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• Need to set up shared storage for Guest virtual machines that are running on a Xen host

  - by Sajith

  My environment: I am doing these things at home with the purpose of learning about virtualization techniques. My machine have quad core processor that supports Intel-VT and 8GB RAM. XEN is the virtualization platform. In short, all domUs are LVM based. Mainly I have two questions; I need to have shared storage for these VMs. Something like NFS / NAS / iSCSI etc. However, I don't know which one is the best solution. Therefore, can someone tell me which suits best? Please note that, this shared storage need to be accessed by the other physical machines in the network. How to implement the selected solution for question #1? Any tutorials / guidelines / ebooks will be a great help and highly appreciated. Thank you in advance :)

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• Why does Facebook convert PHP code to C++?

  - by user72245

  I read that Facebook started out in PHP, and then to gain speed, they now compile PHP as C++ code. If that's the case why don't they: Just program in c++? Surely there must be SOME errors/bugs when hitting a magic compiler button that ports PHP to c++ code , right? If this impressive converter works so nicely, why stick to PHP at all? Why not use something like Ruby or Python? Note -- I picked these two at random, but mostly because nearly everyone says coding in those languages is a "joy". So why not develop in a super great language and then hit the magic c++ compile button?

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• How can I fix intermittent iSight camera functionality on a Macbook Pro 5,2?

  - by Mmmm

  I have a Macbook Pro 5,2 laptop dual booting OSX and Ubuntu. The built-in iSight video camera works only sporadically. By that I mean that sometimes if I boot and try to use the camera it does not work (most of the time) but other times it does. I don't have good repeatable data regarding when it does vs. when it doesn't other than to say that it always seems to work right after I upgrade to a new Linux kernel with the Update Manager and reboot, but then eventually stops working again until I upgrade the kernel again. That is hard to test repeatably, so it's hard to know for sure that that is the case. This has happened consistently with every version of Ubuntu from 10.10 through 11.10. I can get around this by booting into the OS/X partition, since all of the hardware obviously works perfectly on that side of things, but it would be great if I could remain in Ubuntu and do the same thing. Thanks in advance for any inSights.

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• What is the single most effective thing you did to improve your programming skills?

  - by Oded

  Looking back at my career and life as a programmer, there were plenty of different ways I improved my programming skills - reading code, writing code, reading books, listening to podcasts, watching screencasts and more. My question is: What is the most effective thing you have done that improved your programming skills? What would you recommend to others that want to improve? I do expect varied answers here and no single "one size fits all" answer - I would like to know what worked for different people. Edit: Wow - what great answers! Keep 'em coming people!!!

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• Importing synaptics settings

  - by Marcus

  I've got a Samsung Series 5 Chromebook which I've installed Ubuntu on. In Chrome OS the clickpad is working great but in ubuntu it hasn't got the same settings so I'm having problems with selcting text. I managed to find the setting in Chrome OS, it's 120 about lines of settings looking like this: Device 'SynPS/2 Synaptics TouchPad': Device Enabled (131): 1 Coordinate Transformation Matrix (133): 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000 Device Accel Profile (265): -1 Device Accel Constant Deceleration (266): 1.000000 Device Accel Adaptive Deceleration (267): 1.000000 Device Accel Velocity Scaling (268): 10.000000 Device Node (250): "/dev/input/event6" Now I would like to import these settings to Ubuntu. Is that possible?

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• Global Day of Coderetreat

  - by Tori Wieldt

  From the coderetreat.org website: Coderetreat is a day-long, intensive practice event, focusing on the fundamentals of software development and design. By providing developers the opportunity to take part in focused practice away from the pressures of 'getting things done', the coderetreat format has proven itself to be a highly effective means of skill improvement. This year, the Global Day of Coderetreat is happening on December 8. It sounds cool and fun, and of course, Java Champions and Java developers around the world are involved. Here's a small sampling: Chennai, India São Paulo, Brazil Skopje, Macedonia Kraków, Poland You can go to http://globalday.coderetreat.org/  to look up events near you. It's a great opportunity to practice your craft. Here's a video from an event last year to get a flavor:

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• How do you get a high paying job programming in finance?

  - by q303

  Hi, I'm interested in eventually programming for a financial company. Unfortunately, I have a degree in linguistics with a minor in CS along with 4 years experience in .NET. I picked .NET because I thought that it would be more used in the financial world. I've heard some horror stories about badly done VBA Excel programming and being way underpaid...but then I've heard great stories about highly skilled C++ programming along with high pay (including some feedback to previous questions). I just get the impression that unless you have a MS in CS from a top 10/20 school, it might not be realistic. For those of you doing programming for bankers/traders, how did you break in?

