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• How to analyze a scenario where a bug didn't get caught and adjust development workflow to prevent similar errors

  - by durron597

  I had a bug that was really difficult to track down, because all the unit tests were green, but the production application didn't work properly. Here's what happened: I had a filter class that set my application to ignore data that was not in some specified time windows. The unit test, which seemed thorough to me, turned green. Additionally, my integration tests also produced results as expected. Production, however, did not work. As a result of the first two bullets, this problem was very difficult to find. It turned out the problem was that my test dates were using my time zone (America/Chicago) but the production data was providing dates in UTC, which I did not realize, and the logic for the filter wasn't correct for UTC dates. (I was using joda time DateTime objects). Where did my workflow break down? Did I fail to produce a spec that specified that the logic needed to handle dates in any time zone? Did I fail to thoroughly consider all cases at the unit test level? Did I fail to insure the integration test was sufficiently similar to production? Other? What changes can I make to my workflow to better prevent this sort of mistake in the future? How can I more effectively debug a problem when there is an issue in production but not in testing?

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• Review: Data Modeling 101

  I just recently read “Data Modeling 101”by Scott W. Ambler where he gave an overview of fundamental data modeling skills. I think this article was excellent for anyone who was just starting to learn or refresh their skills in regards to the modeling of data.  Scott defines data modeling as the act of exploring data oriented structures.  He goes on to explain about how data models are actually used by defining three different types of models. Types of Data Models Conceptual Data Model  Logical Data Model (LDMs) Physical Data Model(PDMs) He further expands on modeling by exploring common data modeling notations because there are no industry standards for the practice of data modeling. Scott then defines how to actually model data by expanding on entities, attributes, identities, and relationships which are the basic building blocks of data models. In addition he discusses the value of normalization for redundancy and demoralization for performance. Finally, he discuss ways in which Developers and DBAs can become better data modelers through the use of practice, and seeking guidance from more experienced data modelers.

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• Drive project success & financial performance with business critical Enterprise Project Portfolio Management

  - by Sylvie MacKenzie, PMP

  Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman","serif";} Oracle Primavera invites you to the first in a series of three webcasts linking Enterprise Project Portfolio Management with enhanced operational performance and better financial results. Few organizations fully understand the impact projects have on their business. Consistently delivering successful projects is vital to the financial success of an asset intensive organization. Enterprise Project Portfolio Management (EPPM) is not a new concept yet for many organizations it is not considered "business critical". Webcast 1: Plan – Aligning project selection and prioritization with corporate objectives This webcast will look at 2 key questions: Are you aligning portfolio decisions with strategic objectives? How do you effectively measure the success of your portfolio decisions? Hear from Accenture who'll present a compelling case for why asset intensive organizations should consider EPPM as business critical. They'll explore: How technology is being used to enhance project delivery How collaboration enhances delivery performance The major challenges associated with the planning phase of a project Next hear from Geoff Roberts, Industry Strategist from Oracle Primavera. With over 30 years experience in project management/project controls in the construction, utilities and oil & gas sectors, Geoff will investigate how EPPM is a best practice and can support an organization through project selection and prioritization ensuring that decisions are aligned with corporate objectives. Don’t miss out, register today!

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• OpenGL CPU vs. GPU

  - by Nitrex88

  So I've always been under the impression that doing work on the GPU is always faster than on the CPU. Because of this, in OpenGL, I usually try to do intensive tasks in shaders so they get the speed boost from the GPU. However, now I'm starting to realize that some things simply work better on the CPU and actually perform worse on the GPU (particularly when a geometry shader is involved). For example, in a recent project I did involving procedurally generated terrain, I tried passing a grid of single triangles into a geometry shader, and tesselated each of these triangles into quads with 400 vertices whose height was determined by a noise function. This worked fine, and looked great, but easily maxed out the GPU with only 25 base triangles and caused a very slow framerate. I then discovered that tesselating on the CPU instead, and setting the height (using noise function) in the vertex shader was actually faster! This prompted me to question the benefits of using the GPU as much as possible... So, I was wondering if someone could describe the general pros and cons of using the GPU vs CPU for intensive graphics tasks. I know this mainly comes down to what your trying to achieve, so if necessary, use the above scenario to discuss why the "CPU + vertex shader" was actually faster than doing everything in the geometry shader on the GPU. It's possible my hardware (newest macbook pro) isn't optomized well for the geometry shader (thus causing the slow framerate). Also, I read that the vertex shader is very good with parallelism, and would love a quick explanation of how this may have played a role in speeding up my procedural terrain. Any info/advice about CPU/GPU/shaders would be awesome!

