) Any suggestions/alternatives ? sidenote: new to zookeeper ; redis etc.

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• Venezuela's Highly Inflationary Economy Means Changes to Financial Statements

  - by Theresa Hickman

  This is a bit of an esoteric topic, but given the number of U.S. Companies (particularly oil companies) that operate and have subsidiaries in Venezuela, I think it is worthy of an honorable mention. As you may or may not know, Venezuela's currency has had some changes over the years. In 2008, the Venezuelan Bolivar became the Bolivar Fuerte which dropped three zeros. So Bs.10,000 became Bs.F.10 and all their bills and coins were changed to reflect this. Then on Jan. 8, 2010, the government devalued the currency by 100%. The conversion from VEF to USD dropped from 2.15 to 4.30. (I always wanted to visit Venezuela; I guess it's time to book my vacation). The SEC recently labeled Venezuela a highly inflationary economy. This means that US companies with investments/subsidiaries in Venezuela will need to apply highly inflationary accounting rules starting on Jan. 1, 2010. In addition, companies need to make more detailed disclosures when the Venezuelan reported balances differ from the actual US dollar denominated balances. In a nut shell, if you formerly used translation, then starting Jan 1 of this year, you must now use remeasurement (or temporal method) to restate your Venezuelan entity's financial statements. See ASC topic 830, Foreign Currency Matters, which states that "[t]he financial statements of a foreign entity in a highly inflationary economy shall be remeasured as if the functional currency were the reporting currency." For you non-accountants that I haven't bored and are still reading at this point, the reason why the SEC is doing this is to ensure financial statements are presented as accurately as possible. Hyperinflationary economies have volatile currencies, such as Venezuela (it's not every day a currency devalues 100% overnight) which can distort financial statements if the local currency (Venezuelan Bolivar Fuerte) is used as the functional currency. To make financial statements more accurate, the reporting currency of the U.S. parent (US dollars) should be used as the functional currency. FASB.orgactually has a nice write-up on this.

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• LobsterPot Solutions in the USA

  - by Rob Farley

  We’re expanding! I’m thrilled to announce that Microsoft Gold Partner LobsterPot Solutions has started another branch appointing the amazing Ted Krueger (5-time SQL MVP awardee) as the US lead. Ted is well-known in the SQL Server world, having written books on indexing, consulting and on being a DBA (not to mention contributing chapters to both MVP Deep Dives books). He is an expert on replication and high availability, and strong in the Business Intelligence space – vast experience which is both broad and deep. Ted is based in the south east corner of Wisconsin, just north of Chicago. He has been a consultant for eons and has helped many clients with their projects and problems, taking the role as both technical lead and consulting lead. He is also tireless in supporting and developing the SQL Server community, presenting at conferences across America, and helping people through his blog, Twitter and more. Despite all this – it’s neither his technical excellence with SQL Server nor his consulting skill that made me want him to lead LobsterPot’s US venture. I wanted Ted because of his values. In the time I’ve known Ted, I’ve found his integrity to be excellent, and found him to be morally beyond reproach. This is the biggest priority I have when finding people to represent the LobsterPot brand. I have no qualms in recommending Ted’s character or work ethic. It’s not just my thoughts on him – all my trusted friends that know Ted agree about this. So last week, LobsterPot Solutions LLC was formed in the United States, and in a couple of weeks, we will be open for business! LobsterPot Solutions can be contacted via email at [email protected], on the web at either www.lobsterpot.com.au or www.lobsterpotsolutions.com, and on Twitter as @lobsterpot_au and @lobsterpot_us. Ted Kruger blogs at LessThanDot, and can also be found on Twitter and LinkedIn. This post is cross-posted from http://lobsterpotsolutions.com/lobsterpot-solutions-in-the-usa

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• Crashplan not starting. Fails to find swt-gtk

