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  • best filesystem for an aws s3 like service

    - by gucki
    Hi! I need to build a fault tolerant, highly available key/value storage (no posix, only same functionaluty as S3) using cheap existing hardware. The storage should be able to handle several billions of items. The maximum size of items is around 1GB, most are only several KB. What's the best software/ filesystem for this task? I already had a brief look at mogilefs, mongodb (grid-fs) & glusterfs but I'm not really sure which is stable & fault tolerant enough. The simpler the setup and later expansion the better :). Corin

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  • Wake network adapter from deep sleep mode

    - by BeatMe
    I recently buyed a new Mainboard (Asrock ALiveXFire) and got some trouble with the network adapter. After switching my Windows 7 x64 in energey saving mode and returning from it, my network adapter couldn't be found. After some googling I found out, that apparently my network adapter has been put in a deep sleep mode and didn't reactivate. Their solution was to switch the PC off, take out the RAM and the CMOS battery for some time. After that, the adapter should be powered on again, but that didn't happen for me. I waited several hours before turning my PC on again, but that didn't help. Formatting and reinstalling didn't help either. The network adapter is not found in the hardware manager and reinstalling the drivers didn't help. I have the newest BIOS installed on the mainboard. I literally don't know what to try next. I'm thinking of returning my board, but I would like to avoid the hassle.

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  • Unlocking AMD Phenom II X2 550 Black Edition cores - what are the risks?

    - by Vilx-
    I've got the above mentioned CPU and a GigaByte GA-MA790XT-UD4P motherboard, which should be capable of unlocking the extra two cores - if I'm lucky and they're not faulty. The Internet is full of instructions on how to do that. What I don't have is spare money to buy new hardware if I brick something. What are the risks when attempting to do this? Is it completely safe, or can I be left with an expensive pile of junk? What should I keep in mind when doing so? Bigger cooler maybe (I'm running with the default box cooler)? Should I lower the frequencies too? I've never done any OC before.

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  • Can a virtual mikrotik box bridge a hyper-v internal network with a hyper-v external network?

    - by mcfrosty
    I am trying to set up a Mikrotik router as a transparent firewall on my network. I got the machine working on a hardware MT box, but my boss wants the MT virtualized. I have been trying the set up where my virtual windows box talks to the Mikrotik via private or internal network on the Hyper-V host. I can get the two machines to talk, but as soon as I set up a bridge on the MT, all traffic ceases between the two. Is it possible to create a bridge for this purpose (having the MT silently in front of my firewalled server)? I could really use some help.

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  • OpenVZ multiple networks on CTs

    - by picca
    I have Hardware Node (HN) which has 2 physical interfaces (eth0, eth1). I'm playing with OpenVZ and want to let my containers (CTs) have access to both of those interfaces. I'm using basic configuration - venet. CTs are fine to access eth0 (public interface). But I can't get CTs to get access to eth1 (private network). I tried: # on HN vzctl set 101 --ipadd 192.168.1.101 --save vzctl enter 101 ping 192.168.1.2 # no response here ifconfig # on CT returns lo (127.0.0.1), venet0 (127.0.0.1), venet0:0 (95.168.xxx.xxx), venet0:1 (192.168.1.101) I believe that the main problem is that all packets flows through eth0 on HN (figured out using tcpdump). So the problem might be in routes on HN. Or is my logic here all wrong? I just need access to both interfaces (networks) on HN from CTs. Nothing complicated.

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  • Why doesn’t windows explorer show my removable / USB drive even though the command prompt does ?

    - by Gishu
    I'm running WinXP SP2. Around 50% of the time, when I slot in my USB drive. Windows explorer refuses to show the drive. If I click on the Safely remove hardware icon on the tray, I can see a menu item for the drive - say drive G: (the light on the USB drive is also on) If I type in G: into the address bar of explorer, it says 'Cannot find...' If I type in G: into a command prompt window, it works and I can do a dir to see the list of directories on the drive. To fix this, I've to remove-reinsert the pen-drive. But doing it every day is annoying. Also this happens only on this machine.. I use this drive on my home machine and it works flawlessly each time. Can anyone suggest things that I could try ? Thanks for reading...