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• Whats the greatest most impressive programing feat you ever witnessed? [closed]

  - by David Reis

  Everyone knows of the old adage that the best programmers can be orders of magnitude better than the average. I've personally seen good code and programmers, but never something so absurd. So the questions is, what is the most impressive feat of programming you ever witnessed or heard of? You can define impressive by: The scope of the task at hand e.g. John single handedly developed the framework for his company, a work comparable in scope to what the other 200 employed were doing combined. Speed e.g. Stu programmed an entire real time multi-tasking app OS on an weekened including its own C compiler and shell command line tools Complexity e.g. Jane rearchitected our entire 10 millon LOC app to work in a cluster of servers. And she did it in an afternoon. Quality e.g. Charles's code had a rate of defects per LOC 100 times lesser than the company average. Furthermore he code was clean and understandable by all. Obviously, the more of these characteristics combined, and the more extreme each of them, the more impressive is the feat. So, let me have it. What's the most absurd feat you can recount? Please provide as much detail as possible and try to avoid urban legends or exaggerations. Post only what you can actually vouch for. Bonus questions: Was the herculean task a one-of, or did the individual regularly amazed people? How do you explain such impressive performance? How was the programmer recognized for such awesome work?

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• CodePlex Daily Summary for Thursday, March 08, 2012

