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  • On Server Disk Storage VS SAN Storage

    - by Justin
    Hello, I am looking at buying three servers, and trying to figure out which storage solution makes the most sense in terms of performance and cost. Total budget is around: $10,000. OPTION 1: Dell servers with RAID 10 (4 Drives) each 7200RPM SAS 500GB, for a total capacity of 1TB. Each server is approx: $3000. Total storage then across all three servers is 3TB. OPTION 2: Same Dell servers with a cheap single drive no RAID for $2000 and go with a centralized SAN solution. The biggest problem is that I haven't been able to even find a SAN solution that is a reasonable price. Dell entry level storage servers are like $15,000. I am thinking just iSCSI, not fiber (too expensive). What do you guys recommend?

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  • Intel 520 SSD drives not working with lsi controller on VMware esxi 5

    - by Michael
    We have a problem with our LSI 9266 controller. LSI have vmware drivers which normally show the health status of connected drives, raid controller, battery etc from within the vSphere Client. This driver also allows connectivity from the LSI MSM utility from a windows workstation. The problem is as soon as I connect my intel 520 SSD drives the health status in the vsphere client disappears, also we lose connectivity via the LSI MSM utlity. Any other drives we test are fine, 1TB SAS drives, other SSD drives etc are all OK. The Intel drives are on the compatability list and are supported by LSI but dont work with the VMware driver. If I install a windows OS on the physical server we have no problems. I have logged a ticket with LSI but they havent been very helpful. I am trying to find other people that may have had the same issue and maybe even a fix

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  • Slow NFS transfer performance of small files

    - by Arie K
    I'm using Openfiler 2.3 on an HP ML370 G5, Smart Array P400, SAS disks combined using RAID 1+0. I set up an NFS share from ext3 partition using Openfiler's web based configuration, and I succeeded to mount the share from another host. Both host are connected using dedicated gigabit link. Simple benchmark using dd: $ dd if=/dev/zero of=outfile bs=1000 count=2000000 2000000+0 records in 2000000+0 records out 2000000000 bytes (2.0 GB) copied, 34.4737 s, 58.0 MB/s I see it can achieve moderate transfer speed (58.0 MB/s). But if I copy a directory containing many small files (.php and .jpg, around 1-4 kB per file) of total size ~300 MB, the cp process ends in about 10 minutes. Is NFS not suitable for small file transfer like above case? Or is there some parameters that must be adjusted?

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  • Home ZFS based NAS...What processor/chipset to use?

    - by MrBlargityBlarg
    So, I'm building a home/personal NAS. My plan is to expose both SMB fileshares for sharing files/media between hosts, but also to carve an iSCSI target LUN out of it for use by VMWare as a datastore. I want to use ZFS (software RAID) so that means I'll either be using FreeNAS, Solaris Express, or OpenIndiana. My question is basically: How much horsepower do I need? Obviously I/O is going to be my bottleneck but I want to be sure that I am not limiting my I/O because of a slow processor or chipset. So far the hardware plan is to use an Intel i3 and motherboard with one of the H87, Q87, or Z87 chipsets, a SAS controller (JBOD, no RAID) and if budget allows, I'm also hoping to get an SSD for the ZFS L2ARC and ZIL. Does anyone think I could get away with an Intel Atom or cheaper/less-capable processor/chipset than the i3 and [HQZ]87 listed above?

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  • MySQL installation question.

    - by srtriage
    I am far from a DBA and have a question. Recently I installed MySQL. On my machine C:\ is a 50GB partition of two mirrored 10k SAS drives. The remaining space on those drives is allocated to D:. I also have a SSD mounted as E:. When I installed MySQL, I installed it to E:\ assuming that that is where the database information would be held since I had installed it there. I am now seeing C:\ProgramData\MySQL\MySQL Server 5.1\data\peq, peq being the name of my main database. Is my database being stored in C:\ and if so, how do I fix it to store the DB on the SSD?

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  • AutoCAD 11 and network file shares

    - by gravyface
    Small network of perhaps half a dozen engineers, currently working on local copies of AutoCAD project files, which are then copied back up to file server (2008 Standard, 1-2 year old Dell server hardware, RAID 5 SAS disks (10k? not positive)) at end of day. To me, this sounds horribly inefficient and error-prone, however, I've been told that "AutoCAD and network files = bad idea" and this is gospel. The network is currently 10/100 (perhaps this is the reason for the "gospel") but all the workstations are within 2 years old and have GbE NICs so an upgrade of the core switch is long overdue. However, I know certain applications don't like network access, at all, and any sign of latency or disruption brings the whole thing crashing down. Anyone care to chime in?

