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• What is the recommended glusterFS configuration for a growing website?

  - by montana

  Hello, I have a website that is tracking towards 50 million hits per day average, and within the next 3 months should be over 100 million hits per day. We are trying to use GlusterFS v 3.0.0 (with latest patches as of 1-17-2010) Currently, we've just upgraded to a load balancer environment that has 3 physical hosts with 6 Xen-Server 5.5u1 VM's (2 on each host) to serve webpage traffic. Each machine has 6 Raid-6 local storage drives (7200RPM-SATA). The old machine we came from had 1 mirrored SAS 10k drive. We also set up glusterFS currently with 3 bricks, one on each host, and it is serving the 6 VM's as clients. In testing, everything seemed fine. However when we went to production, it seemed that there just wasn't enough I/O's available to serve traffic even upwards of 15mil hits. Weeks prior, our old server was able to handle traffic, maxed out, at 20mil. Is there any recommended configurations for such an application, or things to be aware of that isn't apparent with their documentation at gluster.org for a site our size?

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• How do I cross-compile my application for Ubuntu 12.04 armhf architecture on a Ubuntu 12.04 i386 host?

  - by Jonathan Cave

  I have a large application I have written. I can successfully compile the application in the following scenarios: in a native compilation for the i386 host running Ubuntu 12.04 natively on a PandaBoard running Ubuntu 12.04 (this takes a long time) using Qemu and a chroot on the host PC for the armhf PandaBoard target (this takes a very long time) I would like to cross-compile the application on the i386 host to run on a target such as the PandaBoard to complete builds in a timely fashion. So far attempts made using the arm-linux-gnueabihf tool chain in the repositories has produced binaries that do not run correctly. At this stage, I have no plans to package the software. What is the recommended way to achieve a successful cross-compile?

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• UPS power requirements for server

  - by captainentropy

  Greetings! So, I just placed an order for a new server. The company recommended that I get a 3000W UPS. (!) As best as I could I calculated the following wattage consumption based on benchmarked data or datasheets provided by the manufacturers of each component: number watts **total watts** MoBo 1 240 240 CPUs (E5540) 2 80 160 RAID cards (3ware) 2 18 36 RAM (6x4GB) 6 3 18 DVD drive 1 7 7 floppy 1 2 2 RE4 drives 8 7 56 WD20 drives 8 6 48 Intel X25 SSD 2 0.15 0.3 total = 567 So that is for the PSU requirements only. The PSUs in the machine are a 720W for the master node and 800W each for two subsystems. That's a total of 2320W that can be delivered by these PSUs. But that is 4X the amount being consumed, at most, by the components. I didn't count case fans or the eSATA card (3W maybe?) or what the PSUs themselves require but assuming I double or triple my calculations I'm not even remotely close to the 3000W UPS I was suggested to get. They run at least $1100. I could get a 2000W for about $750 or a 1500W for $450 and still be well over my estimated power need. I don't think I need a whole lot of run time in the case of a power outage, maybe 20 minutes max, enough time to shutdown if the power doesn't come on within 5-10 minutes. Any thoughts? Am I off on my calculations? Did I overlook something major? If so what are your suggestions for a UPS? Thanks!

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• unable to enter bios

  - by fraz

  I have an asus desktop ( amd phenom X6 processor) which was preinstalled with windows 7. I wanted to install ubuntu on it (dual boot) but am unable to do so because of the boot order. So I thought of changing boot order thru bios. But it turns out, if I press any key while the computer is starting, it just doesnt boots. I can see that the keyboard and mouse are booted up. (the lights are on) but the monitor is in standby mode.. I tried tab, f2,f10, delete key. But nothing is working.. Is there a software or other alternate on how can I change boot order ? Thanks

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• Being a good mentee - a protégé.

  - by marked

  The complement of the Being a good mentor question. I work with many very senior people that have vast amounts of knowledge and wisdom in Software, Engineering and our business domain. What are some tips for gaining as much knowledge from them? I don't want to take up too much of their time, but also want to take full advantage of this since it really could help develop my skills. What are some good questions to get the conversation rolling in a sit down mentor/mentee session? Some of the people providing mentorship have little experience in this area, so it would help to be able to lead some of these discussions.

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• Can an object oriented program be seen as a Finite State Machine?