  CodePlex Daily Summary for Thursday, March 08, 2012Popular ReleasesMetodología General Ajustada - MGA: 02.01.01: Cambios John: Se modifica el instalador para solucionar problema de restauración detectado en sistemas Windows Vista que hacen que el backup busque el mismo archivo de nombre de cuando se creó la copia de seguridad. Para el caso, como se creó con MGA_Distribucion, así mismo lo intentaba buscar al restaurar, cuando en realidad estaba solo MGA en SQL Express.EntitiesToDTOs - Entity Framework DTO Generator: EntitiesToDTOs.v2.1: Changelog Fixed template file access issue on Win7. Fix on configuration load when target project was not found and "Use project default namespace" was checked. Minor fix on loading latest configuration at startup. Minor fix in VisualStudioHelper class. DTO's properties accessors are now in one line. Improvements in PropertyHelper to get a cleaner and more performant code. Added Website project type as a not supported project type. Using Error List pane from VS IDE to show Enti...DotNetNuke® Community Edition CMS: 06.01.04: Major Highlights Fixed issue with loading the splash page skin in the login, privacy and terms of use pages Fixed issue when searching for words with special characters in them Fixed redirection issue when the user does not have permissions to access a resource Fixed issue when clearing the cache using the ClearHostCache() function Fixed issue when displaying the site structure in the link to page feature Fixed issue when inline editing the title of modules Fixed issue with ...Mayhem: Mayhem Developer Preview: This is the developer preview of Mayhem. Enjoy!Team Foundation Server Process Template Customization Guidance: v1 - For Visual Studio 11: Welcome to the BETA release of the Team Foundation Server Process Template Customization preview. As this is a BETA release and the quality bar for the final Release has not been achieved, we value your candid feedback and recommend that you do not use or deploy these BETA artifacts in a production environment. Quality-Bar Details Documentation has been reviewed by Visual Studio ALM Rangers Documentation has not been through an independent technical review Documentation has not been rev...Magelia WebStore Open-source Ecommerce software: Magelia WebStore 1.2: Medium trust compliant lot of small change for medium trust compliance full refactoring of user management refactoring of Client Refactoring of user management Magelia.WebStore.Client no longer reference Magelia.WebStore.Services.Contract Refactoring page category multi parent category added copy category feature added Refactoring page catalog copy catalog feature added variant management improvement ability to define a default variant for a variable product ability to ord...StackBuilder: StackBuilder 1.0.5.0: + Added Collada/WebGL export to show 3D animation of pallet solutions...Delta Engine: Delta Engine Beta Preview v0.9.4: v0.9.4 is the release for February 2012, but it was delayed till 2012-03-07 until content generation worked much better for v0.9.4. The main improvements were done on the server side (content generation and improved build support for iOS and Android). v0.9.4 is also the first version everyone can use to deploy their application onto all supported platforms, see Marketplace Licensing for details: http://deltaengine.net/Marketplace Documentation for this version can be found at: http://help.de...PDFsharp - A .NET library for processing PDF: PDFsharp and MigraDoc Foundation 1.32: PDFsharp and MigraDoc Foundation 1.32 is a stable version that fixes a few bugs that were found with version 1.31. Version 1.32 includes solutions for Visual Studio 2010 only (but it should be possible to add the project files to existing solutions for VS 2005 or VS 2008). Users of VS 2005 or VS 2008 can still download version 1.31 with the solutions for those versions that allow them to easily try the samples that are included. While it may create smaller PDF files than version 1.30 because...Terminals: Version 2.0 - Release: Changes since version 1.9a:New art works New usability in Organize favorites window Improved usability of imports/exports and scans Large number of fixes Improvements in single instance mode Comparing November beta 4, this corrects: New application icons Doesn't show Logon error codes Fixed command line arguments exception for single instance mode Fixed detaching of tabs improved usability in detached window Fixed option settings for Capture manager Fixed system tray noti...AutoLoL: AutoLoL v2.1.5: Updated version of Autolol that works with the Fiora patch.MFCMAPI: March 2012 Release: Build: 15.0.0.1032 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 BadgeTortoiseHg: TortoiseHg 2.3.1: bugfix releaseCommonLibrary: Code: CodePowerGUI Visual Studio Extension: PowerGUI VSX 1.5.2: Added support for PowerGUI 3.2.VidCoder: 1.3.1: Updated HandBrake core to 0.9.6 release (svn 4472). Removed erroneous "None" container choice. Change some logic and help text to stop assuming you have to pick the VIDEO_TS folder for a DVD scan. This should make previewing DVD titles on the Queue Multiple Titles window possible when you've picked the root DVD directory.ExtAspNet: ExtAspNet v3.1.0: ExtAspNet - ?? ExtJS ??? ASP.NET 2.0 ???