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• Multiple copies of JBoss acting as one? [migrated]

  - by scphantm

  I have a few ideas how to solve the problem, but one question about jboss clustering. Please, keep in mind these applications were written very poorly, that is why they require so much memory and there is nothing i can do about that right now. So, I have clustered applications on Jboss where the application was small enough to run on one box. Meaning that one machine could handle the load. But, the current problem is that i have been asked to run several systems on the same environment. Our machines are virtuals and due to limited hardware, are restricted to 8 GB RAM, which gives jboss about 7GB to itself. Unfortunately, that isn't enough to run the group of applications. Im constantly getting heap errors and crashes. If i cluster 2 or 3 jboss instances together, can i run applications that consume more resources than a single box can handle?

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• What driver for nVIDIA GeForce MX440?

  - by ubufan

  I have recently installed (clean install) Ubuntu 12.10 on a desktop PC with nVIDIA GeForce MX440 (AGP 8x) and I have problems with Unity. Although I can see the desktop, however i can't see unity bar and icons. So, I decided to install lubuntu-desktop to see the performance. And yes! I choose lubuntu-desktop from Log On screen and the performance is definetely much better and has nothing to do with the aforementioned on unity. The system has native drivers from the Ubuntu installation. I didn't touch anything in xorg configuration. I also remember that I have managed to have the best performance with this graphic card on my previous Ubuntu 9.10 system, by editing some values in /etc/X11/xorg.conf file. But I can't remember that options, because I formatted the / partition! My question is: Which is the most suitable driver for this card, in order to load the unity feature and have better performance on it?

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• Why would companies allow these practices?

  - by MuduM

  Here's a situation that usually happens in some companies: Announce interesting product X. Promise a release date. Release on the promised released date, ready or not. Users discover and report defects. Send patch after patch after patch after patch after patch. My question is: Ummm, what could be the factors that would lead them to tolerate these undesirable practices? So, in the name of quality, what can be practically and realistically improved in those practicies? I can think of time constraints, user feedback, sponsors pressuring the company, lack of money.

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• Googling query from anywhere

  - by Shagun

  Some times when I am trying out stuff on my terminal, I get some blockade or some error to resolve which I have to copy the error or last message then open my browser and then Google the query. Is it possible for me that I select the message via mouse and when I right click I get a Google it option as I get when I select some text on a browser? PS : I am not asking how to do Google search via terminal or how to browse web via terminal.These were the results I got when I goggled my question. what I want is something more general. Whenever I select a piece of text I should get a "Google me" option with the right click of my mouse(or maybe with pressing of a key or something). I would prefer that the query takes place in a browser and not in a terminal.

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• What are the things to know before to start Game Development Using C++?

  - by adietan63

  I just want to ask the question above ^. I want to learn C++ language. Someday i want to develop Game Application in c++ and I think it is so difficult for me to achieve that but im willing to learn and achieve that goals for may personal satisfaction and also for my CV as well. Can you give me a guidelines on how to achieve that goals? What are the languages that i need to learn together with c++? please help me.. Thank you!

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• How do I install obsolete packages with apt-get?

  - by naman

  i need to install old vulnerable package on ubuntu to make my own version of metasploitable. its part of my project. i am trying to do it manually but its difficult to install and run the vulnerable program. so my question is : can i install these old vulnerable package with "apt-get". suppose i install a program from sourcecode then how will i start this ? as example if i manually install telnetd (configure,make,make install) then i do not find its service in "/etc/init.d" as we get it after installing it from "apt-get" please help me. thanks in advance

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• Powerpoint: remote pointing and slide track device

  - by kkp

  I think that this question may not be suitable for this forum. But I need your help. I am planning to buy a remote pointing (not only just pointing, we will be able to track the slides) device for my powerpoint presentations. I always use Ubuntu and powerpoint with libreoffice impress. I have been looking products on amazon, most of them are either for Windows or MAC. I am not sure whether they will work on Ubuntu. I think that at least some of of you have been using a device for presentations on Ubuntu. It would be great if you share one that will work seamlessly with Ubuntu. Thanks.

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• In setting up dual Boot with Windows XP and Ubuntu, which OS do I install first?

  - by markl

  I'd like to install both Ubuntu 12.04 and Windows XP on a Dell laptop, and I was thinking about using a dual boot structure, and using the bulk of my hard drive as empty hard drive space to share files between the two operating systems (so choice of file system type is very important in this set-up). The kind of partitioning structure I would like to use is Partition 1 - Ubuntu 12.04 (root) (20GB) Partition 2 - Ubuntu /home (20GB) Partition 3 : Free Space (560GB) Partition 4 : Windows XP (35GB) Partition 5 : SWAP (3GB) (Total Hardrive Capacity is ~640GB) My question is; what is the best way to go about setting up this kind this system? Should I install Windows XP first and setup the partitions, and then install Ubuntu which I believe will install the GRUB bootloader for OS booting choice or Do I install Ubuntu first, setting up the available partitions and then perform a WIndows install? Please let me know if there is anything in this setup that I have left out and should know about, including things related to setting particular partitions as logical or primary, and whether the boot partition and the filesystem partition should actually be two separate partitions.

