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• Mysql ndb cluster - node restart.

  - by Arafat

  Hi guys! I just setup a mysql cluster on a fairly decent baby (IBM x3650 M3) with 24GB memory, xeon 6core, SAS 6Gbps HDD. Running Debian Lenny 5. 64bits. Ndb version is 7.1.9a. Our database size on MyISAM is around 3.2 GB. Ndb_size estimation is 58GB for ndbengine. A little info about my database is as follows. 150 common tables for global purpose. 130 tables for each clients. So it goes like this, 130 x 115(clients) = 14950 tables. Is it normal or usual to have 14000 tables on one database? The reasons why we did this was, Easy maintenance and per client based customization. Now, the problem is, ndb cluster can only support, 20320 tables. But it can support 5,000,000,000 rows in one table if I'm not wrong. My real head ache is my cluster data node takes less than two minutes to startup with out any data. But as soon as convert my tables into ndb, that too only 2000 tables, data node takes at least 30 to 40 mins to start up. Is it normal? If I convertt all my tables into ndb, will it take even longer? Or let's say if consolidate my 14000 table's data into one, which is 130 tables, will it help? Or is there anything idiotically wrong which I'm doing? I'll attach my config.ini file soon. here's the simple overview of my config Datamemory = 14G Indexmemory = 3GB Maxnooftable = 14000 Maxnoofattributes = 78000 I'm just testing these values with 2000 tables first. Please advise, how to increase the start up speed. Please point out where I'm going wrong. Thanks in advance guys!

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• Make cloudera-vm work on Oracle VM VirtualBox

  - by ????? ????????

  I downloaded this and the instructions say: Important: You must enable the I/O APIC in order to use 64-bit mode. (See http://www.virtualbox.org/manual/ch03.html.) On newer versions of VirtualBox, it may default to using SATA as the disk interface. This can cause a kernel panic in the VM. Switching to the IDE driver solves this problem. I am running this on Red Hat 64-bit mode (I've also tried on Ubuntu 64-bit with the same result). I pointed to the cloudera-vm image as a startup disk for the VM. I am getting this message: Failed to open a session for the virtual machine ClouderaDevelopment. VT-x features locked or unavailable in MSR. (VERR_VMX_MSR_LOCKED_OR_DISABLED). Result Code: E_FAIL (0x80004005) Component: Console Interface: IConsole {1968b7d3-e3bf-4ceb-99e0-cb7c913317bb} Does anyone know what I am doing wrong?

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• Corrupted .WAR file after transfer from 32-64 bit Windows Server to Desktop or vice versa

  - by Albert Widjaja

  Hi All, Does anyone experience this problem of corrupted .WAR file after it has been copied over the network share ? this is .WAR file (Web Archive) the J2EE application file (.WAR file is compressed with the same zip algorithm i think ?) Scenario 1: Windows Server 2008 x64 transfer into Windows XP using RDP client (Local Devices and Resources) Scenario 2: Windows XP 32 bit transfer into Windows Server 2003 x64 using shared network drive (port 445 SMB ?) for both of the scenario it always failed / corrupted (the source code seems to be duplicated at the end of line when you open up in the Eclipse / Java IDE). but when in both scenario i compressed the file into .ZIP file everything is OK. can anyone explains why this problem happens ? Thanks, Albert

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• Graphics Startup Screen

  - by Wesley

  Specs: AMD Athlon XP 2400+ @ 1987 MHz / 2x 512MB PC3200 DDR RAM / 160GB IDE HDD / 128MB GeForce 6200 AGP / FIC AM37 / Windows XP Pro SP3 So, every time I start up my machine, there's a startup screen for the graphics card. It should display "NVIDIA GeForce 6200 VGA BIOS" with some other copyright information underneath it. However, it randomly changed to say "NV44A VGA BIOS." I think the GeForce 6200 codename is NV44A or something, but is there someway to change it back to say "GeForce 6200 VGA BIOS" or, if not, to completely stop it from showing upon startup? (Graphics drivers are all up to date.) Thanks in advance.

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• External hard drive doesn't appear in Computer

  - by Thomas Clayson

  I cannot work out why this is happening. I have an external hard drive (which is an old laptop hard drive with an IDE to USB adapter). Plugging it into my computer powers it up. It spins correctly and the lights on the adapter flash normally. Uninstalling from hardware manager and plugging it back in causes Windows to "install new software", and it says it has installed properly. In Disk Management it comes up in the bottom part as Disk 2 with the right size (~60 GB), but not in the top half. There are three empty drives in the top half. They don't have titles or drive letters. Right clicking them bring up slightly varying context menus, but all with the options disabled. Here is a picture of my Disk Management screen: How do I make this drive show up in My Computer? I need to format it and use it as an external hard drive.