，????? AJAX ?????????? ExtAspNet ????? ExtJS ??? ASP.NET 2.0 ???，????? AJAX ??????????。 ExtAspNet ??????? JavaScript，?? CSS，?? UpdatePanel，?? ViewState，?? WebServices ???????。 ??????: IE 7.0, Firefox 3.6, Chrome 3.0, Opera 10.5, Safari 3.0+ ????：Apache License 2.0 (Apache) ??：http://extasp.net/ ??：http://bbs.extasp.net/ ??：http://extaspnet.codeplex.com/ ??：http://sanshi.cnblogs.com/ ????： +2012-03-04 v3.1.0 -??Hidden???????（〓?〓）。 -?PageManager??...AcDown????? - Anime&Comic Downloader: AcDown????? v3.9.1: ?? ●AcDown??????????、??、??????，????1M，????，????，?????????????????????????。???????????Acfun、????(Bilibili)、??、??、YouTube、??、???、??????、SF????、????????????。??????AcPlay?????，??????、????????????????。 ● AcDown???????????????????????????，???，???????????????????。 ● AcDown???????C#??，????.NET Framework 2.0??。?????"Acfun?????"。 ????32??64? Windows XP/Vista/7/8 ????????????? ??：????????Windows XP???,?????????.NET Framework 2.0???(x86)，?????"?????????"??? ??????????????，??????????： ??"AcDo...Media Companion: MC 3.433b Release: General More GUI tweaks (mostly imperceptible!) Updates for mc_com.exe TV The 'Watched' button has been re-instigated Added TV Menu sub-option to search ALL for new Episodes (includes locked shows) Movies Added 'Source' field (eg DVD, Bluray, HDTV), customisable in Advanced Preferences (try it out, let us know how it works!) Added HTML <<format>> tag with optional parameters for video container, source, and resolution (updated HTML tags to be added to Documentation shortly) Known Issu...Picturethrill: Version 2.3.2.0: Release includes Self-Update feature for Picturethrill. What that means for users is that they are always guaranteed to have a fresh copy of Picturethrill on their computers with all latest fixes. When Picturethrill adds a new website to get pictures from, you will get it too!New Projects1906Ultras for Windows Phone: This is a supporters group applicationActivities.Web: WF4 ?????? web ????????????????? Activities library related web, available in WF4 Alternative ColorConverter: Alternative ColorConverter is just a little better ColorConverter which inherits from System.Drawing.ColorConverter. Alternative ColorConverter re-implements the ConvertFromString method to support more color formats such as "255, 11, 22, 33"(a,r,g,b), "11, 22, 33"(r,g,b), "#0056ef"(#rgb), "#05e"(#rgb), etc.Asp.Net development: asp.net MVC Jquery Javascript Silverlight web servicesBusQ: BusQ makes it easier for developers to work with Azure Service Bus Queues. You'll no longer have to create Topic or Queue receivers to listen for messages. It's developed in C#.Comarch Animation Framework: Code-based animation framework for Silverlight and WPFÐ? án môn l?p trình game: Game dàn tr?n theo lu?tMovieSort: MovieSort is in the early stage of development.MVC Bootstrap: A project that should help kick-start new MVC projects with basic, needed features - entity framework, dependency injection, asynchronously task handling, EF membership provider and lots more. OGrilsSellSys: sellPermutationGenerator: PermutationGeneratorSharePoint Database Information Integration Web Part Suite: The SharePoint Database Web Part Suite helps you to integrate your database information into SharePoint like any other ordinary SharePoint List. The Web Part Suite supports list views and detail dialogs to modify or to create new database entries. To bring data into the SharePoint Interface only three steps are necessary: 1. Put the Web Part onto a SharePoint Page 2. Configure the Database Connection settings 3. Setup the list view columns Ready. It is possible to define for each refere...Silverlight application using Arcgis Server 2010: Arcgis Server 10 , Silverlight , Asp.Net , Arcgis APItestingemail: testingemailTomSweet: this is a blog template ,welcome every one modify it ,make it strongerVirtual School: Escola virtual descentralizadaxCoder Project: xCoder Project is a solution for Auto-Generating project files, C# Code files from an existing DataBase. xConnected: Experts Connected NetworkXRDTech: XRDTech ProjectZomato API Managed Wrapper for .NET: Managed wrapper for the Zomato.com REST API, which can be used to retrieve restaurant information for the major cities in India. Available for both the .NET Framework and Silverlight for Windows Phone.

