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• ZFS Basics

  - by user12614620

  Stage 1 basics: creating a pool # zpool create $NAME $REDUNDANCY $DISK1_0..N [$REDUNDANCY $DISK2_0..N]... $NAME = name of the pool you're creating. This will also be the name of the first filesystem and, by default, be placed at the mountpoint "/$NAME" $REDUNDANCY = either mirror or raidzN, and N can be 1, 2, or 3. If you leave N off, then it defaults to 1. $DISK1_0..N = the disks assigned to the pool. Example 1: zpool create tank mirror c4t1d0 c4t2d0 name of pool: tank redundancy: mirroring disks being mirrored: c4t1d0 and c4t2d0 Capacity: size of a single disk Example 2: zpool create tank raidz c4t1d0 c4t2d0 c4t3d0 c4t4d0 c4t5d0 Here the redundancy is raidz, and there are five disks, in a 4+1 (4 data, 1 parity) config. This means that the capacity is 4 times the disk size. If the command used "raidz2" instead, then the config would be 3+2. Likewise, "raidz3" would be a 2+3 config. Example 3: zpool create tank mirror c4t1d0 c4t2d0 mirror c4t3d0 c4t4d0 This is the same as the first mirror example, except there are two mirrors now. ZFS will stripe data across both mirrors, which means that writing data will go a bit faster. Note: you cannot create a mirror of two raidzs. You can create a raidz of mirrors, but to do that requires trickery.

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• CodePlex Daily Summary for Tuesday, June 10, 2014