  - by Pibben

  I've installed Crashplan on my (K)Ubuntu computer. However, it fails to start and the ui_output.log says: [09.02.12 15:24:43.518 INFO main root ] ************************************************************* [09.02.12 15:24:43.519 INFO main root ] ************************************************************* [09.02.12 15:24:43.524 INFO main root ] Loading lib/swt-64.jar, exists=true [09.02.12 15:24:43.525 INFO main root ] [file:/usr/local/crashplan/lib/com.backup42.desktop.jar, file:/usr/local/crashplan/lang/, file:/usr/local/crashplan/skin/, file:/usr/local/crashplan/lib/swt-64.jar] [09.02.12 15:24:43.527 INFO main root ] STARTED CrashPlanDesktop [09.02.12 15:24:43.528 INFO main root ] CPVERSION = 3.2.1 - 1332824401321 (2012-03-27T05:00:01:321+0000) [09.02.12 15:24:43.529 INFO main root ] ARGS = [ ] [09.02.12 15:24:43.531 INFO main root ] LOCALE = English (United States) [09.02.12 15:24:43.570 ERROR main com.backup42.desktop.CPDesktop ] Failed to launch CPDesktop; java.lang.UnsatisfiedLinkError: no swt-gtk-3557 or swt-gtk in swt.library.path, java.library.path or the jar file, java.lang.UnsatisfiedLinkError: no swt-gtk-3557 or swt-gtk in swt.library.path, java.library.path or the jar file java.lang.UnsatisfiedLinkError: no swt-gtk-3557 or swt-gtk in swt.library.path, java.library.path or the jar file at org.eclipse.swt.internal.Library.loadLibrary(Unknown Source) at org.eclipse.swt.internal.Library.loadLibrary(Unknown Source) at org.eclipse.swt.internal.C.<clinit>(Unknown Source) at org.eclipse.swt.internal.Converter.wcsToMbcs(Unknown Source) at org.eclipse.swt.internal.Converter.wcsToMbcs(Unknown Source) at org.eclipse.swt.widgets.Display.<clinit>(Unknown Source) at com.backup42.desktop.CPDesktop.<init>(CPDesktop.java:231) at com.backup42.desktop.CPDesktop.main(CPDesktop.java:161) [09.02.12 15:24:43.570 ERROR main root ] Failed to launch CPDesktop; java.lang.UnsatisfiedLinkError: no swt-gtk-3557 or swt-gtk in swt.library.path, java.library.path or the jar file I've installed the relevant (I think) swt-gtk packages.

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• Ask the Readers: How Fast is Your Internet Connection?

  - by Mysticgeek

  The federal government recently announced a broadband initiative that calls for 260 million homes to have 100Mbps Internet connections by the year 2020. This got us wondering, how fast is your current Internet connection? Photo by roland When it comes to the speed of our Internet connection, we all want the maximum possible. The FCC recently announced their National Broadband Plan, which is an initiative to improve the Internet infrastructure in the United States and provide higher speeds to everyone. You’ve also undoubtedly heard the news about Google getting into the mix with their program to bring ultra high-speed fiber broadband to 50,000 users in select cities. While we wait for those programs to come into fruition, we thought it would be cool to check out what kinds of speeds you’re getting now. Test Your Internet Connection Speed There are several sites out there you can use to test your Internet speeds, but probably the best site is Speedtest.net. It’s easy to use, and allows you test download and upload speeds to and from various locations in the US and throughout the world. If you already know the speeds you’re getting leave a comment and let us know. If you use Speedtest.com, just keep in mind that our comment system won’t allow you to copy their result links, but you can simply tell us what you get in the results. We’re especially interested in the results of those of you who have Verizon FIOS or Comcast’s “Ultra” service. Leave a comment and join in the discussion! Similar Articles Productive Geek Tips Configure How often Ubuntu checks for Automatic UpdatesMysticgeek Blog: A Look at Internet Explorer 8 Beta 1 on Windows XPNorton Internet Security 2010 [Review]Disable Fast User Switching on Windows XPUnderstanding Vista’s New Network Connection Icons TouchFreeze Alternative in AutoHotkey The Icy Undertow Desktop Windows Home Server – Backup to LAN The Clear & Clean Desktop Use This Bookmarklet to Easily Get Albums Use AutoHotkey to Assign a Hotkey to a Specific Window Latest Software Reviews Tinyhacker Random Tips Revo Uninstaller Pro Registry Mechanic 9 for Windows PC Tools Internet Security Suite 2010 PCmover Professional Converting Mp4 to Mp3 Easily Use Quick Translator to Translate Text in 50 Languages (Firefox) Get Better Windows Search With UltraSearch Scan News With NY Times Article Skimmer SpeedyFox Claims to Speed up your Firefox Beware Hover Kitties