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• Need data on disk drive management by OS: getting base I/O unit size, "sync" option, Direct Memory A

  - by Richard T

  Hello All, I want to ensure I have done all I can to configure a system's disks for serious database use. The three areas I know of (any others?) to be concerned about are: I/O size: the database engine and disk's native size should either match, or the database's native I/O size should be a multiple of the disk's native I/O size. Disks that are capable of Direct Memory Access (eg. IDE) should be configured for it. When a disk says it has written data persistently, it must be so! No keeping it in cache and lying about it. I have been looking for information on how to ensure these are so for CENTOS and Ubuntu, but can't seem to find anything at all! I want to be able to check these things and change them if needed. Any and all input appreciated.

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• Dual Core or Quad Core CPU for NetBeans/Eclipse development?

  - by cdb

  I am going to buy a new desktop CPU. I am a programmer who mainly uses NetBeans IDE for Java web application development, with GlassFish application server. I went through the discussion regarding Dual Core or Quad Core. My doubt is that software like IDEs (NetBeans, Eclipse, etc., with a server running) may not be written with multiple cores in mind? I am not a game addict... So what is best for me, and which company should I choose, AMD/Intel?

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• Integrate Python Projects Into Xcode

  - by Vynile

  Hi! I'm a Mac user, and one of my hobbies is programming. I use Xcode, the integrated IDE of Mac OS X. I started to learn Python programming langage, and I want to use Xcode for developing my scripts. I searched for weeks in the internet, but I didn't find something interesting. Firstly, I want to update the integrated interpreter of Mac OS X, that is on 2.6 version. And secondly, I want to create a Python project on Xcode easily, like I do with C & C++ projects. Can you help me? I really need help! Cordially.

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• Windows 7 installation asks for DVD drivers

  - by koen

  I have installed Windows XP on my machine (Company CQ5020NL). Before I was able to do that, I set the SATA controller to IDE in the bios. Now I want to install Windows 7 upgrade. The DVD boots into the installation setup, but when I click "Install now" and am asked to load "A required CD/DVD drive device". When I click "Browse" I can browse the installation dvd and the drive I want to install to. I have tried all the SATA options in the bios already. I have no idea what to do... can anybody help me out?

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• insert system disk error after switchting SATA cables

  - by Matthias

  I have 5 hard disks built in my computer, two connected by IDE cables, three by SATA. Today I had to return two of the SATA cables to my room mate. So I grabbed another one I had floating around and connected the remaining disk by unplugging my DVD R/W. Now I receive the 'insert system disk and press enter' error after booting. Disks and cables seem to be fine, since all the disks are recognized in the BIOS. Also, I can mount the disks using a live CD w/o problems. I also tried different orderings of the cables (i.e. plugging the disks in different plugs on the mainboard), I'm not sure if that even matters using SATA. Any Ideas what might be the problem here? The OS installed are Windows 7 and Ubuntu 10, the bootloader installed is GRUB. PS: No RAID involved, JBOD.

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• MediaPortal crash when scanning my TV Channels

  - by Martin Ongtangco

  Hello, I tried installing MediaPortal (http://www.team-mediaportal.com) on my old system. I installed & tried both beta & stable releases: Here's the old system specs: Windows XP SP3; 512mb DDR; 80GB IDE; K-World PVR-TV7131 Analog TV-Tuner; Inno3d FX5500 128mb 64bit; When scanning through the TV-Server, it crashes. I don't know if the incompatibility comes from the hardware or the OS, but my TV Tuner's own Media center app works well. For now, that's what im using. Anyone here familiar with MediaPortal? Thanks!

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• Installing Windows Mobile SDK without Visual Studio

  - by Tester101

  Is it possible to install the Windows Mobile SDK without having Visual Studio? I am using SharpDevelop to write a Windows Mobile application, but I need to use an assembly in the Windows Mobile 6.0 SDK. When I try to install the SDK I get a message that says Visual Studio is a prerequisite, and I am un able to install it. Is there a way to trick it in to thinking Visual Studio is installed; maybe a registry entry that can be added or something, or am I just hosed? Is there a reason I need to pay for Microsoft's IDE, or is this just a way for Microsoft to make some extra money? Thanks,

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• Windows XP Disc: corrupt or not corrupt?