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• Creating country specific twitter/facebook accounts

  - by user359650

  I see many companies that have an international presence trying to localize their social media presence by creating country or language specific accounts. However some seemed to have done so without following a consistent pattern, one example being the World Wildlife Fund when you look at their Twitter accounts: World_Wildlife : verified account with 200K followers WWF : main account with 800K followers www_uk : lower case with underscore between WWF and country indicator WWFCanada : upper case with country indicator attached to WWF ... I am planning to build a website which hopefully will grow global and would like to avoid this sort of inconsistencies. Also, I was comparing what Twitter and Facebook allow in their username and found out that they don't allow the same characters to be used (e.g. for instance that the former doesn't allow . whereas the latter does) making difficult to ensure consistency across social networks. Hence my questions: Are there known naming schemes for creating localized Twitter and Facebook accounts while maintaining a certain consistency between them (best effort)? Are there any researches out there that have proven whether some schemes were better than others in terms of readability and/or SEO?

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• Kinect will recognise your finger movement

  - by Boonei

  Sources inside Microsoft suggest they MS guys are tying to improve motion controller. This could be a huge boost to gaming. There are quite a few things that we can do with our fingers when playing games like driving, shooting,sports etc. If fingers are captured then  XBox will give more realistic version of our avatar. Eurogamer has also suggested the same according to their sources. It would be only(mostly) a software update and would not require a new camera, because the USB controller interface currently in place in Kinect can take in data up-to 35MBps. The current utilization is only around roughly 1/2 of it. So there is currently a facility to send more data. Little more tech data, Kinect does transmit 320×240-pixel in 30 fps, if the device could capture and transfer at 640×480 pixels, then better resolution can detect more movements compared to current level of detection. Lets wait and watch ! This article titled,Kinect will recognise your finger movement, was originally published at Tech Dreams. Grab our rss feed or fan us on Facebook to get updates from us.

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• How to optimize sandboxie for faster application loading

  - by user23950

  I'm referring to this one: http://www.sandboxie.com/index.php?DownloadSandboxie Do you know of any alternatives that might be better than this software. And if you don't know of any alternative. Can you show me how can I make it faster to load firefox. Or any other browser. Because it really makes application incredibly slow at loading when you run them inside a sandbox. I've also seen lots from here: http://superuser.com/questions/57129/alternative-to-sandboxie-for-64-bit-systems Do you know of any other?

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• Browsers ignoring hosts file

  - by madkris

  Until recently my browsers started to ignore my hosts file. I have Windows 7 operating system installed. 192.168.0.5 livesite.com I have tried: Clearing browser cache Issued "ipconfig /flushdns" from the command line Issued "ping livesite.com" from the command line (response was "Reply from 192.168.0.5: bytes=32 time=1ms TTL=128") Restarting unit Backing up original hosts file and making a new one Checking lmhosts.sam (everything is commented out) Connecting directly to modem using cable Checked \HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\DataBasePath Tried it on another laptop with exactly the specs as I have Then I tried Changing entry to "127.0.0.1 livesite.com" (ping ok, browser ok) Changing entry to "192.168.0.5 livesite.com" (ping ok, browser ok but only for a sec) Issued "ipconfig /flushdns" from the command line (ping ok, browser not ok) Changing entry to "127.0.0.1 livesite.com" (ping ok, browser ok) Changing entry to "192.168.0.5 livesite.com" (ping ok, browser not ok) Issued "ipconfig /flushdns" from the command line (ping ok, browser not ok) Any idea why it worked for a moment? Or better yet anything I havent tried or some error I may have overlooked?

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• Browsers ignoring hosts file

  - by madkris

  Until recently my browsers started to ignore my hosts file. I have Windows 7 operating system installed. 192.168.0.5 livesite.com I have tried: Clearing browser cache Issued "ipconfig /flushdns" from the command line Issued "ping livesite.com" from the command line (response was "Reply from 192.168.0.5: bytes=32 time=1ms TTL=128") Restarting unit Backing up original hosts file and making a new one Checking lmhosts.sam (everything is commented out) Connecting directly to modem using cable Checked \HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\DataBasePath Tried it on another laptop with exactly the specs as I have Then I tried Changing entry to "127.0.0.1 livesite.com" (ping ok, browser ok) Changing entry to "192.168.0.5 livesite.com" (ping ok, browser ok but only for a sec) Issued "ipconfig /flushdns" from the command line (ping ok, browser not ok) Changing entry to "127.0.0.1 livesite.com" (ping ok, browser ok) Changing entry to "192.168.0.5 livesite.com" (ping ok, browser not ok) Issued "ipconfig /flushdns" from the command line (ping ok, browser not ok) Any idea why it worked for a moment? Or better yet anything I havent tried or some error I may have overlooked?