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  • Linux: How to delay hddtemp service start at boot until all hdd are visible?

    - by Atis
    I live in a hot and humid environment, therefore I monitor the hdd temperature using hddtemp and gkrellm. There is an LSI9211 8i sata/sas controller in my computer. I have drives connected to both my motherboard and the LSI. hddtemp monitors only the drives directly connected to my motherboard after booting the system, therefore gkrellm displays the temperature of those drvies only. Logging in and restarting hddtemp before starting gkrellm fixes my issue, i.e. drives connected to the LSI controller are also visible. It seems that the drives connected to the LSI controller become visible only after hddtemp is started in the boot sequence. I think delaying it would help. How can I delay the starting of hddtemp till all drives are visible? I prefer a way to check if drives are visible to the delay of a specific amount of seconds.

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  • Is there an alternative to Google Code Search?

    - by blunders
    Per the Official Google Blog: Code Search, which was designed to help people search for open source code all over the web, will be shut down along with the Code Search API on January 15, 2012. Google Code Search is now gone, and since that makes it much harder to understand the features it presented, here's my attempt to render them via information I gathered from a cache of the page for the Search Options: The "In Search Box" just notes the syntax to type the command directly in the main search box instead of using the advance search interface. Package (In Search Box: "package:linux-2.6") Language (In Search Box: "lang:c++") (OPTIONS: any language, actionscript, ada, applescript, asp, assembly, autoconf, automake, awk, basic, bat, c, c#, c++, caja, cobol, coldfusion, configure, css, d, eiffel, erlang, fortran, go, haskell, inform, java, java, javascript, jsp, lex, limbo, lisp, lolcode, lua, m4, makefile, maple, mathematica, matlab, messagecatalog, modula2, modula3, objectivec, ocaml, pascal, perl, php, pod, prolog, proto, python, python, r, rebol, ruby, sas, scheme, scilab, sgml, shell, smalltalk, sml, sql, svg, tcl, tex, texinfo, troff, verilog, vhdl, vim, xslt, xul, yacc) File (In Search Box: "file:^.*.java$") Class (In Search Box: "class:HashMap") Function (In Search Box: "function:toString") License (In Search Box: "license:mozilla") (OPTIONS: null/any-license, aladdin/Aladdin-Public-License, artistic/Artistic-License, apache/Apache-License, apple/Apple-Public-Source-License, bsd/BSD-License, cpl/Common-Public-License, epl/Eclipse-Public-License, agpl/GNU-Affero-General-Public-License, gpl/GNU-General-Public-License, lgpl/GNU-Lesser-General-Public-License, disclaimer/Historical-Permission-Notice-and-Disclaimer, ibm/IBM-Public-License, lucent/Lucent-Public-License, mit/MIT-License, mozilla/Mozilla-Public-License, nasa/NASA-Open-Source-Agreement, python/Python-Software-Foundation-License, qpl/Q-Public-License, sleepycat/Sleepycat-License, zope/Zope-Public-License) Case Sensitive (In Search Box: "case:no") (OPTIONS: yes, no) Also of use in understanding the search tool would be the still live FAQs page for Google Code Search. Is there any code search engine that would fully replace Google Code Search's features?

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  • Disabling RAID feature on HP Smart Array P400

    - by Arie K
    I'm planning to use ZFS on my system (HP ML370 G5, Smart Array P400, 8 SAS disk). I want ZFS to manage all disks individually, so it can utilize better scheduling (i.e. I want to use software RAID feature in ZFS). The problem is, I can't find a way to disable RAID feature on the RAID controller. Right now, the controller aggregates all of the disks into one big RAID-5 volume. So ZFS can't see individual disk. Is there any way to acomplish this setup?

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  • hosting environment for delivering FLVs

    - by Gotys
    What would be the ideal hardware setup for pushing lots of bandwith on a tube site? We have ever-expanding cloud storage where users upload the movies, then we have these web-delivery machines which cache the FLV files on its local harddrives and deliver them to users. Each cache machine can deliver 1200 mbits/s , if it has SAS 8 harddrives. Such a cache machine costs us $550/month for 8x160gb -- so each machine can cache only 160GB at any given time. If we want to cache more then 160gb , we need to add another machine..another $550/month..etc. This is very un-economical so I am wondering if we have any experts here who can figure out a better setup. I've been looking into "gluster FS", but I am not sure if this thing can push a lot of bandwith. Any ideas highly appreciated. Thank you!