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• MySQL - Installation

  - by Stuart Brierley

  In order to create a development environment for a project I am working on, I recently needed to install MySQL Server.  The first step was to download the msi. Running this presents you with the installer splash screen, detailing the version of MySQL that you are about to install - in this case MySQL Server 5.1. Next you can choose whether to install a Typical, Complete or Custom installation.  Although this is the first time I have installed MySQL and the Custom option states "Recommended for advanced users" I opted to carry out a Custom installation, specifically so that I could be sure of what features and components were installed. On the Custom Setup screen you can choose which components to install.  By default the Developer Components are not included, but I opted to include some of these elements. Next up is the ready to install screen and then the intsallation progress.   Following the completion of the installation you are shown a few screens with details of the MySQL Enterprise subscription option. Finally the installation is complete and you are offered the chance to configure and register MySQL. Next I will be looking at the configuration of MySQL Server 5.1.

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• Keep Your Eye on the Ball

  - by [email protected]

  With the FIFA World Cup 2010 in South Africa almost a week underway, the soccer fans all around the World are talking about at least 2 things. That typical vuvuzela sound and the new Jabulani ball, saying it moves unpredictably, is difficult to handle and somehow the altitude of the World Cup stadiums also seem to be a contributing factor.(Picture taken from http://www.flickr.com/photos/warrenski/4143923059/ under a Creative Commons license)Although the FIFA states that it hasn't received any official complaints, the end users don't seem to be very happy with this new ball. This brings me to a comparison with IT management and testing. When you're in a situation where you're introducing a new product, in IT terms, introducing a new application, you would like to test all possible scenarios that your end users could be using and experiencing. However, that's a very time and resource intensive process to do for every application change or update.  It's like getting ready for the big game but you have no game plan.That's why a new approach has been developed. One that's based on the 80/20 rule. Testing 80% of the application will cost about 20% of the efforts. The remaining 20% of your application will not be tested before deployment, but monitored with a real user monitoring solution immediately after deployment. These tools track all user experiences, including error messages and the performance and availability metrics from an end user perspective. Should any anomaly occur, you would be able to repair it quickly so you and your end users can get back into the game.These real user sessions can be easily converted into testing scripts, so the 80% of the application testing can be complimented with the remaining 20%.Oracle Enterprise Manager 11g group of products offers both the real user monitoring solution with Oracle Real User Experience Insight, as well as the required testing solution with Oracle Application Testing Suite. Visit our Oracle Enterprise Manager 11g resource center and find out how it's Business-Driven IT Management approach will help you keep your eye on your business ball.Happy World Cup.

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• Alternative to Game State System?

  - by Ricket

  As far as I can tell, most games have some sort of "game state system" which switches between the different game states; these might be things like "Intro", "MainMenu", "CharacterSelect", "Loading", and "Game". On the one hand, it totally makes sense to separate these into a state system. After all, they are disparate and would otherwise need to be in a large switch statement, which is obviously messy; and they certainly are well represented by a state system. But at the same time, I look at the "Game" state and wonder if there's something wrong about this state system approach. Because it's like the elephant in the room; it's HUGE and obvious but nobody questions the game state system approach. It seems silly to me that "Game" is put on the same level as "Main Menu". Yet there isn't a way to break up the "Game" state. Is a game state system the best way to go? Is there some different, better technique to managing, well, the "game state"? Is it okay to have an intro state which draws a movie and listens for enter, and then a loading state which loops on the resource manager, and then the game state which does practically everything? Doesn't this seem sort of unbalanced to you, too? Am I missing something?