  - by Wesley

  Hi all, I just finished one of my builds and am trying to install Windows XP onto it. Here are the specs beforehand... Intel Pentium 4 Northwood 2.4 GHz (512KB L2, 533MHz FSB) QDI Superb 4 Motherboard 2x 1GB PC3200 DDR RAM Seagate 80GB IDE HDD Bestec 250W PSU 16MB NVIDIA TNT2 Pro Samsung DVD-ROM USB 2.0 PCI Card Generic PCI Modem The issue right now is that when I'm running through the Windows Setup from my XP Pro SP3 disc, partway through the setup says that a random file on the disc is corrupt and the computer needs to be restarted. Every time I tried booting it up, a different file was noted as corrupt. However, I tested the same disc on another computer and the Windows XP disc ran to the end of the setup screen without error. I tried this on another computer and the same thing. What could possibly be happening on this one build to cause it errors during the Windows Setup? Thanks in advance.

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• What contributes to smooth online video streaming?

  - by Wesley

  I had a general question about streaming videos online; in particular, on YouTube. What really is required to smoothly stream videos at 360p or 480p? Then for that HD goodness, what really allows a computer to smoothly stream 720p and 1080p? I'm not too sure whether it's to do with the CPU (speed, # cores, cache size), GPU (chipset, VRAM, memory type) or even HDD (IDE vs SATA). What contributes to the ability to stream regular videos and, furthermore, high-definition videos online?

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• eclipse adding java ant based project: Specified buildfile does not contain a javac task

  - by ufk

  Hello. I have a project that i wrote for apache tomcat. I started working with eclipse i want to import the project to eclipse ide. using eclipse 3.6.1. when i create a new project using : File - New - Other - Java - Java Project from Existing Ant Buildfile and i provide the build file location i get the following error: Specified buildfile does not contain a javac task I have a red5 project that i used the same method and it worked. what am i missing? do i need to add something to the ant build file to make it work? what exactly ? where can i find more information regarding this specific subject ? thanks!

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• How does the build quality of laptops compare?

  - by pgwillia

  I'm looking to replace my 5 year old laptop. I want my next laptop to endure at least this long. I typically have Thunderbird, Firefox, Eclipse Java IDE, Skype, a ssh session, and Apache Tomcat running. I'm currently running Karmic Ubuntu, but am agnostic about operating system and would move to Win 7 or OS X. I frequently travel with this computer. I also value battery longevity and power conservation (if possible). Above all I'm looking to minimize cost. I think the hardware that best meets my needs is an Intel i7 processor, 8 GB RAM, 100GB @7200 rpm or SSD hardrive, and about 15 inch monitor. These specs are met by most brands. Does anyone know specific pros/cons and build quality for Macbook Pro, Lenovo Thinkpad (W510 or T510), Sony's VPC-F1190, and ASUS G Series G73JH-X1 NoteBook? Are all i7 processors created equal? Do you have other suggestion that meet my needs?

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• Computer cannot detect hard disk

  - by Nrew

  Details: BIOS: AMI Bios, set primary master to Auto OS: Windows XP Sp2 Memory: 384 Mb Processor: Pentium 3 yeah this one is really very old. And some of the capacitors in the motherboard are already bulging. It detected the hdd yesterday when were trying to fix it and install xp. But today it cannot boot and said: Boot failure. What can you suggest that I would do to revive this old machine. What would be the problem, is it the hdd, the ide cable or the motherboard.

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• newbie hard drive upgrade question

  - by musoNic80

  I have an Acer Aspire 3500WLMi laptop. It currently has a 40gb hard drive which I would like to upgrade. Could someone talk me through the process? I've listed my concerns/queries... Can I buy and install any 2.5" SATA or IDE hard drive into this machine? Should I buy somesort of USB caddy and clone my existing drive onto the new one via USB then physically swap the drives over? My current disk is partitioned to include a small amount of space for a Ubuntu install. Will a clone keep the current partition sizes or is it best for me to repartition once I've cloned? Many thanks.

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• Improve my System, Need some advice/suggestion

  - by Pennf0lio

  Processor: 2.40 gigahertz Intel Core2 Duo Board: ASUSTeK Computer INC. P5B-MX Memory: 2 Gb VideoCard: NVIDIA GeForce 7300 GT HDD: 80GB + 250GB both IDE Operating System: Windows 7 32bit Please give me some advice what to improve in my System. I mainly used it for Graphic Design (eg, Photoshop, Cinema4d, Illustrator, Flash). I was planning to increase my Memory adding 2 GB more, Pushing it to something like 4GB in total. But just found out that recently that I already have 2x2GB installed and should be 4GB in total. When I looked at the properties of my computer, It said "Installed Memory 2GB". I wonder why is that happening? Is the other ram broken?.. I never the computer casing since I bought. so I didn't realize that I already have 2 x 2gb ram. what can you advice. Thanks!

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• Only some motherboards can support faster RAM?