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  • Proper use of disk to disk to tape backup using de-duplication and LTO5

    - by Michael
    I currently have ~12TB of data for a full disk to tape (LTO3) backup. Needless to say, it's now requiring over 16 tapes so I'm looking at other solutions. Here is what I've come up with. I'd like to hear the community's thoughts. Server for Disk-to-Disk BackupExec 2010 Using De-duplication Technology 20+TB worth of SATA drives LTO5 robotic library connected via SAS 1Gbps NIC connected to network What I envision is doing a full backup of my entire network which will initially take a long time over the 1Gbps NIC but once the de-duplication kicks in backups should be quick. I will then use the LTO5 to make disk to tape backups and archive those accordingly. What does everyone think? Any faster way of doing the initial full backup over the 1Gbps NIC? What will be my pain points? Is there a better way of doing what I'm trying to achieve?

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  • Getting FC11 to run under VMware Server, converted from physical machine

    - by Kristian
    I have a FC11 installation that I have converted to a VMware disk image to run om my VMware Server. I converted it with qemu-img, as the VMware Converter software apparently only converts Linux hosts to VMware Infrastructure servers. The disk image boots fine (grub is loaded and boots the kernel) but it seems like the disk is not found by the kernel, and the boot process stalls. Hotplugging USB devices work (the kernel prints debug information) and I'm able to press keys (Ctrl-Alt-Delete for instance). The VMware guest OS is set to RedHat Enterprise Linux 5 (32 bit), and I have tried both the LSI Logic, LSI Logic SAS and VMware Accelerated SCSI SCSI controllers, to no avail. I'm able to boot an installer disk and get into rescue mode and mount the filesystem, so my question is, what do I need to do to the guest kernel / initrd image to make it recognize the virtual disk?

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  • CodePlex Daily Summary for Tuesday, July 16, 2013