  - by Peretz

  This might be a philosophical/fundamental question, but I just want to clarify it. In my understanding a Finite State Machine is a way of modeling a system in which the system's output will not only depend on the current inputs, but also the current state of the system. Additionally, as the name suggests it, a finite state machine can be segmented in a finite N number of states with its respective state and behavior. If this is correct, shouldn't every single object with data and function members be a state in our object oriented model, making any object oriented design a finite state machine? If that is not the interpretation of a FSM in object design, what exactly people mean when they implement a FSM in software? am I missing something? Thanks

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• Is it OK to have a team with same abilities but different skill levels?

  - by A. Karimi

  I believe that in an ideal team, members should have different but complementary abilities. But is that true about software development teams? As an example we are a small team of 5. We almost have the same abilities and interests but with different levels of skills. Regarding such situation I think we don't cover our teammates' weaknesses. Is there any pattern to follow to manage and improve such team? Should I setup a team with different abilities and interests to maximize the performance and productivity? -- EDIT -- Our current team has a specific lifetime. We work together in a per-project manner. In another word we may change the team arrangement for each project depending on the project and developers situation. Actually we've provided a sort of floating situation. In short, we are a network of developers rather than a fixed-size development team.

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• Can't create new Volume on Unallocated Space

  - by natediggs

  I installed Windows Server 2008 R2 on a Dell server that has one volume that is a 6 TB RAID 5 array. I created a 120GB install volume and I'm now trying to create a 5 TB data volume. For what ever reason Windows will not allow me to create a new volume out of all of the unalocated space. Windows will allow me to create a new volume out of one 2TB block of unallocated space but not the remaining 3.5 TB block. Tried to post a screen shot but I was blocked. If I right click on the 1949.85 GB block of space there is the option to create a new volume. If I click on the 3539.5 GB block of space that option is grayed out. If I go into diskpart and try to create a new partition, diskpart says that there is only 1949GBs free on the volume. I know this process works because I did the exact same thing on another server that we have that is the exact same hardware configuration on which I used the exact same Server 2008 R2 install image. Any help would be greatly appreciated. Nate

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• Ubuntu 13.10. Can't access Internet and unable to install anything

  - by Crandacular

  After upgrading to Ubuntu 13.10 I was not able to access the Internet on any program that required it. So I uninstalled Firefox but I could reinstall from the software center so I used the terminal, everything ran smoothly, I told me how much additional space would be used, then it said "Err http://us.archive.ubuntu.com /ubuntu/ saucy/main Firefox i386 24.0+build1-0ubuntu1 Could not resolve 'us.archive.ubuntu.com Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/main/f/firefox/firefox_24.0+build1-0ubuntu1_i386.deb Could not resolve 'us.archive.ubuntu.com' E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?" And with both given possible fixes I also get errors. Please help, it's been like this sense the day the 13.10 update was released

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• Total Cloud Control for Systems - Webcast on April 12, 2012 (18:00 CET/5pm UK)

  - by Javier Puerta

  Total Cloud Control Keeps Getting BetterJoin Oracle Vice President of Systems Management Steve Wilson and a panel of Oracle executives to find out how your enterprise cloud can achieve 10x improved performance and 12x operational agility. Only Oracle Enterprise Manager Ops Center 12c allows you to: Accelerate mission-critical cloud deployment Unleash the power of Solaris 11, the first cloud OS Simplify Oracle engineered systems management You’ll also get a chance to have your questions answered by Oracle product experts and dive deeper into the technology by viewing our demos that trace the steps companies like yours take as they transition to a private cloud environment. Register today for this interactive keynote and panel discussion. Agenda 18:00 a.m. CET (5pm UK) Keynote: Total Cloud Control for Systems 18:45 a.m. CET (5:45 pm UK) Panel Discussion with Oracle Hardware, Software, and Support Executives 19:15 a.m. CET (6:15 UK) Demo Series: A Step-by-Step Journey to Enterprise Clouds

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• How to cleanup a Local Repository?

  - by maythux

  In my local repository each time i update the packages inside. The problem is: I have many versions of the same package. so, i need to delete the old versions in some way.(don't tell me to do it manually!!) Any ideas?!! Maybe a script that checks the version of each package keeping the newer version and deletind older ones can solve this issue. I am seeking for such script or if some software is founded would be great UPDATE: See this for how to make a local repository

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• Best practices of texture size

  - by psal

  I wanted to know how should I determine a good texture size ? Currently, I always create UV texture that are 1024x1024px but if I create for example, a big house with a 1024px texture size, it will looks pretty bad. So, should I create different texture size (512, 1024, ...) for different mesh size like this ? : or is it better to always do high-resolution texture and then reduce it in the software (ie : increase the LODBias settings in UDK reduce the size of the texture) ? Thanks for your answer. ps : sorry for my english !