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• Silverlight Cream for May 29, 2010 -- #872

  - by Dave Campbell

  In this Issue: Michael Washington, Chris Koenig, Kunal Chowdhury, SilverLaw, Shayne Burgess, Ian T. Lackey, Alan Beasley, Marlon Grech. Shoutouts: Ozymandias has a post up that's not Silverlight necessarily, but it's pretty cool: Typeface Selection Flowchart Damian Schenkelman posted about the latest: Prism 2.2 Release available. Get it at Codeplex. From SilverlightCream.com: Silverlight 4 OData Paging with RX Extensions Michael Washington continues with this OData and Rx post using the View Model Style. Michael has some good external links, good info, and all the code. WP7 Part 4: Morphing and Mapping Chris Koenig has the 4th in his WP7 series he's doing, and this one is on MVVMLight and BingMaps ... code included. Silverlight 4: Interoperability with Excel using the COM Object Kunal Chowdhury has a post up about Excel Interoperability using the COM object including opening an Excel Workbook and writing data out, then modifying the data in the spreadsheet and seeing it updated in the app. Creating A Flexible Surface Effect – Silverlight 4 (Part 1) SilverLaw put up a demo of an awesome 'water ripple' SL4 demo a couple days ago, and now he's got part 1 of a great tutorial explaining it all. Service Operations and the WCF Data Services Client Shayne Burgess has a post up about Service Operations and how they can be used by the WCF Data Services client. Role Based Silverlight Behaviors Also from the Open Light Group, Ian T. Lackey has a post up about Behaviors that takes a list of roles and updates the UI appropriatetly. How to Toggle (Show/Hide) using Behaviours (Behaviors) between Visual States or Storyboards in Expression Blend for Windows Phone Alan Beasley has a quick post up talking about the solution he found to a problem he was having with state switching in a WP7 app. MEFedMVVM: Testability Marlon Grech has another MEFedMVVM post up and he's discussing Testability all rolled in there with everything else :) 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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• Fix corrupt NTFS partition without Windows

  - by Capt.Nemo

  MY NTFS Partition has gotten corrupt somehow (it's a relic from the days when I had Windows installed). I'm putting the debug output of fdisk and blkid here. At the same time, any OS is unable to mount my root partition, which is located next to my NTFS partition. I'm not sure if this has anything to do with it, though. I get the following error while trying to mount my root partition (sda5) mount: wrong fs type, bad option, bad superblock on /dev/sda5, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so ubuntu@ubuntu:~$ dmesg | tail [ 1019.726530] Descriptor sense data with sense descriptors (in hex): [ 1019.726533] 72 03 11 04 00 00 00 0c 00 0a 80 00 00 00 00 00 [ 1019.726551] 1a 3e ed 92 [ 1019.726558] sd 0:0:0:0: [sda] Add. Sense: Unrecovered read error - auto reallocate failed [ 1019.726568] sd 0:0:0:0: [sda] CDB: Read(10): 28 00 1a 3e ed 40 00 01 00 00 [ 1019.726584] end_request: I/O error, dev sda, sector 440331666 [ 1019.726602] JBD: Failed to read block at offset 462 [ 1019.726609] ata1: EH complete [ 1019.726612] JBD: recovery failed [ 1019.726617] EXT4-fs (sda5): error loading journal When I open gparted (using live CD), I get an exclamation next to my NTFS drive which states Is there a way to run chkdsk without using windows ? My attempt to run fsck results in the following : ubuntu@ubuntu:~$ sudo fsck /dev/sda fsck from util-linux-ng 2.17.2 e2fsck 1.41.14 (22-Dec-2010) fsck.ext2: Superblock invalid, trying backup blocks... fsck.ext2: Bad magic number in super-block while trying to open /dev/sda 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> Update : I was able to fix the NTFS partition running chkdsk off HBCD, but it seems that the superblock problem still remains. *Update 2: * Fixed superblock issue using e2fsck -c /dev/sda5