    CodePlex Daily Summary for Tuesday, July 16, 2013Popular ReleasesOsmSharp: OsmSharp v3.1.4840.2: Release notes: - Fixed issue: http://osmsharp.codeplex.com/workitem/1246 'Optimized route has zero TotalDistance' - Fixed lazy loading strategy for datasource routing. - Fixed precision bug in View. - Added unittests for instruction generation. - Added daily build nuget packages: Daily build packages at http://5.9.56.3:8080/guestAuth/app/nuget/v1/FeedService.svc/ - Fixed default direction on roundabout: roundabouts are always oneway. - Take average left+right turn. - Fixed UTF8 encoding issu...PMU Connection Tester: PMU Connection Tester v4.4.0: This is the current release build of the PMU Connection Tester, version 4.4.0 This version of the connection tester was released with openPDC 1.5 SP1 and openPDC 2.0 BETA. This application requires that .NET 4.0 already be installed on your system. Note this is the last release of the PMU Connection Tester that will built on .NET 4.0 using the TVA Code Library and the Time-series Framework. Future releases of the PMU Connection Tester will be built on .NET 4.5 (or later) using the Grid Sol...WatchersNET.SiteMap: WatchersNE​T.SiteMap 01.03.08: changes Localized Tab Name is now usedStackWalker - Walking the callstack: StackWalker - 2013-07-15: This project describes and implements the (documented) way to walk a callstack for any thread (own, other and remote). It has an abstraction layer, so the calling app does not need to know the internals. This release has some bugfixes for VC5/6.GoAgent GUI: GoAgent GUI 1.1.0 ???: ???????,??????????????,?????????????? ???????? ????: 1.1.0? ??? ?????????? ????????? ??:??cn/hk????,?????????????????????。Hosts??????google_hk。Wsus Package Publisher: Release v1.2.1307.15: Fix a bug where WPP crash if 'ShowPendingUpdates' is start with wrong credentials. Fix a bug where WPP crash if ArrivalDateAfter and ArrivalDateBefore is equal in the ComputerView. Add a filter in the ComputerView. (Thanks to NorbertFe for this feature request) Add an option, when right-clicking on a computer, you can ask for display the current logon user of the remote computer. Add an option in settings to choose if WPP ping remote computers using IPv4, IPv6 or IPv6 and, if fail, IP...Lab Of Things: vBeta1: Initial release of LoTVidCoder: 1.4.23: New in 1.4.23 Added French translation. Fixed non-x264 video encoders not sticking in video tab. New in 1.4 Updated HandBrake core to 0.9.9 Blu-ray subtitle (PGS) support Additional framerates: 30, 50, 59.94, 60 Additional sample rates: 8, 11.025, 12 and 16 kHz Additional higher bitrates for audio Same as Source Constant Framerate 24-bit FLAC encoding Added Windows Phone 8 and Apple TV 3 presets Introduced process isolation for encodes. Now if HandBrake crashes, VidCoder will ...Microsoft Ajax Minifier: Microsoft Ajax Minifier 4.96: Fix for issue #19957: EXE should output the name of the file(s) being minified. Discussion #449181: throw a Sev-2 warning when trailing commas are detected on an Array literal. Perfectly legal to do so, but the behavior ends up working differently on different browsers, so throw a cross-browser warning. Add a few more known global names for improved ES6 compatibility update Nuget package to version 2.5 and automatically add the AjaxMin.targets to your project when you update the package...Outlook 2013 Add-In: Categories and Colors: This new version has a major change in the drawing of the list items: - Using owner drawn code to format the appointments using GDI (some flickering may occur, but it looks a little bit better IMHO, with separate sections). - Added category color support (if more than one category, only one color will be shown). Here, the colors Outlook uses are slightly different than the ones available in System.Drawing, so I did a first approach matching. ;-) - Added appointment status support (to show fr...TypePipe: 1.15.2.0 (.NET 4.5): This is build 1.15.2.0 of the TypePipe for .NET 4.5. Find the complete release notes for the build here: Release Notes.re-linq: 1.15.2.0 (.NET 4.5): This is build 1.15.2.0 of re-linq for .NET 4.5. Find the complete release notes for the build here: Release Notes To use re-linq with .NET 3.5, use a 1.13.x build.Columbus Remote Desktop: 2.0 Sapphire: Added configuration settings Added update notifications Added ability to disable GPU acceleration Fixed connection bugsDataDevelop: Beta 0.6.5: Hotfix bug in Python Table.ImportAll method Updated External Libraries Fixes in Excel Exportation Modify ConnectionString refreshes the Properties Window correctlyUser Group Labs: User Group Data: 01.00.00: This release has the following updates and new features: Initial release with a minimal feature set Easy to use (just add to the social group details page) Edit common user group properties System Requirements DNN v07.00.02 or newer .Net Framework v4.0 or newerCarrotCake, an ASP.Net WebForms CMS: Binaries and PDFs - Zip Archive (v. 4.3 20130713): Product documentation and additional templates for this version is included in the zip archive, or if you want individual files, visit the http://www.carrotware.com website. Templates, in addition to those found in the download, can be downloaded individually from the website as well. If you are coming from earlier versions, make a precautionary backup of your existing website files and database. When installing the update, the database update engine will create the new schema items (if you...Dalmatian Build Script: Dalmatian Build 0.1.3.0: -Minor bug fixes -Added Choose<T> and ChooseYesNo to Console objectPushover.NET: Pushover.NET - Stable Release 10 July 2013: This is the first stable release of Pushover.NET. It includes 14 overloads of the SendNotification method, giving you total flexibility of sending Pushover notifications from your client. Assembly is built to .NET 2.x so it can be called from .NET 2.x, 3.x and 4.x projects. Also available is the Test Harness. This is a small GUI that you can use to test calls to Pushover.NET's main DLL. It's almost fully functional--the sound effects haven't been fully configured so no matter what you pick ...MCEBuddy 2.x: MCEBuddy 2.3.14: 2.3.14 BETA is available through the Early Access Program.Click here https://mcebuddy2x.codeplex.com/discussions/439439 for details and to get access to Early Access Program to download latest releases. Changelog for 2.3.14 (32bit and 64bit) NEW FEATURES: 1. ENHANCEMENTS: 2. Improved eMail notifications 3. Improved metrics details 4. Support for larger history (INI) file (about 45,000 sections, each section can have about 1500 entries) BUG FIXES: 5. Fix for extracting Movie release year from...Azure Depot: Flask: Flask Version 01New Projects(??:wwqgtxx-goagent)???goagent/??wallproxy???????????????: =*greatagent*(??:wwqgtxx-goagent)= = [downloads downloads??] = =[WhyMove ???????]= ==???goagent/??wallproxy???????????????,?????goagent?wallproxy??????????,??Azure Anonymous SAS URL Generator: The Azure Anonymous SAS URL Generator allows you to generate anonymous Shared Access Signature URLs for individual Blobs stored within a given storage containerBizTalk ESB Toolkit Enterprise Library machine.config Toggler: This tool provides an instant on/off switch for the enterpriseLibrary.ConfigurationSource changes that the BizTalk ESB Toolkit makes to machine.config.Common .NET Utilities: Just some common utilities I've developed over the years that are shared among my various projects.DIY Online System: To create a Philippine Standard Online Payroll SystemDynamics Ax CipherLib: The Dynamics Ax CipherLib is a simple X.509 certificate based cipher implementation that allows to encrypt/decrypt S/MIME or XML messages with Dynamics Ax 4.0,GpsBox: We wanted to create a device which is sending the current position and any user is able to look up the current position of it.Ingenious Framework: Ingenious Framework is an easy to use, lightweight framework that hides semantic web technologies from you as a developer, but harnesses its benefits.Lab Of Things: Lab of Things is a flexible platform for experimental research that uses connected devices in homes. Orchard Deployment: Deployment and replication of content between one or more Orchard CMS instances. Move content individually, using workflows or custom subscriptions.PluginManagement.Net: .NET Plugin Loader Framework using MEF(Microsoft Extensibility Framework). It has a generic loader which loads plugin that implements generic interface IPlugin.QlikView Management API in vb.net: For more info see: http://community.qlikview.com/docs/DOC-3647 a conversion from c# to vb.net Recover Deleted Emails Microsoft Exchange Server: Get an effective way to recover deleted emails from Exchange server and browse it with MS Outlook or MS Exchange server depending upon the users requirement.Shindo's Race System: Special Edition: Shindo's Race System: Special EditionSP Solution Builder: Simple summary of project will be added latertestfailure0716: testTFS Build Custom Activities: TFS Build Custom extensions offers you a list of TFS build activities and a WorkFlow to use them.Upida.net: If you use Asp.net MVC and any NHibernate, than Upida is for you. Upida favors knockout.js. You can download example code, implemented with knockout.js.