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• Storing data for use on Android and Windows Applications

  - by Andy Mepham

  I posted this last night on StackOverflow and was advised to move it over to StackExchange, thank you for taking a moment to look at my question. I'm developing a project proposal for my final year project at University and as I aim to use programming languages I am currently not too familiar with I'm looking for some guidance - I can't include details of my project but hopefully you will understand what I'm after. I'm going to be creating an Android application (in Java) and a Windows Application (in C#) that will ideally access, query and update a remotely hosted Database or set of XML files (this would most likely be over the Internet). I've done some looking around the internet and SQLite seems like a safe-bet for cross-platform manipulation of the database; however I would like to keep the system as lightweight as possible and I'm wondering whether XML files may provide a better alternative? Anyone out there that has experience using SQLite and/or remotely hosted XML for the purposes of Android and/or C# development that could point me in the right direction? If there is an alternative solution other than those I have mentioned I would be interested to hear about them too. Thank you for taking the time to read my question. Edit: The purpose of this application is for a small scale business, the data source would not need to be updated by more than one source but may be view from multiple sources (i.e. through multiple phones and a desktop PC). The database wouldn't be updating masses of data at a time (most likely single rows of a few tables at the most).

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• Should I pick up a functional programming language?

  - by Statement

  I have recently been more concerned about the way I write my code. After reading a few books on design patterns (and overzealous implementation of them, I'm sure) I have shifted my thinking greatly toward encapsulating that which change. I tend to notice that I write less interfaces and more method-oriented code, where I love to spruce life into old classes with predicates, actions and other delegate tasks. I tend to think that it's often the actions that change, so I encapsulate those. I even often, although not always, break down interfaces to a single method, and then I prefer to use a delegate for the task instead of forcing client code to create a new class. So I guess it then hit me. Should I be doing functional programming instead? Edit: I may have a misconception about functional programming. Currently my language of choice is C#, and I come from a C++ background. I work as a game developer but I am currently unemployed. I have a great passion for architecture. My virtues are clean, flexible, reusable and maintainable code. I don't know if I have been poisoned by these ways or if it is for the better. Am I having a refactoring fever or should I move on? I understand this might be a question about "use the right tool for the job", but I'd like to hear your thoughts. Should I pick up a functional language? One of my fear factors is to leave the comfort of Visual Studio.

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• The Other "C" in CRM

  - by [email protected]

  By Brian Dayton on April 5, 2010 7:04 PM Folks who know me know that I rarely, if ever, talk politics. And I never talk politicians. Having grown up in a household with one parent leaning left and the other leaning to the right it was the best way to keep the peace. This isn't about politics. It's about "constituents" and the need to improve the services and service levels for people--at the city, county, state/province, etc. level all the way up to national governments. As a citizen and tax payer it's also important to me that these services be provided at a reasonable cost. If there's a better and more efficient way to do something then it's my hope that a public sector organization takes advantage of technology the same way private sector companies do. Social services organizations have a complex job. They provide the services that people need, from healthcare and children's assistance to helping people find jobs. But many of these organizations are still managing these processes manually or outdated, home-grown applications that could have been written up to 30 years ago. A lot has changed in technology. On the (this is as political as I'm going to get) political front, stakeholders like you and me are expecting greater transparency on where and how funds are spent. I'll admit that most of the time, when I think about CRM systems, I think about my experience as a customer of my bank, utilities company or cable operator. But now that I'm older, have children and a house--I find myself interacting more and more with agencies and services organizations. My experiences are sometimes good and sometimes not so good. Along those lines, last week's announcement of Siebel CRM 8.2 for Public Sector caught my eye. You may not work in the public sector, but you are a constituent of some--actually a lot--of public sector organizations. I don't know which CRM systems city and county utilize but I'm going to start paying closer attention.

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• Limited RGB range due to HDMI cable?

  - by Cedric Reichenbach

  I have a NVidia GeForce GTX 660, connected to a Samsung SyncMaster S24B350 through a HDMI cable. On my computer, I'm running both, Windows 8 and Linux Mint. I think that something might prevent my system from using the whole RGB spectrum, since bright colors seem to vanish into white under standard settings. However, under Linux I could switch to a limited color range mode (16-235) and suddenly, the image looked much better. Is it possible that the HDMI cable limits color range (since it was originally inteded for TVs)? Is there a way of switching to limited color range mode in Windows 8 as well?