  CodePlex Daily Summary for Tuesday, June 10, 2014Popular ReleasesBell Open Imaging package: 1.0: First release at Codeplex.Australia Income and Tax Calculator: Australia Income and Tax Calculator 1.4: 1. added 2014 financial year 2. refactored the codeCS-Script Source: Release v3.8.1: Improved ConfigConsole AdvancedShell extensions support cs-script.7z - CS-Script Suite (binaries, documentation, samples) cs-script.ExtensionPack.7z - CS-Script Extension Pack (additional binaries and samples) cs-scriptDocs.7z - CS-Script DocumentationPapercut: Papercut v3.0.0.0: Papercut has switched to semantic versioning! That means you will have to uninstall old "clickonce" versions to get the latest as it will see it as an older version. Latest Has Tons of New Features: Modern UI MVVM Architecture Watch Directories for New Messages Optional Backend Papercut Service Load on Windows Startup Attachments/Mime SectionsExperfwiz (Exchange Performance Data Collection tool): Experfwiz 1.3.8: List of updates in 1.3.8 Added support for Windows 2012 & 2012 R2 (for future use) Added support for Exchange 2013 Full is now enabled by default. To disable full mode, use 'nofull'. Exchange 2013 requires full. Added "\Processor Information()\" counters to Exchange 2010 full Blocked Exmon execution on Exchange 2013BugNET Issue Tracker: BugNET 1.6: Version 1.6 is a major upgrade to the latest frameworks and components by Microsoft. It includes a major UI overhaul using the bootstrap framework to have a modern, mobile friendly and easily customized layout. Upgrade to .NET 4.5 ASP.NET social auth Add script bundling and optimization Improvements for mobile devices Bootstrap (UI overhaul) Rewritten / friendly URL's Please read our release notes for BugNET 1.6: http://blog.bugnetproject.com/2014/06/08/bugnet-1-6-and-bugnet-pro-1...NDataTable: NDataTable Source Code: Source codeWindows System API in Visual Basic: DataTools Merged Beta 2.4: Added FileSystemWatcher and demonstration to this release..NET Memory Tools: DataTools Merged Beta 2.4: Added FileSystemWatcher and demonstration to this release.freeasyExplorer: 3. Alpha: This is the 3th alpha release. Please inform me if you find some issues or problems. Fixes: - add assembly informations - set list view to list mode and add custom icon - add settings window - update Mahapp.Metro Framework - add drag&drop functionality - change target .net versionkbvault-mysql: V0.16a: Additions for SEO friendly pages,printer friendly view option and tag cloud on landing pageSFDL.NET: SFDL.NET (2.2.9.3): Changelog: Retry Bugfix (Error Counter wurde nicht korrekt zurückgesetzt) Neue Einstellung: Retry Wartezeit ist nun Einstellbarbabelua: 1.5.7.0: V1.5.7.0 - 2014.6.6Stability improvement: use "lua scripts folder" as lua search path when debugging;SEToolbox: SEToolbox 01.033.007 Release 1: Fixed breaking changes in Space Engineers in latest update. Installation of this version will replace older version.Virto Commerce Enterprise Open Source eCommerce Platform (asp.net mvc): Virto Commerce 1.10: Virto Commerce Community Edition version 1.10. To install the SDK package, please refer to SDK getting started documentation To configure source code package, please refer to Source code getting started documentation This release includes bug fixes and improvements (including Commerce Manager localization and https support). More details about this release can be found on our blog at http://blog.virtocommerce.com.NPOI: NPOI 2.1: Assembly Version: 2.1.0 New Features a. XSSFSheet.CopySheet b. Excel2Html for XSSF c. insert picture in word 2007 d. Implement IfError function in formula engine Bug Fixes a. fix conditional formatting issue b. fix ctFont order issue c. fix vertical alignment issue in XSSF d. add IndexedColors to NPOI.SS.UserModel e. fix decimal point issue in non-English culture f. fix SetMargin issue in XSSF g.fix multiple images insert issue in XSSF h.fix rich text style missing issue in XSSF i. fix cell...51Degrees - Device Detection and Redirection: 3.1.2.3: Version 3.1 HighlightsDevice detection algorithm is over 100 times faster. Regular expressions and levenshtein distance calculations are no longer used. The device detection algorithm performance is no longer limited by the number of device combinations contained in the dataset. Two modes of operation are available: Memory – the detection data set is loaded into memory and there is no continuous connection to the source data file. Slower initialisation time but faster detection performanc...CS-Script for Notepad++ (C# intellisense and code execution): Release v1.0.27.0: CodeMap now indicates the type name for all members Implemented running scripts 'as administrator'. Just add '//css_npp asadmin' to the script and run it as usual. 'Prepare script for distribution' now aggregates script dependency assemblies. Various improvements in CodeSnipptet, Autcompletion and MethodInfo interactions with each other. Added printing line number for the entries in CodeMap (subject of configuration value) Improved debugging step indication for classless scripts ...ClosedXML - The easy way to OpenXML: ClosedXML 0.72.3: 70426e13c415 ClosedXML for .Net 4.0 now uses Open XML SDK 2.5 b9ef53a6654f Merge branch 'master' of https://git01.codeplex.com/forks/vbjay/closedxml 727714e86416 Fix range.Merge(Boolean) for .Net 3.5 eb1ed478e50e Make public range.Merge(Boolean checkIntersects) 6284cf3c3991 More performance improvements when saving.DNN Blog: 06.00.07: Highlights: Enhancement: Option to show management panel on child modules Fix: Changed SPROC and code to ensure the right people are notified of pending comments. (CP-24018) Fix: Fix to have notification actions authentication assume the right module id so these will work from the messaging center (CP-24019) Fix: Fix to issue in categories in a post that will not save when no categories and no tags selectedNew ProjectsATC FSX Console: Flight Simulator CodeCRM 2011 Duplicate Detection Sample: CRM 2011 Duplicate Detection Plug-in SampleCustomisation tool for Visual Studio projects: This tool is used to speedup the setting up of a Visual Studio projects and suppress any repetitive manual tasks.D3 Focus: A basic tool for people with trouble deciding what to do with their time in Diablo 3.EPS - PowerShell templating: EPS (Embedded PowerShell), inspired by erb, is a templating system that embeds PowerShell code into a text document such as HTML files. Export Bugs: Export Bugs is an application using the TFS API. Killer Bytes Pack: project of class visual studioMagickViewer: An application that uses the Magick.NET library to display images.Mario Card: https://drive.google.com/?authuser=0#folders/0B0VMM5klwOkwLXptMVV6b3NhRVEOZone: OZonePlexApp PowerShell Module: PoSH4PlexApp is an in-development PowerShell module for querying and managing PlexApp libraries via Plex Media Server's HTTP listener. Contributions welcomeProduct Usage Tracker: This project is about creating a tool/mechanism to capture and record the usage volume and usage patterns of any application.Project C²: A simple lightweight C-style programming language for near-hardware system development using GNU GAS as a back-end.Random Execute: Random Execute is a command wrapper that randomizes the start time of a processes execution.RuLaw.NET: .NET library for official Russian State Duma API web service for querying and searching information of laws, deputies, authorities, sessions, votings, etcTest_DB_Name_Check: Latestweb_gioman_proyecto: proyecto de lucas gioiaWPF Globalization and Multi-language Application: Multilingual User Interfaces providing support for switching UIs from one language to another. ??????-??????【??】: ????????,??????:?????,?????,??????,??????????,????????。????????!??????-??????【??】: ?????????????????????????????,??????????,????,????,?????????、??????,??????。?????-?????【??】: ???????????????????,??????????,????????、????,??????????,??????????。?????-?????【??】: ?????????????????、????,??100%????,??????,????????????,???????????!?????-?????【??】: ??????????????????????:????、????、??????????????,????????。????????!??????-??????【??】: ??????????????????????????,????,????,??????????。???????????????,??,??,??????????,????????????-??????【??】: ???????????????????,?????????????,????,?????????,?????????????,?????,?????!??????-??????【??】: ??????????????????,???????????,??????????????,??????????，??????????????！?????-?????【??】: ????【??:13406937288 ??? QQ:798761615】???????????????,???,??????????、???????????????????。??????,????、????，??????！ ?????-?????【??】: ???????????????,?????????????? ??。????????、????、????、?????????? ???????。?????-?????【??】: ????????????????,???????????????。???????????,??????:????、????、????????????-?????【??】: ???????【??:13406937288 ??? QQ:798761615】?????????????????,????,????“???、???、???”?????,?????,?????????????????。??????！?????-?????【??】: ?????????【??:13406937288 ??? QQ:798761615】,???????????,??????????,????:??,????,???????? ??????????,????????。??????！?????-?????【??】: ?????【??:13406937288 ??? QQ:798761615】????:?????,??????!???????????????,???????、?????、??????“??”????,????,????!?????-?????【??】: ???????【??:13406937288 ??? QQ:798761615】???????,??????,??????,??????、??????,??????、??，????，????????????-??????【??】: ?????????【??:13406937288 ??? QQ:798761615】????????????????????,???????????,??????,??????????????...????????。??????！?????-?????【??】: ???????【??:13406937288 ??? QQ:798761615】?????????、?????????,??????、??????????????????,???????.??????????,????????。??????-??????【??】: ?????????????????,??????????、??????,??????????、????、????、???????。??????-??????【??】: ??????????????????????,???????????????,???????,?????,?????,????? !!!?????-?????【??】: ???????【??:13406937288 ??? QQ:798761615】????????,????,?????、???、?????,???????,?????,???????????100%。??????！????-????【??】: ???????????、??????????????????,????????,?????,??????,????,????,????!?????-?????【??】: ?????????????????????,???????????????,????????????????????!?????-?????【??】: ?????????【??:13406937288 ??? QQ:798761615】???2005?,????????????????????,??????????,??????。?????,???????????????????，??????！?????-?????【??】: ???????【??:13406937288 ??? QQ:798761615】???????:??????!?????!???:????、????、????、????。??,??????????!??????.?????-?????【??】: ???????【??:13406937288 ??? QQ:798761615】??????????,????????????,????????,???,???????????,????,????。?????,??????. ?????-?????【??】: ?????????????????:??????!?????!???:????、????、????、????。??,??????????!??????.?????-?????【??】: ???????【??:13406937288 ??? QQ:798761615】 ?????????????????,????,????“???、???、???”?????,?????,?????????????????。??????！?????-?????【??】: ???????【??:13406937288 ??? QQ:798761615】?????????????,??????,???????????,????????????????,????????.??????.?????-?????【??】: ???????【??:13406937288 ??? QQ:798761615】???1992?,????????????????。??????????????????????。????????????,????，????????！?????-?????【??】: ?????【??:13406937288 ??? QQ:798761615】??????:?????,??????!???????????????,???????、?????、??????“??”????,????,????! ?????-?????【??】: ???????【??:13406937288 ??? QQ:798761615】????????,????,?????、???、?????,???????,?????,???????????100%。??????！??????-??????【??】: ????????【??:13406937288 ??? QQ:798761615】?????????、?????????,??????、??????????????????,???????.??????????,????????。?????-?????【??】: ???????【??:13406937288 ??? QQ:798761615】???1992?,????????????????。??????????????????????。????????????,????，????????！ ?????-?????【??】: ?????????【??:13406937288 ??? QQ:798761615】???2005?,????????????????????,??????????,??????。?????,???????????????????，??????！?????-?????【??】: ???????【??:13406937288 ??? QQ:798761615】??????????????????,???????????,??????,??????????????...????????。??????！?????-?????【??】: ?????????????【??:13406937288 ??? QQ:798761615】?????????????,??????,???????????,????????????????,????????.??????.??????-??????【??】: ???????????,?????,???????????,???????,????,????,????,?????。??????-??????【??】: ????????????????8?，????????,????????,??????????,?????,????? ,????????!??????-??????【??】: ????????????????6?,???????????????????????????,??????????????,?????????！?????-?????【??】: ?????????????【??:13406937288 ??? QQ:798761615】???????,??????,??????,??????、??????,??????、??，????，??????！?????-?????【??】: ???????????、???、??、??????????????????????????????,????????????????!?????-?????【??】: ????????????????????????????、????、????、???????????,????,????!?????-?????【??】: ???????【??:13406937288 ??? QQ:798761615】?????????????????,????,????“???、???、???”?????,?????,?????????????????。??????！?????-?????【??】: ???????【??:13406937288 ??? QQ:798761615】??????????,????????????,????????,???,???????????,????,????。?????,??????.

