| From: | Mark Kirkwood <markir(at)paradise(dot)net(dot)nz> |
|---|---|
| To: | greg(at)tcscs(dot)com |
| Cc: | 'Mark Wong' <markwkm(at)gmail(dot)com>, david(at)lang(dot)hm, pgsql-performance(at)postgresql(dot)org, 'Gabrielle Roth' <gorthx(at)gmail(dot)com> |
| Subject: | Re: file system and raid performance |
| Date: | 2008-08-07 09:40:00 |
| Message-ID: | 489AC2F0.9050907@paradise.net.nz |
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| Lists: | pgsql-performance |
Mark Kirkwood wrote:
> You are right, it does (I may be recalling performance from my other
> machine that has a 3Ware card - this was a couple of years ago...)
> Anyway, I'm thinking for the Hardware raid tests they may need to be
> specified.
>
>
FWIW - of course this somewhat academic given that the single disk xfs
test failed! I'm puzzled - having a Gentoo system of similar
configuration (2.6.25-gentoo-r6) and running the fio tests a little
modified for my config (2 cpu PIII 2G RAM with 4x ATA disks RAID0 and
all xfs filesystems - I changed sizes of files to 4G and no. processes
to 4) all tests that failed on Marks HP work on my Supermicro P2TDER +
Promise TX4000. In fact the performance is pretty reasonable on the old
girl as well (seq read is 142Mb/s and the random read/write is 12.7/12.0
Mb/s).
I certainly would like to see some more info on why the xfs tests were
failing - as on most systems I've encountered xfs is a great performer.
regards
Mark
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