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• Remembering September 11 - 11 Years Later

  - by user12613380

  It's September 11 again and time to reminisce about that fateful day when the world came together as one. The attacks of that day touched everyone around the world as almost 3000 people from the United States and 38 other countries were killed. This year, I am finding it difficult to say anything other than what I have said in previous years. So, I will not try to "wax loquacious." Instead, I will simply say that I will never forgot. I will not forget where I was on that day. I will not forgot the people who died. I will not forget the people who gave their lives so that others might live. And I will not forget how our world changed on that day. And with that remembrance, we again return to our lives, using tragedy to drive us to build a world of peace and opportunity. My thanks go out again to the men and women, uniformed or not, who continue to protect us from harm. May we never again experience such human tragedy, on U.S. soil or elsewhere.

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• Understand how the TLB (Translation Lookaside buffer) works and interacts with pagetable and addresses

  - by Darxval

  So I am trying to understand this TLB (Translation Lookaside Buffer). But I am having a hard time grasping it. in context of having two streams of addresses, tlb and pagetable. I don't understand the association of the TLB to the streamed addresses/tags and page tables. a. 4669, 2227, 13916, 34587, 48870, 12608, 49225 b. 12948, 49419, 46814, 13975, 40004, 12707 TLB Valid Tag Physical Page Number 1 11 12 1 7 4 1 3 6 0 4 9 Page Table Valid Physical Page or in Disk 1 5 0 Disk 0 Disk 1 6 1 9 1 11 0 Disk 1 4 0 Disk 0 Disk 1 3 1 12 How does the TLB work with the pagetable and addresses? The homework question given is: Given the address stream in the table, and the initial TLB and page table states shown above, show the final state of the system also list for each reference if it is a hit in the TLB, a hit in the page table or a page fault. But I think first i just need to know how does the TLB work with these other elements and how to determine things. How do I even start to answer this question?

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• How to start a task before networking?

  - by user1252434

  I've written an upstart task that modifies /etc/network/interfaces. (Actually a file sourced into it.) Which start on condition do I need to declare to let my task run before any networking jobs? I've tried start on starting networking, but that's apparently too late. When I log in after booting I can see that the changes were written, but obviously they are not used: the new config states a static IP, but the boot process waits for a non-existing DHCP server (old config) to time out. I've also tried start on starting network-interface INTERFACE=eth0, which didn't work either. IIRC there was an error in the log that the change couldn't be written. Background: I need a VM template that can be cloned and the clones configured through a script. Among other settings, I need to give them a static IP address to access them from the host. I use guestfish to write a config file to one of the virtual disks and let a script apply these settings to the system. I don't want that disk to contain an actual system settings file. I can't modify /etc directly, because that disk is shared (copy-on-write/diff) among the clones and guestfish apparently doesn't support that type of image. I could also let them use DHCP and setup a server that assigns IP by MAC, but I'm afraid of the complexity. I could also add just another virtual disk for configuration files, but if possible I'd prefer to store settings directly on the system disk image. Used software: Ubuntu Server 12.04, VirtualBox. The configuration modifier is a self written ruby script.