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• Oracle Value Chain Summit 2014 - Early Bird Registration Now Open

  - by Pam Petropoulos

  Get the Best Rate on the Biggest Supply Chain Event of the Year. Register Now and save $200. Join more than 1,000 of your peers at the Value Chain Summit to learn how smart companies are transforming their supply chains into information-driven value chains. This unparalleled experience will give you the tools you need to drive innovation and maximize revenue. Date: February 3-5, 2014 Location: San Jose McEnery Convention Center Click here to learn more Thought-Leading Speakers Top minds and tech experts across industries will share the secrets of their success, firsthand. Prepare to be inspired by speakers like Geoffrey Moore, business advisor to Cisco, HP, and Microsoft and best-selling author of six books, including Crossing the Chasm. Customized Experiences Choose from more than 200 sessions offering deep dives on every aspect of supply chain management: Product Value Chain, Procurement, Maintenance, Manufacturing, Value Chain Execution, and Value Chain Planning. Unrivaled Insight & Solutions Hands-on workshops, product demonstrations, and interactive breakouts will showcase new value chain solutions and best practices to help you: -  Grow profit margins -  Build products – faster and cheaper -  Expedite delivery -  Increase customer satisfaction You don't want to miss this once-a-year event. Register Now to secure the Early Bird rate of $495 - the lowest price available.

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• Is there a better way to consume an ASP.NET Web API call in an MVC controller?

  - by davidisawesome

  In a new project I am creating for my work I am creating a fairly large ASP.NET Web API. The api will be in a separate visual studio solution that also contains all of my business logic and database interactions, Model classes as well. In the test application I am creating (which is asp.net mvc4), I want to be able to hit an api url I defined from the control and cast the return JSON to a Model class. The reason behind this is that I want to take advantage of strongly typing my views to a Model. This is all still in a proof of concept stage, so I have not done any performance testing on it, but I am curious if what I am doing is a good practice, or if I am crazy for even going down this route. Here is the code on the client controller: public class HomeController : Controller { protected string dashboardUrlBase = "http://localhost/webapi/api/StudentDashboard/"; public ActionResult Index() //This view is strongly typed against User { //testing against Joe Bob string adSAMName = "jBob"; WebClient client = new WebClient(); string url = dashboardUrlBase + "GetUserRecord?userName=" + adSAMName; //'User' is a Model class that I have defined. User result = JsonConvert.DeserializeObject<User>(client.DownloadString(url)); return View(result); } . . . } If I choose to go this route another thing to note is I am loading several partial views in this page (as I will also do in subsequent pages). The partial views are loaded via an $.ajax call that hits this controller and does basically the same thing as the code above: Instantiate a new WebClient Define the Url to hit Deserialize the result and cast it to a Model Class. So it is possible (and likely) I could be performing the same actions 4-5 times for a single page. Is there a better method to do this that will: Let me keep strongly typed views. Do my work on the server rather than on the client (this is just a preference since I can write C# faster than I can write javascript).