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  • Print driver installs failing

    - by Kasius
    All of the Windows 7 64-bit Enterprise machines in my organization are failing to install a good number of printer drivers that previously installed without issue. This only happens with printer drivers. And not with all printer drivers. Just some. Network drivers, video drivers, etc. have had no problems. Here is part of setupapi.dev.log for a Dymo LabelWriter printer driver that is failing to install: dvi: {Plug and Play Service: Device Install for USBPRINT\DYMOLABELWRITER_450_TURBO\6&538F51D&0&USB001} ump: Creating Install Process: DrvInst.exe 09:36:58.071 ndv: Infpath=C:\Windows\INF\oem0.inf ndv: DriverNodeName=dymo.inf:DYMO.NTamd64.6.0:LW_450_TURBO_VISTA:8.1.0.363:usbprint\dymolabelwriter_450_aa08 ndv: DriverStorepath=C:\Windows\System32\DriverStore\FileRepository\dymo.inf_amd64_neutral_3a631b118b7a5828\dymo.inf ndv: Building driver list from driver node strong name... dvi: Searching for hardware ID(s): dvi: usbprint\dymolabelwriter_450_aa08 dvi: dymolabelwriter_450_aa08 inf: Opened PNF: 'C:\Windows\System32\DriverStore\FileRepository\dymo.inf_amd64_neutral_3a631b118b7a5828\dymo.inf' ([strings]) dvi: Selected driver installs from section [LW_450_TURBO_VISTA] in 'c:\windows\system32\driverstore\filerepository\dymo.inf_amd64_neutral_3a631b118b7a5828\dymo.inf'. dvi: Class GUID of device changed to: {4d36e979-e325-11ce-bfc1-08002be10318}. dvi: Set selected driver complete. ndv: {Core Device Install} 09:36:58.133 inf: Opened INF: 'C:\Windows\INF\oem0.inf' ([strings]) inf: Saved PNF: 'C:\Windows\INF\oem0.PNF' (Language = 0409) dvi: {DIF_ALLOW_INSTALL} 09:36:58.164 dvi: Using exported function 'ClassInstall32' in module 'C:\Windows\system32\ntprint.dll'. dvi: Class installer == ntprint.dll,ClassInstall32 dvi: No CoInstallers found dvi: Class installer: Enter 09:36:58.164 dvi: Class installer: Exit dvi: Default installer: Enter 09:36:58.180 dvi: Default installer: Exit dvi: {DIF_ALLOW_INSTALL - exit(0xe000020e)} 09:36:58.180 ndv: Installing files... dvi: {DIF_INSTALLDEVICEFILES} 09:36:58.180 dvi: Class installer: Enter 09:36:58.180 inf: Opened INF: 'C:\Windows\System32\DriverStore\FileRepository\dymo.inf_amd64_neutral_3a631b118b7a5828\dymo.inf' ([strings]) inf: Opened INF: 'C:\Windows\System32\DriverStore\FileRepository\dymo.inf_amd64_neutral_3a631b118b7a5828\dymo.inf' ([strings]) !!! dvi: Class installer: failed(0x00000490)! !!! dvi: Error 1168: Element not found. dvi: {DIF_INSTALLDEVICEFILES - exit(0x00000490)} 09:37:22.063 ndv: Device install status=0x00000490 ndv: Performing device install final cleanup... ! ndv: Queueing up