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• Will taking a job that's web and database related limit my software development opportunities later on?

  - by someone

  I love programming, particularly OOP. My school experience was mostly in Java/OOP, and I had a job for a limited time in Java, Python, and other OOP kind of languages. However, a move necessitated a change in jobs, and what I've ended up with now is a web-development and database intensive job. I may possibly hold this job for several years. My question is, will this limit my choices later on? Will I be able to find another Java / software-development kind of job, or will I be rejected because my experience will be mostly in a different area?

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• Force Gnome 3 to work

  - by nkg5

  I have Ubuntu 12.10 on dual-boot with windows XP. My PC specifications are AMD Sempron 2800+ 1,6GHz with 512 MB ram and ATI Radeon 9250 graphic card with 128 MB memory. As Unity works slow and I don't like it's look, I installed gnome-shell. But as you know, Gnome 3 won't work on it. But gnome classic without effects works great. Thing is, when I turn off windows (by holding the power button or pressing restart button) my resolution on Linux is changed to 1024x768, and I can only change it by turning off the PC and turning off it's power source. But it is not the problem. The problem is that it runs Gnome 3 after one restart, it also runs better than Unity. My question is: Can I somehow force gnome 3 to work always and disable some of it's effects so it can run better?

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• Using a texture as an integer array (OpenGL 3.3, shader version 3.3)

  - by Cubic

  I'm trying to have something like an integer array uniform for my fragment shader (I only need read access). Since it's a fairly large chunk of data (not so large that uploading it in every frame would be impossible, but enough to make me want to rather not do it). Essentially I want to just pass it a uniform telling the shader where this "array" is. I believe I can use a 1D texture for this, but I don't know how (actually, I don't know how to do many things because I just can't seem to find a reference for GLSL 3.3, I only ever find references for the C API). This sounds like a rather basic question and I'm sure it's been answered already somewhere, but I keep searching and can't quite find what I'm looking for.

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• User input and automated input separation

  - by tpaksu

  I have a MySQL database and an automation script which modifies the data inside once a day. And these columns may have changed by an user manually. What is the best approach to make the system only update the automated data, not the manually edited ones? I mean yes, flagging the cell which is manually edited is one way to do it, but I want to know if there's another way to accomplish this? Just curiosity. BTW, the question is about cell values, not rows.

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• Testing complex compositions

  - by phlipsy

  I have a rather large collection of classes which check and mutate a given data structure. They can be composed via the composition pattern into arbitrarily complex tree-like structures. The final product contains a lot of these composed structures. My question is now: How can I test those? Albeit it is easy to test every single unit of these compositions, it is rather expensive to test the whole compositions in the following sense: Testing the correct layout of the composition-tree results in a huge number of test cases Changes in the compositions result in a very laborious review of every single test case What is the general guideline here?

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• C++ game programming

  - by UnTraDe

  Until now I have been using C# with XNA for 2d and a little bit of 3d games, althought I dont remember that I finished any of them I want to start working with C++. I have a very very little exprience with C++ and my question is where to start? I plated a little bit with SFML and I encountered some problems with performance when I started to build a tile based game. I'm pretty sure that the problem is my code and not the library itself. Is there anything similiar to XNA for C++? I should keep try and work with SFML? Sorry for my bad english! Thanks in advance!

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• Ubuntu server upgrade 11.04 to 11.10 fails

  - by DLosc

  I'm actually trying to upgrade my Ubuntu 11.04 server to 12.04, but I have to go through 11.10 first, right? Well, do-release-upgrade is failing miserably. Here are some representative screenshots: Screenshot 1 Screenshot 2 Screenshot 3 Screenshot 4 And finally... Yeah. I found this question, which appears to have similar errors, but I've tried all of the suggestions given there and nothing has changed. I tried running apt-get dist-upgrade; it churned for a while and eventually came back with "Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?" Ran apt-get update and got much the same kinds of error messages I got from do-release-upgrade. Any ideas/suggestions/solutions? Should I try downloading & upgrading from the CD instead? I'm glad to provide any further information I've forgotten.

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• Is Google indexing pages that has no connection with other pages? [duplicate]

  - by Grkmksk

  This question already has an answer here: How did Google find my unlinked newly created pages? 3 answers I am working on a web project that has nearly 100 thousand instant users and there is a webpage that we are using for test cases. There are no links pointing to it from other pages. It shouldn't be indexed by Google or any other search engines. "noindex" can be used in this situation, I know but I wonder if Google (or any others) indexes this page, if I don't do anything to prevent it.