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• Automatically generated /etc/hosts is wrong

  - by Niels Basjes

  I've created a kickstart script to install CentOS 5.5 (32bit) in a fully automated way. The DNS/DHCP setup correctly gives the system the right hostname in both the forward and reverse lookups. dig node4.mydomain.com. +short 10.10.10.64 dig -x 10.10.10.64 +short node4.mydomain.com. In the state the installed system is right after the installation completed is as follows: cat /etc/sysconfig/network NETWORKING=yes NETWORKING_IPV6=yes GATEWAY=10.10.10.1 HOSTNAME=node4.mydomain.com echo ${HOSTNAME} node4.mydomain.com cat /etc/hosts # Do not remove the following line, or various programs # that require network functionality will fail. 127.0.0.1 localhost.localdomain localhost ::1 localhost6.localdomain6 localhost6 10.10.10.64 node4 My problem is that this automatically generated hosts file is slightly different from the way I want it (or better: the way Hadoop wants it). The last line should look like this: 10.10.10.64 node4.mydomain.com node4 What do I modify where to fix this? Thanks.

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• When using TCP load balancing with HAProxy, does all outbound traffic flow through the LB?

  - by user122875

  I am setting up an app to be hosted using VMs(probably amazon, but that is not set in stone) which will require both HTTP load balancing and load balancing a large number(50k or so if possible) of persistant TCP connections. The amount of data is not all that high, but updates are frequent. Right now I am evaluating load balancers and am a bit confused about the architecture of HAProxy. If I use HAProxy to balance the TCP connections, will all the resulting traffic have to flow through the load balancer? If so, would another solution(such as LVS or even nginx_tcp_proxy_module) be a better fit?

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• How should I deal with user agent parsing in logs?

  - by Mr. Jefferson

  My web app project includes logging functionality so we can see where visitors are coming from (referrer URL), what the popular user agents are, what pages are most popular, etc. The log is stored in SQL Server, and when I query the user agents I use a large (almost 100 lines) and growing CASE statement to separate the user agents using string matching (i.e. if the user agent contains the string "Firefox/9" then it's Firefox 9). Is there a better way to do this so I don't have to continually add to that CASE statement to deal with new browser releases? Also, how should I deal with less common, weird/unknown user agents? I've seen the following in the logs and been unable to find good information online about what they are: WordPress/3.3.1; http://www.facecolony.org Mozilla/4.0 ( http://www.hairirons.org redips; <a href=http://hairirons.org/>chi hair iron</a>) I'd guess they're bots/crawlers, but the sites they point to don't appear to reference web crawlers (or even be available sometimes). I've seen other user agents aren't familiar to me, but I know they're bots because they include "bot" or "spider" or something similar in them.

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• Why mutt terminates with segmentation error?

  - by hugemeow

  I pressed $, in order to sync mailbox, but mutt just quit... in fact mutt don't quit every time i press $, it only quits sometimes, so how to know the reason why mutt quit? is this a bug in mutt'? The error message is: Sorting mailbox... Segmentation fault Can i use strace with mutt if i want to know what happens? Or are there tools which are better to find out more about the problem? right now i replied to a mail, then i press $, then segmentation fault...

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• Is it recommended to use more than one language at a startup?

  - by GoofyBall

  I work for a mobile startup where, for historical reasons, our chosen language was C#. I was recently assigned to a small project to build a tool that would be used by us internally. When I explained my intention to use Python to build this tool I was heavily criticized for this because introducing new languages, and technologies (Debian, Apache, Python and Django) into our ecosystem would make it harder for other developers to maintain (because only two other people know more than one language besides C#). I countered that this project would take far longer to develop in C# (which I think is an inherent problem with the language/.NET framework) and that the project was small and designed to solve a very particular problem. Of course it is necessary that the ecosystem be as a homogeneous as possible but if your are developing tooling, infrastructure, and internal systems when there are better things to build them with than C# then you should consider using them. By using one language you exclude a lot of other great libraries and frameworks out there, and this case it was the difference between taking one week to build in Python as opposed to a month in C#. Do you think it is acceptable to understand and use only only one language at a startup or even a larger company? Am I perhaps being naive??