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• ISACA Information Security & Risk Management Conference, Nov 14-16

  - by Troy Kitch

  Please join Oracle, as a platinum sponsor, at this year's ISACA Information Security and Risk Management Conference in Las Vegas, Nov 14-16. This year’s conference offers up to 32 CPE hours and is designed to meet the needs of information security, governance, compliance, and risk management professionals. The event builds on and includes the key elements of information security, governance, compliance and risk management practices, and offers a fresh perspective on current and future trends. As provider of the world’s most complete, open, and integrated business software and hardware systems, Oracle can uniquely safeguard your information throughout its entire lifecycle and is the recognized leader in Data Security, Identity Management, and Governance, Risk, and Compliance solutions. Also, attend the Oracle Megatrends Session, Gone in 60 Seconds: Mitigating Database Security Risk and stop by our booth, # 100 & #102, to meet with Oracle Security Solution experts, see live product demos, and more. Learn more and register.

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• Errors when attempting to install vim on Ubuntu 12.04

  - by Anup

  I have installed Ubuntu 12.04 in my computer few days back. from then i tried to install few programs through Ubuntu software center but it showed that no internet connection even though i was connected to internet. Then i came to know that vi editor will be required to set the system configuration in which i will be able to save my password and proxy. apart from that i also tried to install the programs through terminal but still same problem occurred as it says this is not a candidate for install. i tried to install Vim using command sudo apt-get instal Vim-nox but it shows that broken package and showed many failures. please help me out of this.... thank you

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• Force Your Mac to Sort Folders on Top of Files (Windows Style)

  - by Eric Z Goodnight

  Even die-hard Mac converts have their issues with Mac OS, and one of those problems is that OS X lists folders mixed in with all other files. Here’s how to fix that in under five minutes with a clever hack. You know you’ve had that issue. You’ve dug through your files looking for that one elusive folder, and because it’s jumbled in with all the other stuff, it’s more or less impossible to find. Have no fear, with no downloads or silly plug-in software, you can finally make Mac OS behave like Windows and Linux and list those folders in the proper order.  How To Encrypt Your Cloud-Based Drive with BoxcryptorHTG Explains: Photography with Film-Based CamerasHow to Clean Your Dirty Smartphone (Without Breaking Something)

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• System for registering bugs, enhancements and invoice them?

  - by Roland Bengtsson

  I am searching suggestions for improvements? Currently our team use Github Issues to register changes in our software. Sometimes our customers have requirements that we will invoice them for. So now we reqister the same issue again in CRM. Unfortunately, the workflow is not as smooth as Github Issues and most developers try to avoid CRM if possible. It also feels waste of time to register the same issue twice. Are there any suggestions for better workflow than this?

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• HTG Explains: How System Restore Works in Windows

  - by Chris Hoffman

  System Restore is a Windows feature that can help fix some crashes and other computer problems. To know when to use it, you’ll have to understand just how System Restore works. System Restore can’t solve every problem – for example, you can’t use it to restore your personal files if they’re accidentally deleted or modified. However, it’s another tool you can use when your computer isn’t working properly. HTG Explains: How Antivirus Software Works HTG Explains: Why Deleted Files Can Be Recovered and How You Can Prevent It HTG Explains: What Are the Sys Rq, Scroll Lock, and Pause/Break Keys on My Keyboard?

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• what exactly is system programming?

  - by kentjh

  I have never understood what system programming meant. The usual definition given is "...doing something close to the Os or extending Os features...". Does using Windows API directly rather than some libraries to say do file i/o make it system programming? Was writing Android OS system programming? If I write something that would expose linux kernel through a console like app on Android am I doing system programming? If I am writing software to control a washing machine am I writing system programming? I am a beginner in programming and this is confusing me to no end. Please explain contrasting it with "application programming".

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• How to install hardware drivers for my laptop

  - by John Flisk

  Everytime I change the OS I usually format my laptop. It is an HP tx-2 Touchsmart. It has a touchscreen and additional hardware that isn't working (i.e. volume control buttons and the network discovery) If I was on windows I would just download the hardware drivers from the HP website. How do I go about installing the software for the built-in hardware of my laptop? I am new to the community and I really want to get this computer working like it used to, to get the full Ubuntu experience. Please direct me, thank you.

