Re: [CentOS] Benchmark Disk IO

*Try dbench.* * * * http://publib.boulder.ibm.com/infocenter/lnxinfo/v3r0m0/index.jsp?topic=/liaag/journalingfilesystem/publicjournal12.htm * * * * OR* * * *http://linuxhelp.150m

Re: [CentOS] Benchmark Disk IO

On 05/19/2010 06:14 AM, John Doe wrote: > From: Matt Keating > >>> I don't usually use iozone (I usually use bonnie++) so take this with >>> a grain of salt, but those speed look suspiciously like cache speeds. >>> Bump the size (-s parameter) up to twice your real RAM size. >>> >> Will

Re: [CentOS] Benchmark Disk IO

From: Matt Keating >> I don't usually use iozone (I usually use bonnie++) so take this with >> a grain of salt, but those speed look suspiciously like cache speeds. >> Bump the size (-s parameter) up to twice your real RAM size. > Will give that a try - 16gb file incoming Or maybe do a: sync

Re: [CentOS] Benchmark Disk IO

> I don't usually use iozone (I usually use bonnie++) so take this with a > grain of salt, but those speed look suspiciously like cache speeds. Bump > the size (-s parameter) up to twice your real RAM size. > > -- > Benjamin Franz > ___ > CentOS mailing l

Re: [CentOS] Benchmark Disk IO

On 05/19/2010 02:44 AM, Matt Keating wrote: > 2010/5/6 Matt Keating: > >> Thanks for all the updates. Will look into iozone and the advice given >> about the rest. >> > Either I'm doing/reading something wrong or a 1TB SATA 7200 RPM drive > is faster than 4x300GB SCSI 10K RPM drives in ra

Re: [CentOS] Benchmark Disk IO

2010/5/6 Matt Keating : > Thanks for all the updates. Will look into iozone and the advice given > about the rest. Either I'm doing/reading something wrong or a 1TB SATA 7200 RPM drive is faster than 4x300GB SCSI 10K RPM drives in raid 10. Both of the results below were from iozone, running the fo

Re: [CentOS] Benchmark Disk IO

Les Mikesell wrote: > On 5/5/2010 12:00 PM, Karanbir Singh wrote: >>> Try to run the same IO operations as your production server is running. >>> Bonnie++ could be good application for benchmarking. Also run some >>> parallel rsync, rm, find, etc proccesses. >>> >> I am with John Pierce on this one

Re: [CentOS] Benchmark Disk IO

There is a dd test that floats around the PostgreSQL lists, so I wrote this simple script to automate it - use at your own risk! #!/bin/bash # do something which parses command line parameters DEFAULT_BLOCK=8 DEFAULT_PATH=/data/tmp DEFAULT_FILE=ddfile helpme() { echo "Usage: $0 [RAM=x]

Re: [CentOS] Benchmark Disk IO

Sorry for the top post - clicked send before looking ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos

Re: [CentOS] Benchmark Disk IO

Thanks for all the updates. Will look into iozone and the advice given about the rest. 2010/5/6 : > On Thu, May 06, 2010 at 12:56:55AM -0700, John R Pierce wrote: >> przemol...@poczta.fm wrote: >> > The above numbers are true if we have random (!) IO pattern. >> > In case of sequential (!) IO eve

Re: [CentOS] Benchmark Disk IO

On Thu, May 06, 2010 at 12:56:55AM -0700, John R Pierce wrote: > przemol...@poczta.fm wrote: > > The above numbers are true if we have random (!) IO pattern. > > In case of sequential (!) IO even SATA disks can deliver much, much higher > > numbers. > > > > > sequential IO is remarkably rare

Re: [CentOS] Benchmark Disk IO

2010/5/6 John R Pierce > ??? wrote: > > Use a simple test: > > time dd if=/dev/zero of=/tmp/test-hd bs=1M count=1000 > > sequential cached writes, yeah, thats useful. *not* > > This is one of the steps. You can use sysbench random read and random write for multi-thirds. > _

Re: [CentOS] Benchmark Disk IO

przemol...@poczta.fm wrote: > The above numbers are true if we have random (!) IO pattern. > In case of sequential (!) IO even SATA disks can deliver much, much higher > numbers. > sequential IO is remarkably rare in a typical server environment anyways, the IOPS numbers on sequential operat

Re: [CentOS] Benchmark Disk IO

??? wrote: > Use a simple test: > time dd if=/dev/zero of=/tmp/test-hd bs=1M count=1000 sequential cached writes, yeah, thats useful. *not* ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos

Re: [CentOS] Benchmark Disk IO

On Wed, May 05, 2010 at 09:47:19AM -0700, nate wrote: > Matt Keating wrote: > > What is the best way to benchmark disk IO? > > > > I'm looking to move one of my servers, which is rather IO intense. But > > not without first benchmarking the current and new disk array, To make > > sure this isn't a

Re: [CentOS] Benchmark Disk IO

Hi! Use a simple test: time dd if=/dev/zero of=/tmp/test-hd bs=1M count=1000 Sysbench: http://sysbench.sourceforge.net/docs/#fileio_mode And this: http://assets.en.oreilly.com/1/event/27/Linux%20Filesystem%20Performance%20for%20Databases%20Presentation.pdf 2010/5/5 Matt Keating > What is the

Re: [CentOS] Benchmark Disk IO

On May 5, 2010, at 1:13 PM, Les Mikesell wrote: > On 5/5/2010 12:00 PM, Karanbir Singh wrote: >> >>> Try to run the same IO operations as your production server is >>> running. >>> Bonnie++ could be good application for benchmarking. Also run some >>> parallel rsync, rm, find, etc proccesses. >

Re: [CentOS] Benchmark Disk IO

On 5/5/2010 12:00 PM, Karanbir Singh wrote: > >> Try to run the same IO operations as your production server is running. >> Bonnie++ could be good application for benchmarking. Also run some >> parallel rsync, rm, find, etc proccesses. >> > > I am with John Pierce on this one, role and app will dic

Re: [CentOS] Benchmark Disk IO

On 05/05/2010 05:55 PM, Dominik Zyla wrote: > Try to run the same IO operations as your production server is running. > Bonnie++ could be good application for benchmarking. Also run some > parallel rsync, rm, find, etc proccesses. > I am with John Pierce on this one, role and app will dictate benc

Re: [CentOS] Benchmark Disk IO

On Wed, May 05, 2010 at 05:17:53PM +0100, Matt Keating wrote: > What is the best way to benchmark disk IO? > > I'm looking to move one of my servers, which is rather IO intense. But > not without first benchmarking the current and new disk array, To make > sure this isn't a full waste of time. Tr

Re: [CentOS] Benchmark Disk IO

Matt Keating wrote: > What is the best way to benchmark disk IO? > > I'm looking to move one of my servers, which is rather IO intense. But > not without first benchmarking the current and new disk array, To make > sure this isn't a full waste of time. You can do a pretty easy calculation based on

Re: [CentOS] Benchmark Disk IO

Matt Keating wrote: > What is the best way to benchmark disk IO? > > I'm looking to move one of my servers, which is rather IO intense. But > not without first benchmarking the current and new disk array, To make > sure this isn't a full waste of time. > synthetic benchmarks only tell you what