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• Today's Links (6/24/2011)

  - by Bob Rhubart

  Fusion Applications - How we look at the near future | Domien Bolmers Bolmers recaps a Logica pow-wow around Fusion Applications. Who invented e-mail? | Nicholas Carr IT apparently does matter to Nicholas Carr as he shares links to Errol Morris's 5-part NYT series about the origins of email. David Sprott's Blog: Service Oriented Cloud (SOC) "Whilst all the really good Cloud environments are Service Oriented," says Sprott, "it’s very much the minority of consumer SaaS that is today." Fast, Faster, JRockit | René van Wijk Oracle ACE René van Wijk tells you "everything you ever wanted to know about the JRockit JVM, well quite a lot anyway." Creating an XML document based on my POJO domain model – how will JAXB help me? | Lucas Jellema "I thought that adding a few JAXB annotations to my existing POJO model would do the trick," says Jellema, "but no such luck." Announcing Oracle Environmental Accounting and Reporting | Theresa Hickman Oracle Environmental Accounting and Reporting is designed to help companies track and report greenhouse emissions. Yoga framework for REST-like partial resource access | William Vambenepe Vambenepe says: "A tweet by Stefan Tilkov brought Yoga to my attention, 'a framework for supporting REST-like URI requests with field selectors.'" InfoQ: Pragmatic Software Architecture and the Role of the Architect "Joe Wirtley introduces software architecture and the role of the architect in software development along with techniques, tips and resources to help one get started thinking as an architect."

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• Need alternative to Accessibility's "Locate Pointer" to visually highlight the mouse.

  - by fred.bear

  Update: See end of quetion: A black-on-white cross-hair/I-bar mouse-pointer is soemtimes hard foe me to spot in amongst black-on-white text. I've tried "Accessibility / Mouse Accessibility / Locate Pointer" .. which will: Show pointer position when Control is presssed It works (to a point), but it does have a notable problem, which renders it inpractical. It has the uncanny side-effect of disallowing all Control key navigation while editing a file/dir name in Nautilus (F2).. Just touching the Control key drops it out of edit mode, which means I can't keyboard paste, move-L/R word etc... So, I'm looking for an alternative. I've tried Compiz's Water Effect, but I need something which is sharper, faster, and localized to the pointer. Compiz's Show Mouse (with fire) is no suitable. I'm really lookingf for an analog of "Accessibility / Locate Pointer": * ie. I hit Control (only).. and it blips a quick visual pulse. UPDATE: I've just realized why I can't find my mouse so often! ... It's because it is isn't there !!! ... Two apps I use a lot, Gedit and Konsole (KDE Terminal; it renders unicode better), ... dissolve the mouse-pointer to invisible after the first key is typed ... and Konsole does it after a few seconds of idle-time... like a video-player option: "hide the mouse".. Well I don't use the mouse much, and I thought it was juse my eyesight (which does rely a lot on Compiz's zoom)... I discovered it when I installed a "novelty" app, called Geyes from gnome-applets ("A goofy set of eyes for the GNOME panel. They follow your mouse.") ... It could follow the mouse better than me! :)

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• Thinking skills to be a good programmer

  - by Paul

  I have been programming for last 15 years with non-CS degree. Main reason I got into programming was that I liked to learn new things and apply them to my work. And I was able to find and fix programming errors and their causes faster than others. But I never find myself a a guru or an expert, maybe due to my non-CS major. And when I saw great programmers, I observed they are very good, much better than me of course, at solving problems. One skill I found good in my mid-career is thinking of requirements and tasks in a reverse order and in abstract. In that way, I can see what is really required for me to do without detail and can quickly find parts of solution that already exist. So I wonder if there are other thinking skills to be a good programmer. I've followed Q&As below and actually read some of books recommended there. But I couldn't really pickup good methods directly applicable for my programming work. What non-programming books should a programmer read to help develop programming/thinking skills? Skills and habits to develop to be good at programming (I'm a newbie)

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• ArchBeat Link-o-Rama for October 17, 2013

  - by OTN ArchBeat

  Oracle Author Podcast: Danny Coward on "Java WebSocket Programming" In this Oracle Author Podcast Roger Brinkley talks with Java architect Danny Coward about his new book, Java WebSocket Programming, now available from Oracle Press. Webcast: Why Choose Oracle Linux for your Oracle Database 12c Deployments Sumanta Chatterjee, VP Database Engineering for Oracle discusses advantages of choosing Oracle Linux for Oracle Database, including key optimizations and features, and talks about tools to simplify and speed deployment of Oracle Database on Linux, including Oracle VM Templates, Oracle Validated Configurations, and pre-install RPM. Oracle BI Apps 11.1.1.7.1 – GoldenGate Integration - Part 1: Introduction | Michael Rainey Michael Rainey launches a series of posts that guide you through "the architecture and setup for using GoldenGate with OBIA 11.1.1.7.1." Should your team use a framework? | Sten Vesterli "Some developers have an aversion to frameworks, feeling that it will be faster to just write everything themselves," observes Oracle ACE Director Sten Vesterli. He explains why that's a very bad idea in this short post. Free Poster: Adaptive Case Management in Practice Thanks to Masons of SOA member Danilo Schmiedel for providing a hi-res copy of the Adaptive Case Management poster, now available for download from the OTN ArchBeat Blog. Oracle Internal Testing Overview: Understanding How Rigorous Oracle Testing Saves Time and Effort During Deployment Want to understand Oracle Engineering's internal product testing methodology? This white paper takes you behind the curtain. Thought for the Day "If I see an ending, I can work backward." — Arthur Miller, American playwright (October 17, 1915 – February 10, 2005) Source: brainyquote.com

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• Oracle Exalogic Customer Momentum @ OOW'12