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  • Raid HDD Boot up

    - by user234695
    My server is Power Edge 1950 running server 2008 32Bit, using 3 Physical SAS HDD as a Virtual 2 Disk configured for RAID5, with partition of C drive as OS and D drive as Data. Planning to format and install Server 2008 R2 64Bit so I insert a New Physical disk and configured as RAID5 and clone the C drive and D drive to the new hard disk. Now I need to test that the new hard disk is able to boot windows and work as expected. How do I test, I am not able to boot the windows by choosing the new harddisk, the bios show only the existing HDD, not the new one. Also, if I remove the old three hard disk, and leave the new harddisk and then am I able to boot the device, if I do this does my existing RAID5 configuration and data on the hard disk still remain.

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  • ArchBeat Link-o-Rama for 11/22/2011

    - by Bob Rhubart
    A Brief Introduction on Migrating to an Oracle-based Cloud Environment | Tom Laszewski "Before you can start migrating to the cloud, you must define what the cloud means to you," says Tom Laszeski. "The cloud is not a specific software or hardware product; contrary to what many technology vendors would have you believe." Custom Exception Registration for ADF BC EO Attribute | Andrejus Baranovskis "Sometimes customers prefer to implement business logic validation completely in Java, without using ADF BC declarative/Groovy validation rules," says Oracle ACE Director Andrejus Baranovskis. "Thats fine, we can code business logic validation in ADF and implement different custom validation methods on VO/EO level." Oracle Exadata Virtual Conference - Jan 20 2012 The Exadata SIG, along with IOUG, is organizing the First Exadata Virtual Conference, to be held on January 20, 2012. Proposals for presentations are now being accepted. Smooth Sailing or Rough Waters: Navigating Policy Administration Modernization | Helen Pitts "It’s no surprise that fueling growth, both now and in the future, continues to be a key driver for modernization" says Helen Pitts. "Why? Inflexible, hard-coded, legacy systems require customization by IT every time a change is required." Architects putting on the Ritz; Info integration book learning; Platform for SAS Grid Computing This week on the Architect Home Page on OTN. Webcast: Introducing Oracle WebLogic Server 12c: Developer Deep Dive - Dec 1 - 11am PT / 2pm ET Learn how Oracle WebLogic Server 12c enables rapid development of modern, lightweight Java EE 6 applications. Discover how you can leverage the latest development technologies, tools and standards when deploying to Oracle WebLogic Server across both conventional and Cloud environments. Architecture all day. Oracle Technology Network Architect Day - Phoenix, AZ - Dec14. Free registration. When: December 14, 2011 Where: The Ritz-Carlton, Phoenix, 2401 East Camelback Road, Phoenix, AZ 85016 Registration is free, but seating is limited.