error report since device installation failed... ndv: {Core Device Install - exit(0x00000490)} 09:37:22.063 dvi: {DIF_DESTROYPRIVATEDATA} 09:37:22.063 dvi: Class installer: Enter 09:37:22.063 dvi: Class installer: Exit dvi: Default installer: Enter 09:37:22.063 dvi: Default installer: Exit dvi: {DIF_DESTROYPRIVATEDATA - exit(0xe000020e)} 09:37:22.063 ump: Server install process exited with code 0x00000490 09:37:22.063 ump: {Plug and Play Service: Device Install exit(00000490)} Notice these lines in particular: !!! dvi: Class installer: failed(0x00000490)! !!! dvi: Error 1168: Element not found. dvi: {DIF_INSTALLDEVICEFILES - exit(0x00000490)} 09:37:22.063 ndv: Device install status=0x00000490 From what I have read, the "Element not found" error should be accompanied by an event describing what element was not found. The error that appears in Device Manager is "The driver cannot be installed because it is either not digitally signed or not signed in the appropriate manner." It appears to be signed fine though. It has an accompanying .CAT file and worked previously. And when installing, the following messages are logged in setupapi.dev.log: sto: {DRIVERSTORE_IMPORT_NOTIFY_VALIDATE} 09:36:56.277 inf: Opened INF: 'C:\Windows\System32\DriverStore\Temp\{272e2305-961c-7942-9ede-966f01047043}\dymo.inf' ([strings]) sig: {_VERIFY_FILE_SIGNATURE} 09:36:56.292 sig: Key = dymo.inf sig: FilePath = C:\Windows\System32\DriverStore\Temp\{272e2305-961c-7942-9ede-966f01047043}\dymo.inf sig: Catalog = C:\Windows\System32\DriverStore\Temp\{272e2305-961c-7942-9ede-966f01047043}\DYMO.CAT sig: Success: File is signed in catalog. sig: {_VERIFY_FILE_SIGNATURE exit(0x00000000)} 09:36:56.355 sto: Validating driver package files against catalog 'DYMO.CAT'. sto: Driver package is valid. sto: {DRIVERSTORE_IMPORT_NOTIFY_VALIDATE exit(0x00000000)} 09:36:56.402 sto: Verified driver package signature: sto: Digital Signer Score = 0x0D000005 sto: Digital Signer Name = Microsoft Windows Hardware Compatibility Publisher Now here's where it gets strange. If I take it off the domain, it installs fine. But it doesn't seem to have anything to do with Group Policy. I moved the machine to an OU that blocks inheritance, ran a gpupdate, ran rsop.msc to verify, and tried again. And it still didn't work. Likewise, I removed a machine from the domain, manually set all of the domain Group Policy settings in gpedit.msc, and tried that way, and it worked fine. So it seems like the Group Policy settings are irrelevant. What other domain-related issue could be causing this though? Any ideas on what to try next would be greatly appreciated. I'm not sure where to go from here. Thanks!