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• Which parallel pattern to use?

  - by Wim Van Houts

  I need to write a server application that fetches mails from different mail servers/mailboxes and then needs to process/analyze these mails. Traditionally, I would do this multi-threaded, launching a thread for fetching mails (or maybe one per mailbox) and then process the mails. We are moving more and more to servers where we have 8+ cores, so I would like to make use of these cores as much as possible (and not use 1 at 100% and leave the seven others untouched). So conceptually, as an example, it would be nice that I could write the application in such a way that two cores are "continuously" fetching emails and four cores are "continuously" processing/analyzing the emails (since processing and analyzing mails is more CPU intensive than fetching mails). This seems like a good concept, but after studying some parallel patterns, I'm not really sure how this is best implemented. None of the patterns really fit. I'm working in VS2012, native C++, but I guess from a design point of view this does not really matter and just some pointers on how to organize this would be great!

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• How to convince management of making our project open source?

  - by MrSoundless

  Xamarin 3 was released last week with a great new addition: Xamarin.Forms . This triggered our attention because we've been using such a system for a couple of years now. We've developed it by ourselves and used it for a bunch of projects. We've been looking for a way to make this project open source but we didn't manage to convince the management. They believe we should not make it open source because we won't win anything with it and all that will happen is that the competition will be able to build apps quicker with our library. We believe open sourcing our library will make the world a better place and that it will make our library much more stable and complete. So my question to all you people out there: How can we convince the management to open source our library?

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• Calling All Potential JCP EC Candidates...

  - by heathervc

  Calling anyone interested in running for a JCP Executive Committee seat!   Now is the time to prepare your nomination and send email to heather at jcp.org.  The official nomination period begins this week.  Exact details for nomination submission will follow on that date, which is Friday, 28 September. For now, prepare your materials and plan to attend the JCP BoF session at JavaOne as well as the Meet the Candidates call on 18 October at 9:30 AM PDT.  Aas a nominee to the Executive Committee, you are encouraged to attend the "Meet the JCP Executive Committee Candidates" session at JavaOne on 2 October at 4:30pm at Hilton San Francisco - Golden Gate 3/4/5. These are great opportunities to present your qualification statements to the eligible voters. Please notify us if you plan to attend: pmo at jcp.org.

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• Oracle Solaris 11.1 Available Now!

  - by Glynn Foster

  As you may have already noticed, Oracle Solaris 11.1 is now available from the download page. This release marks nearly a year of development with some really exciting new features, hundreds of bug fixes, and another step towards a product that enterprise customers should feel utterly confident in deploying. We've made some great strides in fixing the frustrations that our customers care about - it is now even easier to deploy, update and manage, and our feature set is more integrated than ever to give you a superior experience. Go download now! If you've got an existing Oracle Solaris 11 11/11 installation you won't need to re-install again. Simply use the packaging tools and follow this useful How to Update to Oracle Solaris 11.1 using IPS guide. We're also hosting an online event on the 7th November where we'll talk about Oracle Solaris 11.1, some of the new features included in this release, and where we're going generally with the operating system. Come join us!

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• Abstract skill/talent system implementation

  - by kiliki

  I've been making small 2D games for about 3 years now (XNA and more recently LWJGL/Slick2D). My latest idea would involve some form of "talent tree" system in a real time game. I've been wracking my brain but can't think of a structure to hold a talent. Something like "Your melee attack is an instant kill if behind the target" I'd like to come up with an abstract object rather than putting random conditionals into other methods. I've solved some relatively complex problems before but I don't even know where to begin with this one. Any help would be appreciated - Java, pseudocode or general concepts are all great.

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• how to apt-get install with only minimal components necessary for an application

  - by ib84

  apt-get is really great. However, when you want to install an application, you often are forced to install a lot of dependencies which I believe are very often optional. For example, I want to install okular and I'm ask to install 97 packages / 233MB ! That is a lot. I particularly dislike that it wants me to install nepomuk and a lot of other stuff that has nothing to do with PDF viewing per se, and which implies demons, and many of which are clearly optional but not necessary. Question: How to do minimal install with apt-get for a given package, with only the necessary componentents to get the thing run? It's ok if some features disabled at first.