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  • Reduce the I/O priority of Windows Backup (Windows Server 2008 R2)

    - by HelloSam
    I have a PostgreSQL running on Windows Server 2008 R2 x64 box. And I have scheduled a backup everyday from the RAID 1 DB disk to a dedicated standalone disk. They are SAS 15k on Dell PERC 6i. I am using the built-in Windows Server Backup for purpose. The problem is, whenever the backup process is kicked in, the database performance is hogged. I would say almost a 10x of performance reduction. From the resource monitor, the disk queue is in the double digit range when backing up, and less than 1 during the day. The disk activity is like ~30-50MB/s during backup, so I guess the hardware is acting normally, though wbengine.exe takes up most of the portions. I think reduce the IO priority of the backup process would be an answer, but I couldn't find a way to. Tuning process CPU priority does not seems to help.

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  • ML 350 additional SATA RAID controller (mirror only)

    - by Nicholas
    I have a Proliant ML350 G8 with two SAS raid arrays currently set up - thereby maxing the default P420i raid controller. I need to set up a large video dump space in addition to this existing set-up (for non backed up, non-critical, temporary storage). I had planned to just add a 2TB SATA disk and plug it into the motherboard. However I it occurred to me the motherboard might have built-in mirror RAID support? Therefore I could use two SATA disks and have some semblance of redundancy. Is this possible? Or would I need to get a cheap raid card? Any recommendations?

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  • What could cause my LAN Pings be greater than 100ms?

    - by James Holland
    I have 2 servers (Both: Windows Server 2008, Dual Xeon 2.8Ghz, 32GB RAM, 8 x 15k SAS Drives). One of them is a DC / Web server / Exchange Server, the other is a SQL Server (2008). I have a 48 port Netgear GS748T Gigabit switch. When I ping from server to server, I get ping times <1ms, great, but when I ping from a PC, I get varying pings from the occasional <1ms to 500ms!! If I log into either server and look at Task Manager, CPU usage peaks at 20%, memory usage is 100%, but I am led to believe this is normal as Exchange will just use as much as you have, and release it when requested. Network usage peaks at 1%. I really don't understand how the ping can vary that much. I know I am giving very little info, but this is all I know, I apologise, but can anyone help? In response to question, I have pinged by both IP address and hostname, no difference in ping times.

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  • Rough estimate for speed advantage of SAN-via-fibre to san-via-iSCSI when using VMware vSphere

    - by Dirk Paessler
    We are in the process of setting up two virtualization servers (DELL R710, Dual Quadcore Xeon CPUs at 2.3 Ghz, 48 GB RAM) for VMware VSphere with storage on a SAN (DELL Powervault MD3000i, 10x 500 GB SAS drives, RAID 5) which will be attached via iSCSI on a Gbit Ethernet Switch (DELL Powerconnect 5424, they call it "iSCSI-optimized"). Can anyone give an estimate how much faster a fiber channel based solution would be (or better "feel")? I don't mean the nominal speed advantage, I mean how much faster will virtual machines effectively work? Are we talking twice the speed, five times, 10 times faster? Does it justify the price? PS: We are not talking about heavily used database servers or exchange servers. Most of the virtualized servers run below 3-5% average CPU load.

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  • Strange Inode/Ram cache drops happening in CentOS

    - by FunkyChicken
    I run a CentOS 5.7 machine (64bit) with 24GB ram and 4x SAS drives in RAID10 setup. This machine runs nginx/1.0.10, php-fpm & xcache. About a month back the RAM usage of this machine has changed. About every few hours the 'CACHE' is flushed from the RAM, this happens exactly when the 'Inode table usage' drops. I'm pretty sure these drops are related. (see the 2 attached images). This server hosts quite a lot of small files (20M all a few KB big). Not many files are deleted (maybe 100 per hour (total size a few MB max)), not enough to account for the huge Inode table drops. I also have no crons running which could cause these drops. Sar -r output: http://pastebin.com/C4D0B79i My question: Why are these huge RAM/Inode usage drops happening? How can I get Nginx/PHP to use all of my servers RAM?