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• Leveraging Code in Ever Bigger Games

  - by ashes999

  Summary: The same way that I continually build complex engines and libraries within a single platform and technology to allow me to build increasingly bigger and better games, how to continue this when development crosses into different platforms? If I switch platforms, how do I leverage past code and experiences? Games are hard to build. Big games are even harder to build. I've decided that to be able to make big games, I need to start building smaller games, and building up an asset base of code, assets (graphics, sounds), tools, and most importantly, game engines, so that I can eventually get there. One game at a time. Let me give an analogy. To build an MMO 3D RPG, I would approach this by building and releasing small games with increasingly more features. This could entail, for example: A simple 2D game A tile-based game A game with RPG elements (items, equipment, monsters, battle) A full-fledged RPG A 3D RPG The problem now is if I have to change platforms or tools, I don't know how to leverage past code-bases (and experience) to start with a mature product. Right now, I'm writing Silverlight (FlatRedBall) games. Let's say I stick with this for ten years, and then suddenly decide to write a PS6 game, which is in a different programming language entirely. Granted, I have ten years of game-development experience (and correspondingly ten years of professional software development experience from my day job) to back me up. But I would still like some way to transplant that 2D RPG engine into the new programming language, or else leverage it somehow. Is this even possible? What are my options?

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• Performance of concurrent software on multicore processors

  - by Giorgio

  Recently I have often read that, since the trend is to build processors with multiple cores, it will be increasingly important to have programming languages that support concurrent programming in order to better exploit the parallelism offered by these processors. In this respect, certain programming paradigms or models are considered well-suited for writing robust concurrent software: Functional programming languages, e.g. Haskell, Scala, etc. The actor model: Erlang, but also available for Scala / Java (Akka), C++ (Theron, Casablanca, ...), and other programming languages. My questions: What is the state of the art regarding the development of concurrent applications (e.g. using multi-threading) using the above languages / models? Is this area still being explored or are there well-established practices already? Will it be more complex to program applications with a higher level of concurrency, or is it just a matter of learning new paradigms and practices? How does the performance of highly concurrent software compare to the performance of more traditional software when executed on multiple core processors? For example, has anyone implemented a desktop application using C++ / Theron, or Java / Akka? Was there a boost in performance on a multiple core processor due to higher parallelism?

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• Best practice? Using DPM to backup VMs within each VM or through the host?

  - by andrew

  We've got two Hyper-V hosts running multiple VMs (all flavors of Windows Servers). One of the VMs is running MS Data Protection Manager 2010, which runs beautifully (most of the time) and is connected to a separate NAS via iSCSI for the DPM storage. I noticed when I installed the DPM agent on the Hyper-V hosts, it enumerates the VMs in the DPM Protection listing. I don't want to burn through my storage space too fast with duplicate protection, so I was wondering: Is it recommended to back up VMs through the host, or is it better to install the DPM agent on each VM and backup as I would any other machine? It would seem as though most people (currently including me) do it the second way, but is there any advantage to including the entries under HyperV (Backup using Child Partition Snapshop)?

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• Can I "reprogram" an American Express USB drive?

  - by SkippyFire

  I recently received a USB drive that looks like a credit card as a promotion. The drive portion flips out to plug it in. When you plug it in, it opens the run dialog, and opens a URL to an American Express web page. I was able to find it in the Device Manager: But I don't know what else to do? Is there a way I can convert this into a plain old USB drive? Or better yet, can I modify the command that it runs when inserted into a computer?

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• How to put Powerpoint viewer full screen on secondary display?

  - by Andrew Grimm

  Using Powerpoint viewer (2010), I want to show a Powerpoint show on my secondary display, i.e. the projector, not on my laptop screen. However, Powerpoint viewer always does full screen presentations on the primary display, even if I move the Powerpoint viewer program to the secondary display. Powerpoint and multiple monitors shows how to configure which display a Powerpoint presentation is shown on for the full version of Powerpoint. But how do I do this for Powerpoint viewer? One workaround is to clone monitors rather than having separate monitors displaying different things, but I'm still wondering if there's a better way.

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