Messages in this thread | | | Date | Tue, 10 Dec 2002 16:34:42 +0100 | From | Jakob Oestergaard <> | Subject | Re: RAID5 chunksize? |
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On Tue, Dec 10, 2002 at 10:23:30AM -0500, Robert L. Harris wrote: > > > Ok, say I'm building a 4 disk raid5 array. Performance is going to be > critical as this system is going to be very IO intensive. We had to go > RAID5 though due to filesystem requirements. > > According to the manufacturer the disks have: > > 8Meg DataBuffer > 10K RPM Rotational speed > SCSI Ultra 160 > > (Drive is: > http://www.fel.fujitsu.com/home/product.asp?L=en&PID=248&INFO=fsp) > > What is the ideal Chunksize?
Measure.
Try 4k, 32k, 128k, and see which is best.
Please post the results to the list :)
It is important that you benchmark not with tiotest or bonnie, but with the actual applications that need to use this server.
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