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  • What is this Cable for? 4 Pin to 2 Pin from Riser to Perc in Dell R410

    - by Kyle Brandt
    I got a new raid card for a R410 server since the S300 that came with it doesn't support raid with Linux (No work around for this if SAS from what I could find). Anyways, the RAID card has 2 pins on it and there is a cable that that connects to a 4 pin connection on the riser. The cable only has two wires, one black and one red. What is this cable for? My guess would be maybe LED status for the front panel or something like that, but I am just guessing....

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  • Will this increase my VPS failing rate ?

    - by Spencer Lim
    Will this increase my Virtual private Server failing rate if i :- install Microsoft Window Server 2008 Enterprise install SQL server enterprise 2008 install IIS 7.5 install ASP.Net Mvc 2 install Microsoft Exchange install Team foundation server on one mini VPS with specification of DELL Poweredge R710 shared plan DDR3 ECC RAMs 16GB and -- 1GB for this VPS using DELL PERC 6i raid controller (this thing alone about 1.5k-2k) and the SAS HDD (15K RPM) (146GB) -- 33GB to this VPS each hdd is freaking fast over 300MB read / write possible with proper tuning the motherboard is a DELL and it has twin redundant PSU (870watt 85%eff) its running on Intel Xeon 5502 (Quad Core) x2 so about 8 physical proc (fairly share) is there any ruler for this about one VPS can only install what what what service ? Thx for reply

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  • Can I use dmraid instead of md (mdadm) to make software RAID-1 and RAID-1+0 volumes?

    - by Don MacAskill
    On a related question about SSDs and TRIM (see: Possible to get SSD TRIM (discard) working on ext4 + LVM + software RAID in Linux? ), it turns out that dmraid may now (or shortly) support TRIM on RAID-1. Typically, we've used md (via mdadm) to create our RAID-1 volumes, then used LVM to create volume groups, then formatted with the file system of our choice (ext4 lately). We've been doing this for years, and Google & ServerFault searches seem to confirm this is the most common way of doing software RAID with volume management. Google searches seem to suggest that dmraid is use for so-called 'fakeRAID' configurations where there's some level of hardware 'help' in the form of RAID BIOS in the controller, which we don't have (and don't want to use - we'd like a fully software solution). Since we'd like to use TRIM on our SSDs, and since md doesn't seem to (yet?) support TRIM, I'm wondering if it's possible to use dmraid instead of md to create RAID-1 (and RAID-1+0) volumes in software, with no hardware support (ie, just plugged into a dumb SATA/SAS bus)?

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  • Using a non-validated SED on a Dell R720

    - by a coder
    We were given a Dell R720 a couple years ago, and the machine currently has standard 300GB 3.5" SAS 15k drives. Our RAID controller is a Perc H710. We need to update our disks to FIPS 140-2 certified SED. According to Dell, they have only one tested/validated FIPS SED for this machine/controller, but it is a 7200rpm 3.5" unit. I'm showing that Dell offers a 600GB 15k FIPS SED in 3.5" configuration (Dell part number 342-0605), but they say they haven't validated or tested to know if it works. They informed us that we would not void our warranty in using this non-validated drive. How likely is it that our R720 with H710 controller will work with the non-validated drive? Are there significant differences in how drive manufacturers build SED that would prevent them from working consistently across different controllers?

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  • VMWare esxi 4.1 storage errors with MD3200

    - by Karl Katzke
    We're seeing some storage errors from the esxi logs relating to our MD3200. I'm sort of a VMWare noob and am not sure where to go from here because I couldn't find a lot of documentation on the VMWare website, and the forums didn't seem to have any posts about it with actual answers. Everything is working, but I'm trying to proactively troubleshoot this. sfcb-vmware_base|StoragePool Cannot get logical disk data from controller 0 sfcb-vmware_base|Volume Cannot get logical disk data from controller 0 sfcb-vmware_base|storelib-GetLDList-ProcessLibCommandCall failed; rval = 0x800E The ESXi boxes are connected directly via SAS to the controller on the MD3200. What do these errors actually mean, and what's a good path to start troubleshooting or solving them?

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