| From: | Jim Nasby <decibel(at)decibel(dot)org> |
|---|---|
| To: | Paweł Gruszczyński <pawel(dot)gruszczynski(at)inea(dot)com(dot)pl> |
| Cc: | pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: What`s wrong with JFS configuration? |
| Date: | 2007-04-25 17:40:09 |
| Message-ID: | 58A76D12-7105-4342-8513-E445736B3631@decibel.org |
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| Thread: | |
| Lists: | 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(at)nasby(dot)net
EnterpriseDB http://enterprisedb.com 512.569.9461 (cell)
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