  - by Sanjeev Sharma

  [Adapted from here]  At Oracle Open World 2012, i sat down with some of the Oracle Exalogic early adopters  to discuss the business benefits these businesses were realizing by embracing the engineered systems approach to data-center modernization and application consolidation. Below is an overview of the 4 businesses that won the Oracle Fusion Middleware Innovation Award for Oracle Exalogic this year. Company: Netshoes About: Leading online retailer of sporting goods in Latin America.Challenges: Rapid business growth resulted in frequent outages and poor response-time of online store-front Conventional ad-hoc approach to horizontal scaling resulted in high CAPEX and OPEX Poor performance and unavailability of online store-front resulted in revenue loss from purchase abandonment Solution: Consolidated ATG Commerce and Oracle WebLogic running on Oracle Exalogic.Business Impact:Reduced abandonment rates resulting in a two-digit increase in online conversion rates translating directly into revenue up-liftCompany: ClaroAbout: Leading communications services provider in Latin America.Challenges: Support business growth over the next 3  - 5 years while maximizing re-use of existing middleware and application investments with minimal effort and risk Solution: Consolidated Oracle Fusion Middleware components (Oracle WebLogic, Oracle SOA Suite, Oracle Tuxedo) and JAVA applications onto Oracle Exalogic and Oracle Exadata. Business Impact:Improved partner SLA’s 7x while improving throughput 5X and response-time 35x for  JAVA applicationsCompany: ULAbout: Leading safety testing and certification organization in the world.Challenges: Transition from being a non-profit to a profit oriented enterprise and grow from a $1B to $5B in annual revenues in the next 5 years Undertake a massive business transformation by aligning change strategy with execution Solution: Consolidated Oracle Applications (E-Business Suite, Siebel, BI, Hyperion) and Oracle Fusion Middleware (AIA, SOA Suite) on Oracle Exalogic and Oracle ExadataBusiness Impact:Reduced financial and operating risk in re-architecting IT services to support new business capabilities supporting 87,000 manufacturersCompany: Ingersoll RandAbout: Leading manufacturer of industrial, climate, residential and security solutions.Challenges: Business continuity risks due to complexity in enforcing consistent operational and financial controls; Re-active business decisions reduced ability to offer differentiation and compete Solution: Consolidated Oracle E-business Suite on Oracle Exalogic and Oracle ExadataBusiness Impact:Service differentiation with faster order provisioning and a shorter lead-to-cash cycle translating into higher customer satisfaction and quicker cash-conversionCheck out the winners of the Oracle Fusion Middleware Innovation awards in other categories here.

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• Javascript Canvas Drawing Efficiency

  - by jujumbura

  I have just recently started some experiments with game development in Javascript/HTML5, and so far it has been going pretty well. I have a simple test scene running with some basic input handling, and a hundred-ish drawImage() calls with a few transforms. This all runs great on Chrome, but unfortunately, it already chugs on Firefox. I am using a very large canvas ( 1920 x 1080 ), but it doesn't seem like I should be hitting my limit already. So on that note, I was hoping to ask a few questions: 1) What exactly is done on the CPU vs. the GPU in terms of canvas and drawImage()? I'm afraid the answer is probably "it depends on the browser", but can anybody give me some rules of thumb? I naively imagined that each drawImage call results in a textured quad on the GPU with the canvas effectively being a render target, but I'm wondering if I'm pretty far off base there... 2) I have seen posts here and there with people saying not to use the translate(), rotate(), scale() functions when drawing on the canvas. Am I adding a lot of overhead just by adding a translate() call, as opposed to passing in the x,y to drawImage()? Some people suggest using "transate3d", etc., which are CSS properties, but I'm not sure how to use them within a scene. Can they be used for animated sprites within a single canvas? 3) I have also seen a lot of posts with people mentioning that pre-building canvases and then re-using them is a lot faster than issuing all the individual draw calls again. I am guessing that my background should definitely be pre-built into a canvas, but how far should I take this? Should I maintain an individual canvas for each sprite, to cache all static image data when not animating? Thank you much for your advice!

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• Why is my fresh install of 12.04 running slow?

  - by user75129

  Hey guys I'm a new linux user, I figured it would be the best for the laptop I just purchased because it's said to be faster than Windows 7. I'm currently dual-booting with Windows 7 Professial and Ubuntu 12.04. The laptop I am using is the LG X Note P210 Specs: Intel Core i5 470UM Dual Core clocked at 1.33GHz 12.5" HD LED LCD Screen at 1366 by 768 4GB DDR3 @ 1333 MHz RAM Integrated Intel HD Graphics Card 4 Cell Battery with 3150mAh It comes loaded Windows 7 Home Premium 64-Bit, it runs fine on that but my Ubuntu 12.04 runs slower than it and I don't understand why, it definitely has decent specs to run even a 64-bit operating system and do some gaming. Granted I know it's not the best but for a laptop it does the job so Ubuntu should work especially since it's said to make older units with worse specs run even better. I'm not all that familiar with coding and all so what are things I can do to optimize speed without overclocking? Boot up is fine, its program response time I believe, once Im in the actual OS, it lags, slows down, apps stop working, take forever to load up apps.

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• Who should be the architect in an agile project?

  - by woni

  We are developing the agile way for a few months now and I have some troubles understanding the agile manifesto as interpreted by my colleagues. The project we are developing is a framework for future projects and will be reused many times in the next years. Code is only written to fulfill the needs of the current user story. The product owner tells us what to do, but not how to do it. What would be right, in my opinion, because he is not implicitly a programmer. The project advanced and in my eyes it messed up a little bit. After I recognized an assembly that was responsible for 3 concerns (IoC-Container, communication layer and project internal things), I tried to address this to my colleagues. They answered that this would be the result of applying YAGNI, because know one told them to respect that functionalities have to be split up in different assemblies for further use. In my opinion no one has to tell us that we should respect the Separation of Concerns principle. On the other side, they mentioned to prefer YAGNI over SoC because it is less effort to implement and therefore faster and cheaper. We had changing requirements a lot at the beginning of the project and ended up in endless refactoring sessions, because to much has to be adapted. Is it better to make such rather simple design decisions up front, even there is no need in the current situation, or do we have to change a lot in the later progress of the project?