  - by Wesley

  This is a question relating to one of my builds. Here are the specs: ECS P4VXASD2+ V5.0 motherboard Intel P4 Northwood 2.8 GHz (533 MHz FSB, 512 KB L2) 2x 1GB PC3200 DDR RAM Maxtor 300GB IDE HDD 16 MB NVIDIA TNT2 Pro AGP OKIA 300W ATX PSU Gigabyte 52x CD-ROM The issue right now is that I'm trying to install Windows XP from the CD drive but the computer randomly restarts partway through installation. My other build was BSODing due to RAM latency errors. This ECS board manual states that memory modules "up to 333 MHz" (i.e. PC2700) is supported. However, I am running PC3200 modules, which is clearly faster than PC2700. Would this be causing the computer from randomly restarting? EDIT 1: I also wanted to mention that my Emachines T2482 is actually running 2x 512MB PC3200 DDR RAM when it should only be supporting PC1600 and PC2100 DDR RAM. Yet there are no issues with it.

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• Error installing Windows7 64 bits on VirtualBox

  - by MetaDark

  I am trying to set up Windows in Virtual Box, so I don't need to reboot in the rare occasion that I actually need it. The problem is, Virtual Box doesn't preform any errors when I insert the 32bit installation CD but when I try to use the 64bit installation; What!? I am already using the installation disc! I've checked my BIOS to see if I have SVM (AMD's version of VT) disabled and all I see is "Enabled" I have a K9N6PGM2-V2 motherboard A Triple Core AMD Athlon II A Nvdia NForce 430 integrated graphics card 4GB of RAM An 80GB IDE And a 1TB SATA I don't think the last three specifications matter but just in case XP I am pretty sure the CD isn't broken ( I am going to make sure in just a moment ), what could be the cause to this problem? Edit: The 64bit installation CD is not broken, but I found out when trying to install from the 32bit version that it's trying to upgrade, not preform a fresh install - Odd.

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• Recommendation for PCI SATA addon card?

  - by edmicman

  I have a couple of dead PCs from my wife's office that have working SATA HDDs. Sorry, I don't know if they're SATA I or II, just that they're SATA. Unfortunately, all my spare hardware at home is pretty old; all I have is IDE support. I was thinking I could get a PCI addon card on the cheap that would support SATA and put together a budget server of sorts to play with and be able to use those drives. So I've got a couple questions: After some searching it looks like I can get an addon card for ~20 bucks, but it looks like they're all SATA I? Would that matter? It looks like going to SATAII bumps the price up to $40-$60 or so. Are there any recommendations on a card to get?

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• Windows XP Home Edition SP3 cant recognise PCMIA SD Card

  - by Pozo

  System Specifications: Laptop : Dell Inspiron 6000 OS: Windows Home Edition SP3 SD Adapter: Hagiwara Smart Media Adapter I inserted the card into the slot, windows xp recognises the device, lists the pcmia controller on the device manager list, an entry appears under the IDE ATA/ATAPI category on the device manager as well. However, the device does not show under my computer and the driver does not get assigned a letter number. I checked the system logs from the device manager and there were no logged errors. Checking the Hagiwara support website, the manufacturer indicates that the adapter driver is the same as the windows xp pcmia controller. Checking Dell's website, no specific drivers were listed for that either. General Search on the web indicates that multiple people face similar problems with their SD cards, yet none actually spell out the route issue that causes this. Please let me know if you have any suggestions for further debugging. Thanks in advance

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• Recommendation for robust, customizable, open source, Java servlet-based forum software?

  - by Erik Hermansen

  There is a lot of forum software out there, but it seems to me that a lot of the popular choices are PHP-based. And for my project, I'd like something based on Java servlets so my team can make customizations to it. Another important feature is that I can completely change the pages to hide unwanted elements without too much work. So I'm looking either for a template system or easily editable scripts (i.e. JSPs) that have a clean view separation. Just having skin changes or CSS customization is not enough. I understand that if I have open source, I can change anything I want, but my point is that it should be easy and not requiring mastery of a complex code base. Finally, I want something that has been around for at least a year and deployed on some high-traffic sites. Clustering support (one database, multiple web servers) is highly desirable. Up-time is crucial since I have an SLA to support. What do you think?

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• After enabling raid0, blue screen of death

  - by thegreyspot

  Hi! Im trying to get a raid0 setup going. I have a 750 gb hdd with the OS on it and two 80gb HDD. For right now, I just want to raid0 on the two 80Gb hdd. When I enable raid in my Bios, Win7 has a BSOD during boot. As far as I understand I need to install raid drivers. However how can I do this? The win7 DVD doesnt seem to have a driver install option. Any suggestions? Thanks EDIT: I saw that there was as seperate setting for the 4th and 5th sata ports. So I pluged in my OS drive into there and left it on IDE. Still didnt work though, am I miss understanding that idealogy?

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