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• Grid Infrastructure Management Repository (GIMR) database now mandatory in Oracle GI 12.1.0.2

  - by Mike Dietrich

  During the installation of Oracle Grid Infrastructure 12.1.0.1 you've had the following option to choose YES/NO to install the Grid Infrastructure Management Repository (GIMR) database MGMTDB: With Oracle Grid Infrastructure 12.1.0.2 this choice has become obsolete and the above screen does not appear anymore. The GIMR database has become mandatory.  What gets stored in the GIMR? See the documentation here See the changes in Oracle Clusterware 12.1.0.2 here: Automatic Installation of Grid Infrastructure Management Repository The Grid Infrastructure Management Repository is automatically installed with Oracle Grid Infrastructure 12c release 1 (12.1.0.2). The Grid Infrastructure Management Repository enables such features as Cluster Health Monitor, Oracle Database QoS Management, and Rapid Home Provisioning, and provides a historical metric repository that simplifies viewing of past performance and diagnosis of issues. This capability is fully integrated into Oracle Enterprise Manager Cloud Control for seamless management. Furthermore what the doc doesn't say explicitly: The -MGMTDB has now become a single-tenant deployment having a CDB with one PDB This will allow the use of a Utility Cluster that can hold the CDB for a collection of GIMR PDBs When you've had already an Oracle 12.1.0.1 GIMR this database will be destroyed and recreated Preserving the CHM/OS data can be acchieved with OCULMON to dump it out into node view The data files associated with it will be created within the same disk group as OCR and VOTING  In a future release there may be an option offered to put in into a separate disk group Some important MOS Notes: MOS Note 1568402.1FAQ: 12c Grid Infrastructure Management Repository, states there's no supported procedure to enable Management Database once the GI stack is configured MOS Note 1589394.1How to Move GI Management Repository to Different Shared Storage(shows how to delete and recreate the MGMTDB) MOS Note 1631336.1Cannot delete Management Database (MGMTDB) in 12.1 -Mike

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• Tip 13 : Kill a process using C#, from local to remote

  - by StanleyGu

  1. My first choice is always to try System.Diagnostics to kill a process 2. The first choice works very well in killing local processes. I thought the first choice should work for killing remote process too because process.kill() method is overloaded with second argument of machine name. I pass process name plus remote machine name and call the process.kill() method 3. Unfortunately, it gives me error message of "Feature is not supported for remote machines.". Apparently, you can query but not kill a remote process using Process class in System.Diagnostics. The MSDN library document explicitly states that about Process class: Provides access to local and remote processes and enables you to start and stop local system processes. 4. I try my second choice: using System.Management to kill a process running on a remote machine. Make sure add references to System.Management.dll and System.Management.Instrumentation.dll 5. The second choice works very well in killing a remote process. Just need to make sure the account running your program must be configured to have permission to kill a process running on the remote machine.  

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• LINQ: Single vs. SingleOrDefault

  - by Paulo Morgado

  Like all other LINQ API methods that extract a scalar value from a sequence, Single has a companion SingleOrDefault. The documentation of SingleOrDefault states that it returns a single, specific element of a sequence of values, or a default value if no such element is found, although, in my opinion, it should state that it returns a single, specific element of a sequence of values, or a default value if no such element is found. Nevertheless, what this method does is return the default value of the source type if the sequence is empty or, like Single, throws an exception if the sequence has more than one element. I received several comments to my last post saying that SingleOrDefault could be used to avoid an exception. Well, it only “solves” half of the “problem”. If the sequence has more than one element, an exception will be thrown anyway. In the end, it all comes down to semantics and intent. If it is expected that the sequence may have none or one element, than SingleOrDefault should be used. If it’s not expect that the sequence is empty and the sequence is empty, than it’s an exceptional situation and an exception should be thrown right there. And, in that case, why not use Single instead? In my opinion, when a failure occurs, it’s best to fail fast and early than slow and late. Other methods in the LINQ API that use the same companion pattern are: ElementAt/ElementAtOrDefault, First/FirstOrDefault and Last/LastOrDefault.

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• Welcome to JavaOne!