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• Team Software Development using Ruby on Rails

  - by Panoy

  I used to work alone on small to medium sized programming projects before and have no experience working in a team environment. Currently, there will be 3 of us in an in-house software development team that is tasked to develop a number of software for an academic institution. We have decided to use the web for the majority of the projects and are planning to choose Ruby on Rails for this and I would like to ask for your inputs, advices and approaches with regards to software development as a team using the RoR web framework. One thing that has really confounded me is how you divide the programming tasks of a project if there are 3 of you that are really doing the coding. It’s obvious that we as developers approach a problem in a modular way and finish it one after another. If the project consists of 3 modules, should each one of us focus on each of those modules? Would it be faster that way? How about if the 3 of us would focus on one module first (that’s what I really prefer). Is using a distributed version control system such as Git the answer to this type of problem? Please don’t forget to put your tips and experiences with regards to team software development. Cheers!

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• How to deal with a CEO making all technical decision but with little technical knowledge ?

  - by anonymous

  Hi, Question posted anonymously for obvious reasons. I am working in a company with a dev group of 5-6 developers, and I am in a situation which I have a hard time dealing with. Every technical choice (language, framework, database, database scheme, configuration scheme, etc...) is decided by the CEO, often without much rationale. It is very hard to modify those choices, and his main argument consists in "I don't like this", even though we propose several alternative with detailed pros/cons. He will also decide to rewrite from scratch our core product without giving a reason why, and he never participates to dev meetings because he considers it makes things slower... I am already looking at alternative job opportunities, but I was wondering if there anything we (the developers) could do to improve the situation. Two examples which shocked me: he will ask us to implement something akin to configuration management, but he reject any existing framework because they are not written in the language he likes (even though the implementation language is irrelevant). He also expects us to be able to write those systems in a couple of days, "because it is very simple". he keeps rewriting from scratch on his own our core product because the current codebase is too bad (codebase whose design was his). We are at our third rewrite in one year, each rewrite worse than the previous one. Things I have tried so far is doing elaborate benchmarks on our product (he keeps complaining that our software is too slow, and justifies rewrites to make it faster), implement solutions with existing products as working proof instead of just making pros/cons charts, etc... But still 90 % of those efforts go to the trashbox (never with any kind of rationale behind he does not like it, again), and often get reprimanded because I don't do exactly as he wants (not realizing that what he wants is impossible).

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• Limiting the speed of the mouse cursor

  - by idlewire

  I am working on a simple game where you can drag objects around with the mouse cursor. As I drag the object around quickly, I notice there is some juddering, which seems to be due to the fact that I can move the mouse cursor faster than the game's update/draw. So, although I maintain the offset from where the player initially clicked on the object, the mouse's relative position to the object shifts around slightly before settling as I move the object very quickly. The only way I have found to get smooth, exact 1:1 movement is if I turn both IsFixedTimeStep and SynchronizeWithVerticalRetrace to false. However, I'd rather not have to do that. I have also tried making a custom mouse cursor, hiding the real mouse, taking the real mouse delta and clamping it to a maximum speed. Here is the problem: In windowed mode, the "real" mouse cursor moves off the window while the custom mouse cursor (since it's movement is being scaled) is still somewhere inside the game window. This becomes bizarre and is obviously not desired, as clicking at this point means clicking on things outside the game window. Is there any way to accomplish this in windowed mode? In fullscreen mode, the "real" mouse cursor is bounded to the edges of the screen. So I get to a point where there is no more mouse delta, yet my custom cursor is still somewhere in the middle of the screen and hence can't move further in that direction. If I wanted to clamp it to the edge of the screen when the real cursor is at the edge, then I would get an abrupt jump to the edge of the screen, which isn't desired either Any help would be appreciated. I'd like to be able to limit the speed of the mouse, but also would appreciate help with the first issue (the non-smooth relative offset between mouse cursor movement and object movement).

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• A Cost Effective Solution to Securing Retail Data

  - by MichaelM-Oracle

  By Mike Wion, Director, Security Solutions, Oracle Consulting Services As so many noticed last holiday season, data breaches, especially those at major retailers, are now a significant risk that requires advance preparation. The need to secure data at all access points is now driven by an expanding privacy and regulatory environment coupled with an increasingly dangerous world of hackers, insider threats, organized crime, and other groups intent on stealing valuable data. This newly released Oracle whitepaper entitled Cost Effective Security Compliance with Oracle Database 12c outlines a powerful story related to a defense in depth, multi-layered, security model that includes preventive, detective, and administrative controls for data security. At Oracle Consulting Services (OCS), we help to alleviate the fears of massive data breach by providing expert services to assist our clients with the planning and deployment of Oracle’s Database Security solutions. With our deep expertise in Oracle Database Security, Oracle Consulting can help clients protect data with the security solutions they need to succeed with architecture/planning, implementation, and expert services; which, in turn, provide faster adoption and return on investment with Oracle solutions. On June 10th at 10:00AM PST , Larry Ellison will present an exclusive webcast entitled “The Future of Database Begins Soon”. In this webcast, Larry will launch the highly anticipated Oracle Database In-Memory technology that will make it possible to perform true real-time, ad-hoc, analytic queries on your organization’s business data as it exists at that moment and receive the results immediately. Imagine real-time analytics available across your existing Oracle applications! Click here to download the whitepaper entitled Cost Effective Security Compliance with Oracle Database 12c.

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• Interpolation between two 3D points?

