Re: What`s wrong with JFS configuration? - Mailing list pgsql-performance

From Jim Nasby
Subject Re: What`s wrong with JFS configuration?
Date
Msg-id 58A76D12-7105-4342-8513-E445736B3631@decibel.org
Whole thread Raw
In response to What`s wrong with JFS configuration?  (Paweł Gruszczyński <pawel.gruszczynski@inea.com.pl>)
Responses Re: What`s wrong with JFS configuration?  (Cosimo Streppone <cosimo@streppone.it>)
List pgsql-performance
On Apr 25, 2007, at 8:51 AM, Paweł Gruszczyński wrote:
> where u6 stores Fedora Core 6 operating system, and u0 stores 3
> partitions with ext2, ext3 and jfs filesystem.

Keep in mind that drives have a faster data transfer rate at the
outer-edge than they do at the inner edge, so if you've got all 3
filesystems sitting on that array at the same time it's not a fair
test. I heard numbers on the impact of this a *long* time ago and I
think it was in the 10% range, but I could be remembering wrong.

You'll need to drop each filesystem and create the next one to get a
fair comparison.
--
Jim Nasby                                            jim@nasby.net
EnterpriseDB      http://enterprisedb.com      512.569.9461 (cell)



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