  - by marius.ciortea

  Welcome to this year's JavaOne conference! We are glad you dropped by. We want to keep you informed of all the happenings around JavaOne: all the events leading up to the conference and all the events during the conference week itself. We'll cover announcements, news, planning (but we won't make you go to any meetings), and snafus (nothing that makes us look too bad, of course). We'll even throw in a contest or two to make sure you are paying attention. We'll post a couple of times a week, and then more frequently as we get closer to September. There's a group of us, and we cover the Java beat, JUGs, Oracle Technology Network, Oracle Solaris, and lots more. What do you want to hear about? Let us know.A group of us from the office went to see the movie Iron Man 2 (it just debuted in the United States) last week and it reminded us of Java, the Java community, and JavaOne. In all three cases, from many disparate (and sometimes seemingly incompatible) parts and people, something comes together that works, is cool, and helps make a better world. Right now, there are hundreds of little islands of planning, all busy answering questions for JavaOne: What sessions get selected? What goes in the Mason street tent (until a few weeks ago, Will there be a tent on Mason street?), What do the JUGS need? Which Oracle ACEs will be there? Can we do a surf theme at the OTN party? And, somehow, like an Iron Man suit, they all come together and work to make a great event. At least, we hope it will be great. That's for you to decide. Please don't be shy--give us your comments and suggestions. We'll be listening.P.S. You can attend Stark Expo online at Oracle.com/ironman2, where you can train to become a "Master Cloud Operative." I got my MCO certification. I wish I had a card to put in my wallet.

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• Intellectual Property for in house development

  - by Kyle Rogers

  My company is a sub contractor on a major government contract. Over the past 5 years we've been developing in house applications to help support our company and streamline our work. Apparently in 2008 our president of the company at that time signed a continuation of services contract with the company we subcontract with on this project. In the contract amendment various things were discussed such as intellectual property and the creation of new and existing tools. The contract states that all the subcontractor's tools/scripts/etc... become the intellectual property of the main contractor holder. Basically all tools that were created in support of the project which we work on are no longer ours exclusively and they have rights to them. My company really doesn't do software development specifically but because of this contract these tools helped tremendously with our daily tasking. Does my company have any sort of recourse or actions to help keep our tools? My team of developers were completely unaware of any of these negotiations and until recently were kept in the dark about the agreements that were made. Do we as developers have any rights to the software? Since our company is not a software development shop, we have created all these tools without any sort of agreements or contracts within the company stating that we give our company full rights to our creations? I was reading an article by Joel Spolsky on this topic and was just wonder if there is any advice out there to help assist us? Thank you Joel Spolsky's Article

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• SQLAuthority News – Resolution for New Year 2011

  - by pinaldave

  Today is the first day of the year so I want to write something very light. Last Year: 2010 Last Year was a blast; really traveled a lot. My family and I went on vacation. There I enjoyed being father, rolling on the floor and playing with my daughter. Here is the list of the countries I visited throughout 2010: Singapore (twice) Malaysia (twice) Sri Lanka (thrice) Nepal (once) United States of America (twice) United Arab Emirates (UAE) (once) My daughter who just completed 1 year on September 1, 2010 has so far visited three countries: Singapore, Malaysia and Sri Lanka, where I have done lots of community activities. The list containing all my activities can be found at Pinal Dave’s Community Events. I have written nearly 380 blog posts last year. It would be difficult for me to pick a few. However, I keep a running list of all of my articles over here: All Articles on SQLAuthority.com. I have so far received more than 10,000 email questions during the year and consequently I have done my best to answer most of them. I strongly believe if one would Search SQLAuthority.com blog, they would have found the answer quickly. The best part of 2010 for me was working on SQL Server Health Check and SQL Server Performance Tuning. This Year: 2011 This year, I came up with two simple goals: 1. Personal Goal: Reduce Weight 2. Professional Goal: Stay busy for the entire year with SQL Server Performance Tuning Projects. (Currently January 2011 is booked with performance tuning projects and 40 other days are already booked throughout the year). Future The future is something one cannot exactly guess and one cannot see. I just want to wish all of you the very best for this coming New Year. Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: About Me, Pinal Dave, PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, SQLAuthority News, T SQL, Technology

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• javascript fixed timestep gameloop with requestanimation frame