  - by meds

  I'm working with some splines which define a path a character follows (you can see a gameplay video here to get a better understanding of what's going on: http://www.youtube.com/watch?v=BndobjOiZ6g). Basically the characters 'forward' look direction is set to the 'forward' direction of the spline and when players tilt their phone left and right the character is strafed along its 'right' coordinate. The issue with this is (rather obviously) in performance, interpolating over a spline to find the nearest position and tangent relative to the player is an incredibly costly operation. To get by this I cache a finite number of positions in what I call 'SplineDetails', the class is as follows: public class SplineDetails { public SplineDetails() { Forward = Vector3.forward; Position = Vector3.one * float.MaxValue; Alpha = -1; } public float Alpha; // [0,1] measured along length of spline where 0 is the initial point and 1 is the end point of the spline public Vector3 Position; // the point of the spline at this alpha public Vector3 Forward; // the forward tangent of the spline at this alpha } I populate this with say 30 coordinates and I can give a rough estimate of a coordinate and 'forward' based on a position past in. It's not as accurate but it's much faster. But now I'd like to make the system work better by estimating positions and 'forward' directions by interpolating between two of the cached points though I'm stuck trying to figure out some logic. My first problem is, how can I determine between which two points the object is? Given each point can be placed at different intervals along the spline it could mean that two points in front or behind the object can be closer to the object. The other problem is to figure out the proportion between the two paths it's between, i.e. if there is a point a at coordinate (0,0,0) and point b at coordinate (1,0,0) if the object is at position (0.5,0,0) then the result it should give is '0.5' (as it is equal distance away from point a and point b). That's a simple example, but what if the object is at coordinate (0.5,3,0) for example?

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• Speed up ADF Mobile Deployment to Android with Keystore

  - by Shay Shmeltzer

  As you might have noticed from my latest ADF Mobile entries, I'm doing most of my ADF Mobile development on a windows machine and testing on an Android device. Unfortunately the Android/windows experience is not as fast as the iOS/Mac one. However, there is one thing I learned today that can make this a bit less painful in terms of the speed to deploy and test your application - and this is to use the "Release" mode when deploying your application instead of the "Debug" mode. To do this you'll first need to define a keystore, but as Joe from our Mobile team showed me today, this is quite easy. Here are the steps: Open a command line in your JDK bin directory (I just used the JDK that comes with the JDeveloper install). Issue the following command: keytool –genkey –v –keystore <Keystore Name>.keystore –alias <Alias Name> -keyalg RSA –keysize 2048 –validity 10000 Both keystore name and alias names are strings that you decide on. The keytool utility will then prompt you with various questions that you'll need to answer. Once this is done, the next step is to configure your JDeveloper preferences->ADF Mobile to add this keystore there under the release tab:  Then for your application specific deployment profile - switch the build mode from debug to release. The end result is a much smaller mobile application (for example from 60 to 21mb) and a much faster deployment cycle (for me it is about twice as fast as before).

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• Optimized algorithm for line-sphere intersection in GLSL

  - by fernacolo

  Well, hello then! I need to find intersection between line and sphere in GLSL. Right now my solution is based on Paul Bourke's page and was ported to GLSL this way: // The line passes through p1 and p2: vec3 p1 = (...); vec3 p2 = (...); // Sphere center is p3, radius is r: vec3 p3 = (...); float r = ...; float x1 = p1.x; float y1 = p1.y; float z1 = p1.z; float x2 = p2.x; float y2 = p2.y; float z2 = p2.z; float x3 = p3.x; float y3 = p3.y; float z3 = p3.z; float dx = x2 - x1; float dy = y2 - y1; float dz = z2 - z1; float a = dx*dx + dy*dy + dz*dz; float b = 2.0 * (dx * (x1 - x3) + dy * (y1 - y3) + dz * (z1 - z3)); float c = x3*x3 + y3*y3 + z3*z3 + x1*x1 + y1*y1 + z1*z1 - 2.0 * (x3*x1 + y3*y1 + z3*z1) - r*r; float test = b*b - 4.0*a*c; if (test >= 0.0) { // Hit (according to Treebeard, "a fine hit"). float u = (-b - sqrt(test)) / (2.0 * a); vec3 hitp = p1 + u * (p2 - p1); // Now use hitp. } It works perfectly! But it seems slow... I'm new at GLSL. You can answer this questions in two ways: Tell me there is no solution, showing some proof or strong evidence. Tell me about GLSL features (vector APIs, primitive operations) that makes the above algorithm faster, showing some example. Thanks a lot!

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• 12.10 upgrade broke brightness keys [closed]

  - by Chris Morgan

  I have been running Ubuntu (64-bit) on my HP 6710b laptop (Core 2 Duo with integrated graphics) for several years, and the backlight brightness keys have always worked. Since I upgraded to Ubuntu 12.10 earlier today, those keys do not work any more. The secondary function keys: Fn+F3: sleep; still works (and considerably faster than ever before!) Fn+F8: battery info; still works Fn+F9: reduce brightness; stopped working in 12.10 Fn+F10: increase brightness; stopped working in 12.10 It may also be worth while mentioning that X does not appear to be receiving the brightness events at all, or at least not sending them out further. (This I detected with a key logger I wrote for a Uni project, which uses X's Record extension; it is informed of the sleep and battery info keystrokes, but doesn't receive the brightness ones at all.) In the mean time, I know that I can use the Brightness & Lock settings screen to alter the brightness. (Wow! I can suddenly make my backlight darker than I could before—I can go right down to turning the backlight off, something I couldn't do before... but this model has a fairly dim screen, so I don't expect to use that much, if ever.) How can I get the brightness keys working again? This question is probably strongly related to I can't control my Brightness in HP Compaq 6710s.

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• How does one find out which application is associated with an indicator icon in Ubuntu 12.04?