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  • Configuring Notepad++ to run knitr2pdf

    - by Stat-R
    Sorry for such a basic question but since I do not have a degree in programming... I am a user of R, knitr and Notepad++. I was trying to configure Notepad++ to run pdflatex and knitr(knit2pdf). By googling I found how to do it for pdflatex but I did not find anything for sweave/knitr. The following are the good ones for pdflatex http://www2.sofi.su.se/~mbe/docs/npp_r_latex.pdf http://www.tlhiv.org/ma497/software/ I inserted cmd /c cd /d "$(CURRENT_DIRECTORY)" && pdflatex.exe -shell-escape "$(FILE_NAME)" into the runrun menu in Notepad++. I do not fully understand the command though. I will appreciate any help on this. Please direct me if you can to any resource for learning these commands. I will be grateful to get any help in configuring Notepad++ for running knitr.

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  • Windows SBS 2011 DNS Role (service) failing & needing restarting

    - by HaydnWVN
    Have a Windows SBS 2011 with Exchange that is handling all DNS for the network. Since getting a 3rd party (Hardware & Support) to setup a recieving FTP service and restricting Exchanges memory useage for another 3rd party product (Stock software) the local network seems to periodically 'lose the internet connection'. Delving deeper I found that the DNS service is somehow failing/stopping without the actual service on the server reporting such (nothing in event logs). A simple restart of the 'DNS Role' on the server solves the problem. The manager onsite reports that he has to do this most days in the afternoon - yet not at the same time and other days it works fine without a restart being required. I'm unable (lacking sufficient SBS2011 knowledge) to diagnose this further, ideally I would like the DNS Role to report (and log) the failure, then automatically restart itself.

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  • SOHO Netflix and network security

    - by TW
    I want to use WIFI for HiDef video, but I don't trust it for my office PC's. I've heard of VLANs but I have no idea how to set it up or what (SOHO) hardware to buy. Other than getting 2 different DSL lines, how can I be absolutely sure that the PC side doesn't get hacked? What if I want to use MS Home server as a backup device for both sides? Can I make it "read only" for the PC side, and physically change the cable if I need to restore? TW

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  • Cannot import video from a DV camcorder over FireWire

    - by qbeuek
    I have a JVC GR-D320 miniDV camcorder that has a FireWire interface. I recently upgraded to Windows 7 RTM (64 bit, fresh installation). When I connect my camcorder through FireWire, I can see it in Device Manager without any warnings or problems, but I cannot capture videos from my miniDV tapes. After connecting, AutoPlay displays "Import Video could not find a compatible digital video device. Verify that the digital video device is properly connected and turned on." When using Windows Live Photo Gallery after selecting the import option, my camera is not listed. The camera used to work perfectly on the same hardware before upgrading to Windows 7 RTM 64 bit (it used to work fine on Windows XP SP3 32 bit). Googleing revealed that people had the exact same problems in Vista, but no solution was provided. Any help?

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  • How to access an SD card from a virtual machine?

    - by Punit Soni
    I want to format an SD card from my Linux virtual machine. I have a built-in SD card reader in my laptop. I tried using VirtualBox and VMware Player and installed Ubuntu 10.04 guest. None of them are showing the SD card reader as a device. I can access the SD card from the Windows host. I am not interested in solutions using shared folders as I want to access the SD card as hardware (it should show up in /dev). I basically want to set up the SD card for BeagleBoard, but I don't want to install physical Ubuntu in my PC.

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  • Links to detailed instructions on building a DIY NAS

    - by Kaushik Gopal
    I'm looking for good links with detailed instructions on how to build a DIY NAS (Network Access Storage). I'm planning on doing it cheap (old PC config + open source software). I did a fair bit of searching and found these links (so please suggest others). Ubuntu Setting up a Home NAS DIY NAS Smackdown How to Configure an $80 File Server in 45 Minutes FreeNAS Build a NAS Device With an Old PC and Free Software Build Your Own NAS Device While these links are great they delve more on the hardware side. I'm looking for more instructions in the software side.

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  • "broken" windows xp after disc replacement

    - by epeleg
    Windows xp pro OEM was installed on my machine, Disk was failing so I cloned it to a new disk (larger one). Now windows said that the hardware has changed significantly and I need to re-activate, and I would gladly do (got the product number on a sticker on the machine) - only that for running the activation process I need to be logged-in, but when I try to login it just automatically logs me out again :( I know my credentials are O.K. because I can connect to the machine remotely and also use sysinternals tools such as PsExec or PSList etc. on it from a remote machine by specifying user and pasword. Login via safemode does not work any differently then in normal mode... I tried to run rundll32.exe syssetup,SetupOobeBnk (as suggested in several places on the net) using PsExec but it did not seem to help... Is there any way out of this evil circle? [ can't log in because not activated - cant activate because not logged in ]

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  • unable to install new versions of linux on my PC

    - by iamrohitbanga
    I have an MSI-RC410 motherboard with onboard ATI Radeon XPress 200 series Graphics card. I have used OpenSuse-11.0 on my PC for over an year. but when I tried to upgrade to OpenSuse-11.1, I managed to install it only to find that several features were missing. for example /dev/cdrom was missing. Also install DVD of Fedora 11 did not work. I have also tried Ubuntu-9.10 live cd. When I boot from the CD i get the initramfs command prompt. Still able to install old versions of these OSs. What is the reason for this behavior? Does it have to do anything with the new version of the linux kernel not being compatible with my hardware? What should i do to install new versions of Linux?