  - by coffeecup

  hello i just started to read through several articles, including http://gafferongames.com/game-physics/fix-your-timestep/ ...://gamedev.stackexchange.com/questions/1589/fixed-time-step-vs-variable-time-step/ ...//dewitters.koonsolo.com/gameloop.html ...://nokarma.org/2011/02/02/javascript-game-development-the-game-loop/index.html my understanding of this is that i need the currentTime and the timeStep size and integrate all states to the next state the time which is left is then passed into the render function to do interpolation i tried to implement glenn fiedlers "the final touch", whats troubling me is that each FrameTime is about 15 (ms) and the update loop runs at about 1500 fps which seems a little bit off? heres my code this.t = 0 this.dt = 0.01 this.currTime = new Date().getTime() this.accumulator = 0.0 this.animate() animate: function(){ var newTime = new Date().getTime() , frameTime = newTime - this.currTime , alpha if ( frameTime > 0.25 ) frameTime = 0.25 this.currTime = newTime this.accumulator += frameTime while (this.accumulator >= this.dt ) { this.prev_state = this.curr_state this.update(this.t,this.dt) this.t += this.dt this.accumulator -= this.dt } alpha = this.accumulator / this.dt this.render( this.t, this.dt, alpha) requestAnimationFrame( this.animate ) } also i would like to know, are there differences between glenn fiedlers implementation and the last solution presented here ? gameloop1 gameloop2 [ sorry couldnt post more than 2 links.. ] edit : i looked into it again and adjusted the values this.currTime = new Date().getTime() this.accumulator = 0 this.p_t = 0 this.p_step = 1000/100 this.animate() animate: function(){ var newTime = new Date().getTime() , frameTime = newTime - this.currTime , alpha if(frameTime > 25) frameTime = 25 this.currTime = newTime this.accumulator += frameTime while(this.accumulator >= this.p_step){ // prevstate = currState this.update() this.p_t+=this.p_step this.accumulator -= this.p_step } alpha = this.accumulator / this.p_step this.render(alpha) requestAnimationFrame( this.animate ) now i can set the physics update rate, render runs at 60 fps and physics update at 100 fps, maybe someone could confirm this because its the first time i'm playing around with game development :-)

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• Get to Know a Candidate (15 of 25): Jerry White&ndash;Socialist Equality Party

  - by Brian Lanham

  DISCLAIMER: This is not a post about “Romney” or “Obama”. This is not a post for whom I am voting. Information sourced for Wikipedia. White (born Jerome White) is an American politician and journalist, reporting for the World Socialist Web Site.  White's Presidential campaign keeps four core components: * International unity in the working class * Social equality * Opposition to imperialist militarism and assault on democratic rights * Opposition to the political subordination of the working class to the Democrats and Republicans The White-Scherrer ticket is currently undergoing a review by the Wisconsin election committee concerning the ballot listing of the party for the 2012 Presidential elections. White has visited Canada, Germany, and Sri Lanka to campaign for socialism and an international working class movement. The Socialist Equality Party (SEP) is a Trotskyist political party in the United States, one of several Socialist Equality Parties around the world affiliated to the International Committee of the Fourth International (ICFI). The ICFI publishes daily news articles, perspectives and commentaries on the World Socialist Web Site. The party held public conferences in 2009 and 2010. It led an inquiry into utility shutoffs in Detroit, Michigan earlier in 2010, after which it launched a Committee Against Utility Shutoffs. Recently it sent reporters to West Virginia to report on the Upper Big Branch Mine disaster and the way that Massey Energy has treated its workers. It also sent reporters to the Gulf Coast to report on the Deepwater Horizon oil spill. In addition, it has participated in elections with the aim of opposing the American occupation of Iraq and building a mass socialist party with an international perspective. Despite having been active for over a decade, the Socialist Equality Party held its founding congress in 2008, where it adopted a statement of principles and a historical document. White has Ballot Access in: CO, LA, WI Learn more about Jerry White and Socialist Equality Party on Wikipedia

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