  - by Amos Annoy

  It is trivial to do this in Ubuntu 10.04. The question is specific to Ubuntu 12.04. This has nothing to do (does it?) with right click. How can an indicator's icon in Ubuntu 12.04 be matched with the program responsible for it's manifestation on the top panel? A list of running applications can include all processes using System Monitor. How is the correct matching process found for an indicator? (the examination of SM points out a rather poignant factor in the faster depletion and shortened run time on battery - the ambient quiescent CPU rate in 12.04 is now well over 20% when previously it was well under 10% in 10.04, between 5% and 7%!) (I have a problem with the battery indicator - it sometimes has % and other times hh:mm - it is necessary to know the ap. & v. to get more info on controlling same. ditto: There are issues with other indicator aps.) Details from: How can I find Application Indicator ID's? suggests looking at: file:///usr/share/indicator-application/ordering-override.keyfile [Ordering Index Overrides] nm-applet=1 gnome-power-manager=2 ibus=3 gst-keyboard-xkb=4 gsd-keyboard-xkb=5 which solves the battery identification, and presumably nm is NetworkManager for the rf icon, but the envelope, blue tooth and speaker indicator aps. are still a mystery. (Also, the ordering is not correlated.) Mind you, it was simple in the past to simply right click to get the About option to find the ap. & v. info. browsing around and about: file:///usr/share/indicator-application/ordering-override.keyfile examined: file:///usr/share/indicators file:///usr/share/indicators/messages/applications/ ... perhaps?/presumably? the information sought may be buried in file:///usr/share/indicators

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• Efficiently rendering to 3D texture

  - by TravisG

  I have an existing depth texture and some other color textures, and want to process the information in them by rendering to a 3D texture (based on the depth contained in the depth texture, i.e. a point at (x/y) in the depth texture will be rendered to (x/y/texture(depth,uv)) in the 3D texture). Simply doing one manual draw call for each slice of the 3D texture (via glFramebufferTextureLayer) is terribly slow, since I don't know beforehand to what slice of the 3D texture a given texel from one of the color textures or the depth texture belongs. This means the entire process is effectively for each slice for each texel in depth texture process color textures and render to slice So I have to sample the depth texture completely per each slice, and I also have to go through the processing (at least until to discard;) for all texels in it. It would be much faster if I could rearrange the process to for each texel in depth texture figure out what slice it should end up in process color textures and render to slice Is this possible? If so, how? What I'm actually trying to do: the color textures contain lighting information (as seen from light view, it's a reflective shadow map). I want to accumulate that information in the 3D texture and then later use it to light the scene. More specifically I'm trying to implement Cryteks Light Propagation Volumes algorithm.

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• Am I an idealist?

  - by ereOn

  This is not only a question, this is also a call for help. Since I started my career as a programmer, I always tried to learn from my mistakes. I worked hard to learn best-practices and while I don't consider myself a C++ expert, I still believe I'm not a beginner either. I was recently hired into a company for C++ development. There I was told that my way to work was "against the rules" and that I would have to change my mind. Here are the topics I disagree with my hierarchy (their words): "You should not use separate header files for your different classes. One big header file is both easier to read and faster to compile." "Trying to use different headers is counter-productive : use the same super-set of headers everywhere, and enforce the use #pragma hdrstop to hasten compilation" "You may not use Boost or any other library that uses nested directories to organize its files. Our build-machine doesn't work with nested directories. Moreover, you don't need Boost to create great software." One might think I'm somehow exaggerated things, but the sad truth is that I didn't. That's their actual words. I believe that having separate files enhance maintainability and code-correctness and can fasten compilation time by the use of the proper includes. Have you been in a similar situation? What should I do? I feel like it's actually impossible for me to work that way and day after day, my frustration grows.

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• Oracle R Distribution 2-13.2 Update Available

  - by Sherry LaMonica

  Oracle has released an update to the Oracle R Distribution, an Oracle-supported distribution of open source R. Oracle R Distribution 2-13.2 now contains the ability to dynamically link the following libraries on both Windows and Linux: The Intel Math Kernel Library (MKL) on Intel chips The AMD Core Math Library (ACML) on AMD chips To take advantage of the performance enhancements provided by Intel MKL or AMD ACML in Oracle R Distribution, simply add the MKL or ACML shared library directory to the LD_LIBRARY_PATH system environment variable. This automatically enables MKL or ACML to make use of all available processors, vastly speeding up linear algebra computations and eliminating the need to recompile R.  Even on a single core, the optimized algorithms in the Intel MKL libraries are faster than using R's standard BLAS library. Open-source R is linked to NetLib's BLAS libraries, but they are not multi-threaded and only use one core. While R's internal BLAS are efficient for most computations, it's possible to recompile R to link to a different, multi-threaded BLAS library to improve performance on eligible calculations. Compiling and linking to R yourself can be involved, but for many, the significantly improved calculation speed justifies the effort. Oracle R Distribution notably simplifies the process of using external math libraries by enabling R to auto-load MKL or ACML. For R commands that don't link to BLAS code, taking advantage of database parallelism using embedded R execution in Oracle R Enterprise is the route to improved performance. For more information about rebuilding R with different BLAS libraries, see the linear algebra section in the R Installation and Administration manual. As always, the Oracle R Distribution is available as a free download to anyone. Questions and comments are welcome on the Oracle R Forum.

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• Effective handling of variables in non-object oriented programming

  - by srnka

  What is the best method to use and share variables between functions in non object-oriented program languages? Let's say that I use 10 parameters from DB, ID and 9 other values linked to it. I need to work with all 10 parameters in many functions. I can do it next ways: 1. call functions only with using ID and in every function get the other parameters from DB. Advantage: local variables are clear visible, there is only one input parameter to function Disadvantage: it's slow and there are the same rows for getting parameters in every function, which makes function longer and not so clear 2. call functions with all 10 parameters Advantage: working with local variables, clear function code Disadvantage: many input parameters, what is not nice 3. getting parameters as global variables once and using them everywhere Advantage - clearer code, shorter functions, faster processing Disadvantage - global variables - loosing control of them, possibility of unwanted overwriting (Especially when some functions should change their values) Maybe there is some another way how to implement this and make program cleaner and more effective. Can you say which way is the best for solving this issue?

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