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  • Fedora Installation with software repository in DVD does not work

    - by Raks
    I bought a new assembled PC with processor as Core-i3(2120) and Intel H61 motherboard and was trying to install Fedora 16 from a DVD. This DVD contains all the packages so that installation does not require to download packages from internet. I have used this DVD to install Fedora 16 offline many a times though in machines with different hardware configuration. But in this new machine when the installation reaches the stage wherein it asks for Software repository selection I select CD/DVD but the system fails to read the media and throws up an error that it cannot detect the media. THe LED in the DVD writer also indicate that the DVD is not being read. Now there is neither a problem with the DVD or the DVD drive because the installation started from the DVD itself. So what could the problem be, anything in the BIOS that is causing the problem, Is there any way I could utilize the packages already existing in the CD so that I save downloading the packages from DVD

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  • Windows XP loses drive letter for existing partition on disk

    - by Kev
    Hi, apologies if this has already been asked - I couldn't spot anything exactly the same. I'm looking for help on the fact that Windows XP has suddenly decided to stop assigning a drive letter to the second partition on my laptop's disk. I haven't added or changed hardware and I keep everything pretty clean in terms of software installed. I've partitioned the disk into a system partition on C: and a user partition on d: but lately, when booting or coming out of hibernation or sometime from stand-by, Windows will lose it's d: mapping. If I notice and remap it from MMC, everything will be perfectly happy and will keep going. Any help on this will be greatly appreciated. Cheers, Kev

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  • Classic ASP on large memory server

    - by Steve Evans
    I have a client with a large ASP app that apparently is fairly memory intensive. I’m helping them migrate to new hardware they have running Win2k8 R2. They have 4 physical servers with 32gb of RAM each. I’m making the assumption that ASP apps run as a x32 process. So I see that we have two options: On the application pool enable web gardens. Use the physical servers as VM hosts and split the box into say 4 web servers each. Any thoughts on which path will provide us better performance? I’m just not really sure how ASP will handle a machine with lots of memory, and I’m worried it won’t really be able to address the memory well. (you can ignore all the obvious stuff like increased maintenance of 16 web servers vs 4, or the flexibility virtualization gets us over physical servers, etc)

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  • unable to install new versions of linux on my PC

    - by iamrohitbanga
    I have an MSI-RC410 motherboard with onboard ATI Radeon XPress 200 series Graphics card. I have used OpenSuse-11.0 on my PC for over an year. but when I tried to upgrade to OpenSuse-11.1, I managed to install it only to find that several features were missing. for example /dev/cdrom was missing. Also install DVD of Fedora 11 did not work. I have also tried Ubuntu-9.10 live cd. When I boot from the CD i get the initramfs command prompt. Still able to install old versions of these OSs. What is the reason for this behavior? Does it have to do anything with the new version of the linux kernel not being compatible with my hardware? What should i do to install new versions of Linux?

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  • Ultra Low Latency Linux Distribution or Kernel

    - by Zanlor
    I'd like to know if there are any linux distributions that are focused on low latency networking. The area I'm working in is algorithmic trading, and extremely low latency comms between machines is a must. The current h/w we're using is 10g ethernet, we're looking into things like infiniband RDMA and Voltaire VMA I've googled around, and have only been able to find tidbtits of kernel patches, command line options and hardware suggestions. I'm looking for a complete solution, specially built kernel, kernel bypass features, essentially all the goodies rolled up into one package - does such a thing even exist? I ask as a lot of this stuff seems to be a black art, people keep secret what they know works etc.

