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

[CentOS] Benchmark Disk IO

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. thanks ___ CentOS mailing list