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List:       pgsql-performance
Subject:    Re: [PERFORM] file system and raid performance
From:       Mario Weilguni <mweilguni () sime ! com>
Date:       2008-08-07 10:21:04
Message-ID: 489ACC90.9030401 () sime ! com
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Mark Kirkwood schrieb:
> 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
>
I can second this, we use XFS on nearly all our database servers, and 
never encountered the problems mentioned.


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