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  • Ultra Low Latency Linux Distribution or Kernel

    - by Zanler
    I'd like to know if there are any linux distributions that are focused on low latency networking. The area I'm working in is algorithmic trading, and extremely low latency comms between machines is a must. The current h/w we're using is 10g ethernet, we're looking into things like infiniband RDMA and Voltaire VMA I've googled around, and have only been able to find tidbtits of kernel patches, command line options and hardware suggestions. I'm looking for a complete solution, specially built kernel, kernel bypass features, essentially all the goodies rolled up into one package - does such a thing even exist? I ask as a lot of this stuff seems to be a black art, people keep secret what they know works etc.

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  • Keep-Alive header not sent from Tomcat 5.5 http connector?

    - by Codek
    Hi, We're currently using a hardware load balancer, which then goes to Apache and that then goes to Tomcat 5.5 via the AJP connector. We've decided to dump apache for various reasons - In our current system it doesnt provide any advantage. However when I look at the headers sent when we do this, the "Keep-Alive: timeout=15 max=96" header doesnt get sent when you use the tomcat http connector Interestingly, i can find no documentiation on "keepalivetimeout" for tomcat5.5, but i can for tomcat6. But neither can i find evidence that tomcat5.5 doesnt support this setting. here's my connector: <Connector port="8090" maxHttpHeaderSize="8192" maxThreads="400" minSpareThreads="150" maxSpareThreads="300" enableLookups="false" connectionTimeout="2" maxKeepAliveRequests="400" disableUploadTimeout="true" /> So; Is there any way I can specify the keepalive timeout if we use the http connector with tomcat 5.5, and force this header entry to be sent? Thanks, Dan

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  • Windows 7 Activation with Bootcamp and VMWare

    - by Jason Hernandez
    I have windows 7(64) installation setup on a Boot Camp partition on my MacBook Pro 13". I also access this partition through VMware hosted by OS X (snow leopard). Every time I switch between VMware and Boot Camp windows says that it needs to be re-activated because of hardware or driver changes. I've tried wmware KB KB 1003426 to no avail. Edo Thanks, Jason Edit, I am using the most recent VMware and tools. I've tried "KB 1004917" as well. No Dice. I'm considering re-installing at this point.

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  • Back / Forward mouse buttons do not work in VMWare Workstation 6.5 Guest OS

    - by Tim Lara
    I am using a Logitech G9 mouse and running VMWare Workstation 6.5.3 on Vista x64. The guest OS is Win XP, and has the most current version of VMWare Tools installed. Left / right buttons and mouse wheel scrolling work fine in the guest OS, but the back / forward buttons are apparently not recognized. I have tried installing the Logitech software inside the guest OS as well, but it still did not recognize the back / forward buttons. (I didn't really expect this to work since the guest OS doesn't actually see the mouse hardware as a Logitech G9 directly anyway.) I vaguely remember seeing something a while back about editing the virtual machine config file to specify a 5-button mouse rather than the default 3-button setup, but I can't seem to find any specifics on how to do so in the VMWare documentation. Does anyone know if such a workaround exists, or is 5-button mouse functionality just not supported?

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  • One bigger Virtual Machine in Cloud

    - by flyer
    I just setup virtual machines on one hardware with Vagrant (this is just a test environment, not production!). I want to use a Puppet to configure them and next try to setup OpenStack. I am not sure If I am understanding how this should look at the end. Is it possible to have below architecture with OpenStack after all where I will run one Virtual Machine with e.g. 12 cores? ------------------------------- | VM (12c) | ------------------------------- | NOVA | NOVA | NOVA | ------------------------------- | OpenStack | ------------------------------- | VM (4c) | VM (4c) | VM (4c) | ------------------------------- | Bare Metal (8c) | ------------------------------- I need this information to have a bigger picture to continue.

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