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• A LEGO-Themed Take On the Movie Inception [Video]

  - by Jason Fitzpatrick

  This Inception-inspired short film combines LEGO and CGI to great effect. Courtesy of a Staffordshire University design team, the short is a result of roughly a thousand hours of design work spread between seven students to serve as their semester project in visual FX. It has everything you could want from Inception rendered in LEGO: folding landscapes, flying bricks, an a LEGO man or two even loses his head. [via Geeks Are Sexy] HTG Explains: What Is Windows RT and What Does It Mean To Me? HTG Explains: How Windows 8′s Secure Boot Feature Works & What It Means for Linux Hack Your Kindle for Easy Font Customization

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• Comments in code

  - by DavidMadden

  It is a good practice to leave comments in your code.  Knowing what the hell you were thinking or later intending can be salvation for yourself or the poor soul coming behind you.  Comments can leave clues to why you chose one approach over the other.  Perhaps staged re-engineering dictated that coding practices vary.One thing that should not be left in code as comments is old code.  There are many free tools that left you version your code.  Subversion is a great tool when used with TortoiseSVN.  Leaving commented code scattered all over will cause you to second guess yourself, all distraction to the real code, and is just bad practice.If you have a versioning solution, take time to go back through your code and clean things up.  You may find that you can remove lines and leave real comments that are far more knowledgeable than having to remember why you commented out the old code in the first place.

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• Is possible to write too many asserts?

  - by Lex Fridman

  I am a big fan of writing assert checks in C++ code as a way to catch cases during development that cannot possibly happen but do happen because of logic bugs in my program. This is a good practice in general. However, I've noticed that some functions I write (which are part of a complex class) have 5+ asserts which feels like it could potentially be a bad programming practice, in terms of readability and maintainability. I think it's still great, as each one requires me to think about pre- and post-conditions of functions and they really do help catch bugs. However, I just wanted to put this out there to ask if there is a better paradigms for catching logic errors in cases when a large number of checks is necessary.

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• eProseed (Belgium) wins the Oracle EMEA Middleware Partner of the Year Award 2010

  - by Jürgen Kress

  eProseed triple award winner of Oracle EMEA! Geoff you missed one… Thanks for the excellent work in the SOA and BPM space and your efforts in the Specialization program. Great to see the benefits of Specialization which helps eProseed to get visibility by Oracle and to become preferred by customers! For more information on the SOA Partner Community please feel free to register at www.oracle.com/goto/emea/soa (OPN account required) Blog Twitter LinkedIn Mix Forum Wiki Website Technorati Tags: eProseed,Oracle,Specialization,SOA Partner Community,SOA Community,Geoffroy de Lamalle,Jürgen Kress,OPN

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• Attempting to GREP details of a Java error

  - by BOMEz

  I'm running Ubuntu 11 and I'm having some issues with grep. I have a shell script (see below) which essentially checks if a certain Java program of mine is running, if not it runs it. That part works out great! If my Java application throws any kind of exception however I would like to capture that information and email it to myself. How can I go about checking to see if the call to java -jar /bin/MyApp.jar fails? I tried piping it to grep, but that doesn't seem to work. Below is the full script that I've written: #Check if MyApp.jar is running, if not run it. if [ $(ps aux | grep 'java' | grep -v grep | wc -l | tr -s "\n") -eq 0 ] then echo "PacketCapture Starting...\n" java -jar /bin/MyApp.jar echo "PacketCapture Started.\n" else echo "PacketCapture already running.\n" fi

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• Oracle Technology Network July 2012 Special Offers

  - by programmarketingOTN

  Oracle Technology Network July 2012 New offers are here!  Manning is offering 41% off The Well Grounded Java Developer and Oracle Press has added a discount on the eBook for Effective MySQL: Backup and Recovery.  To learn more and get the discount codes/links please go to the OTN Member Discount page.Lets not forget the other GREAT offers still going on as well - Packt Publishing Offers -  25% off - Oracle SOA Infrastructure Implementation Certification Handbook (1Z0-451 Oracle BPM Suite 11g Developer's cookbook Pearson Offers - 35% off Java Applications ArchitectureApress Offers - 40% off Beginning Database Design ENDS July 6th!Murach Offers - 30% off Oracle SQL and PL/SQL Safari Books Online - 10-day free trial + 20% off unlimited access to Safari Books Online for 6 monthsOracle Store Discounts - Save 10% on Your Next Purchase from the Oracle Store!

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• If you want to learn all about Exalogic in 6 minutes, watch this demo!