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• Having problem to login after upgrading from 11.10 to 12.04

  - by LinuxIsMyFriend

  I just update to 12.04 from 11.10 and I get to the login screen w/o problems. When I enter my password the screen turns black and returns to the login screen half a second later. There is a related question out there which was solved by creating more space on the disk but my disks (or rather partitions) are all below 30%. I can log in as guest. I can also login at the cmd prompt (going to tty with Alt+Ctrl+F1) with my normal user credentials. When logged in as guest I can also install programs using my normal account password. There is the normal authentication error when I mistype my password so I'm also sure the password works. Any suggestions?

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• Distinguishing between sets of status reports

  - by user1769486

  I am working on an internal database monitoring system and am at a point where I sort of hit the wall in terms of application design. Basically I have an extensible plugin architecture where I shall have an OK, a warning or an error upon running a db verification. My first question whether it is sufficient to have only one status reported with an optional status message or provide the ability to have more than one returned (with attached messages) and then calculate an aggregated overall status. In particular in the latter case my second issue would be how to distinguish between two verification reports with the same status code (as it can come from different triggers). I would need to do this to see whether some change happened between the current and last verification. I could simply have string comparisons of the attached status messages mentioned above but that does not seem very reliable.

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• Running the Ubuntu Kernel and OS on custom processor

  - by xupv5

  This is hardly a theoretical question as many have done this, albeit there's very little information on the underlying processes. I'm developing a custom MIPS-based processor on which I would like to run ubuntu. I'm quite baffled as to what to do next after you've designed the instruction set and the computer architecture itself. I need to be able to run a kernel and OS but how does it all tie in? At the moment I'm researching into designing a compiler for the linux kernel to generate the appropriate assembly language. Is that a good way to go? What do I need to do after that?

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• Updating NVIDIA drivers from 295.40: What will happen to TwinView?

  - by Spice

  Right now, I have the NVIDIA proprietary drivers enabled without the Ubuntu-X repo, so the driver version is 295.40 (which is on the official Ubuntu repo) instead of the current 304.64 for my card, but I want to update to the current (using the Ubuntu-X repo). From what I heard, after 302.xx, NVIDIA started supporting RandR and removed TwinView. My question is, I have TwinView enabled for two monitors. If I update to the new version, what will happen to my TwinView settings? Will there be any extra work to do to migrate to the new driver?

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• Can I randomly generate an endless road?

  - by y26jin

  So suppose we stand on a position(x0, y0) of a map. We can only move on the horizontal plane(no jump and stuff) but we can move forward, left, or right (in a discrete math way, i.e. integer movement). As soon as we move to the next position(x1, y1), everything around us is generated randomly by a program. We could be surrounded by one of mountain, lake, and road. We can only move on the road. The road is always 2D as the map itself. My question is, are we able to play this game endlessly? "End" means that we come across a dead end and the only way out is to go backward.

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• HTML5 : trop de battage médiatique ? L'équipe du framework Kendo UI répond dans un état des lieux sur l'utilisation du langage

  État des lieux sur l'utilisation du HTML5 par l'équipe de Kendo UI "Le battage médiatique du HTML5 est-il justifié ?" Voici la question que se posent en substance l'équipe de Kendo UI, le framework JavaScript et HTML pour obtenir des interfaces utilisateurs "modernes". Pour y répondre, l'équipe a sondé plus de 4.000 développeurs. Trois questions sont particulièrement intéressantes et portent sur : la tendance d'adoption du HTML5 ; l'importance de HTML5 pour les développeurs ; l'impact des influences extérieures sur le HTML5 (exemple : le fiasco mobile de Facebook). Le résultat comple...

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• Running Visual Studio 2012 on a convertable windows 8 tablet? [closed]

  - by Tony

  I was unsure on where to post this question so I am posting here. I was wondering if any of you are using one of the new windows 8 convertible tablets to do web development on? If so what model are you using and how do you find the experience? I have a monster gaming laptop that I usually use to develop on but it is so large and is a real pain to move around with. I would like something that is extremely portable and would effectively let me develop anywhere.

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• Working environment

  - by Yottatron

  I realise that this might not be the right place to ask questions about employment and that the question my raise debate etc. The company I work for recently decided that rather than having one web developer working on sites from a branch it would be better to make that person come into head office and work in the middle of a busy call centre. Also they're expecting the developer to answer the phone if it rings and take messages. Does anyone find that strange? Is it really the right place for a programmer to work? Thanks for the advice

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• Is it necessary to memorize code?

  - by AAA

  I am a new developer, who just got hired at a big company. I don't know how but I guess they are desperate. However, I am well-versed with HTML5/CSS3 though things change and new things are released and I keep up with as much as I can. But this job required me to hand-code Javascript, know Jquery and Ajax. I have been exposed to this a bit but I am not sure if I can hand-code Javascript. My question is, is it necessary to memorize all there is about Javascript or are there a few key things that I should know how to hand-code because looking at javascript code it seems there are lots of lines code! Please point me in the right direction.

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