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• How much time takes to a new language like D to become popular? [closed]

  - by Adrián Pérez

  I was reading about new languages for me to learn and I find very good comments about D, like it's the new C or what C++ should have been. Knowing that many people say wonders about the language, I'm wondering how much time usually takes to a language to become popular. This is, having libraries ported or written natively for this language and being used in serious software development. I have read about the history of Java, and Python to figure it out, but may be they are too high level complexity to say their development could take the same time as will take for D.

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• Uninstall Calibri font, installed from Windows' font directory

  - by donkeydown

  I use e PC with both Ubuntu and Windows-7 OSs. I tried to install the Calibri font for Ubuntu in this way: I did open the calibri.ttf file in the Windows/Fonts directory using Font Viewer and clicked on the Install button. Now I need to disintall that font but I can't. Font Viewer shows me "Calibri Regular" font is installed but does not allow me to disintall it. Font Manager does not show Calibri in the font list. Character Map does not show Calibri in the font list. Ubuntu Software Center and Synaptic don't find anything like "calibri". There is no calibri file in those directories: usr/share/fonts usr/local/share/fonts ~/.fonts The font is visible to LibreOffice, Chrome, Firefox.

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• How To Install and Use ADB, the Android Debug Bridge Utility

  - by Chris Hoffman

  ADB, Android Debug Bridge, is a command-line utility included with Google’s Android SDK. ADB can control your device over USB from a computer, copy files back and forth, install and uninstall apps, run shell commands, and more. We’ve covered some other tricks that require ADB in the past, including backing up and restoring your smartphone or tablet and installing Android apps to your SD card by default. ADB is used for a variety of geeky Android tricks. Image Credit: LAI Ryanne on Flickr HTG Explains: How Antivirus Software Works HTG Explains: Why Deleted Files Can Be Recovered and How You Can Prevent It HTG Explains: What Are the Sys Rq, Scroll Lock, and Pause/Break Keys on My Keyboard?

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• Should your client be able to view your project management board?

  - by bizso09

  We're making a bespoke software for our client and use Codebase for our project management. Is it a good idea to let our client view our project management board? The advantages that we thought of are that this would enhance the cooperation between the client and the dev team, following agile practices. He would essentially become part of our team. It would also reduce communication overhead and make sure we're on the same page. The client could track the progression of the system and make suggestions along the way on the user stories. In addition, he could submit bugs or feature requests. The disadvantages that we though of are that some aspects of the board might be too technical to the client. He would suggest changes to the user stories too often and he might view some content that we normally wouldn't want our client to see. For example, when we compromise on technology or functionality, the client might question that and insist on doing things one way or the other.

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• Unity Desktop not loading and ccsm method not working

  - by slimy-spork

  I installed Ubuntu 13.04 x86_64 on my HP Pavillion DV7-6c60us. It installs fine and works until I update. I run the software updater and reboot as it requests after. When my computer comes back on I get the desktop background but the rest of the Unity desktop doesn't load. I've tried the ccsm method and re-enabling but it just de-enables itself. I've also tried installing the gnome desktop but that does nothing for me either. I really want to switch to Ubuntu but this is causing issues. P.S. I've also tried using 12.10 and 12.04 with no dice.

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• eDelivery (Delivery Cloud) Housekeeping - removal of obsolete EPM products

  - by THE

  You may have noticed that Weblogic Server (WLS) 9.2.X and WLS 10.0.X releases have been removed from the Oracle Software Delivery Cloud. The Delivery Team has been asked to remove or update any product pack or product that embeds WLS 10.3.2 or earlier versions. This is consistent with general Oracle practice of removing old product versions from public distribution systems, and encourages customer usage and adoption of newer product releases such as WLS 10.3.3 or newer.  For the convenience of existing supported customers, a media request SR on My Oracle Support can be entered to obtain any removed media.  Information on how to open such an SR can be found on  MOS Doc ID 1071023.1 . OTN will also be reviewed and similar modifications may potentially be done.  The following media packs will be removed from E-Delivery this week, as of the above reason. Hyperion 9.3.1 Hyperion 9.2.1 Hyperion Pre-system 9 EPM 11.1.1.3 EPM 11.1.1.4

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