  - by Michael Palmeter (Exalogic PM)

  If you haven't seen the latest Exalogic demo, click here now. Our excellent marketing organization has recently produced a new 6-minute flash demo that describes the Exalogic Infrastructure-as-a-Service management UI.  After years of investment in this product we are now in the final stages of delivering on the complete private-cloud-in-a-box vision that Larry Ellison announced back at Oracle OpenWorld 2010.  This demo video (flash) does the best job yet of explaining what is so great about Exalogic and why it is going to drive transformation of our industry.  If you haven't seen it yet, take a look.  There's much more to Exalogic now than just blazing performance.

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• Nokia at JavaOne

  - by Tori Wieldt

  Nokia has long been a key partner for Java Mobile, and they continue investing significantly in Java technologies. Developers can learn more about Nokia's popular Asha phone and developer platform at JavaOne. In addition to interesting technical material, all Nokia sessions will include giveaways (hint: be engaged and ask questions!). Don't miss these great sessions: CON4925 The Right Platform with the Right Technology for Huge Markets with Many Opportunities CON11253 In-App Purchasing for Java ME Apps BOF4747 Look Again: Java ME's New Horizons of User Experience, Service Model, and Internet Innovation BOF12804 Reach the Next Billion with Engaging Apps: Nokia Asha Full Touch for Java ME Developers CON6664 on Mobile Java, Asha, Full Touch, Maps APIs, LWUIT, new UI, new APIs and more CON6494 Extreme Mobile Java Performance Tuning, User Experience, and Architecture BOF6556 Mobile Java App Innovation in Nigeria

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• Looking for an old classic book about Unix command-line tools

  - by Little Bobby Tables

  I am looking for a book about the Unix command-line toolkit (sh, grep, sed, awk, cut, etc.) that I read some time ago. It was an excellent book, but I totally forgot its name. The great thing about this specific book was the running example. It showed how to implement a university bookkeeping system using only text-processing tools. You would find a student by name with grep, update grades with sed, calculate average grades with awk, attach grades to IDs with cut, and so on. If my memory serve, this book had a black cover, and was published circa 1980. Does anyone remember this book? I would appreciate any help in finding it.

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• BUILD 2013 &ndash; Summary

  - by Tim Murphy

  Originally posted on: http://geekswithblogs.net/tmurphy/archive/2013/06/28/build-2013-ndash-summary.aspx BUILD was a wonderful experience.  It was great to see old friends, make new friends, learn about the latest Microsoft technology and party with a bunch of geeks.  It didn't hurt getting some awesome swag. While I Know that some people were disappointed that Microsoft didn't Say more about the XBox One, I was pleased with the information we got for developing Windows 8.1 and Windows Phone applications. Add to that the ability to pick the brains of MVPs and product team members was really worth the price of admission. It is going to take a while to digest all of the material and weeks to go through all the videos. In the end there is a lot of information that is going to improve my projects.  I look forward to what Microsoft has coming next seeing every one at the next BUILD. Technorati Tags: BUILD 2013,window's 8.1,Windows Phone,XBox One

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• O'Reilly 50& off offer on CSS3 books to 05:00 PT on Oct/28

  - by TATWORTH

  Originally posted on: http://geekswithblogs.net/TATWORTH/archive/2013/10/21/oreilly-50-off-offer-on-css3-books-to-0500-pt.aspxAt  http://shop.oreilly.com/category/deals/css3.do?code=WKCSS&imm_mid=0b155e&cmp=em-prog-books-videos-lp-owo_css3_direct_wkcss, O'Reilly are offering 50% off a number of e-books on mastering CSS3 to 05:00 PT on Oct 28 "CSS3—the technology behind most of the eye-catching visuals on the Web today—is loaded with capabilities that once would have required JavaScript or third-party plugins, such as animation, pseudo-classes, and media queries. Use CSS3 to transform markup into stunning, richly detailed web pages that look great in any browser. For one week only, SAVE 50% on CSS3 ebooks from shop.oreilly.com and take your sites from ordinary to incredible."

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• Learning PostgreSql: Embracing Change With Copying Types and VARCHAR(NO_SIZE_NEEDED)

  - by Alexander Kuznetsov

  PostgreSql 9.3 allows us to declare parameter types to match column types, aka Copying Types. Also it allows us to omit the length of VARCHAR fields, without any performance penalty. These two features make PostgreSql a great back end for agile development, because they make PL/PgSql more resilient to changes. Both features are not in SQL Server 2008 R2. I am not sure about later releases of SQL Server. Let us discuss them in more detail and see why they are so useful. Using Copying Types Suppose...(read more)

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