From: | "Joshua D(dot) Drake" <jd(at)commandprompt(dot)com> |
---|---|
To: | Mark Kirkwood <markir(at)paradise(dot)net(dot)nz> |
Cc: | Steve Crawford <scrawford(at)pinpointresearch(dot)com>, pgsql-general(at)postgresql(dot)org |
Subject: | Re: Recomended FS |
Date: | 2003-10-21 17:38:59 |
Message-ID: | 3F956F33.8050307@commandprompt.com |
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Thread: | |
Lists: | pgsql-general |
Hello,
Actually if you were to get off that Promise controller and on to a
3Ware or other "real" hardware RAID... you would probably
see even better performance.
Sincerely,
Joshua Drake
Mark Kirkwood wrote:
> Some sort of ATA Raid is probably worth considering -
>
> e.g. I am experimenting with a system using 2 ATA-66 Seagates + 1
> Promise TX2000
>
> The disks themselves give fairly poor performance when attached to the
> std IDE channels :
>
> sequential write 15Mb/s
> sequential read 20Mb/s
>
> But attached to the Promise card using RAID 0 do considerably better:
>
> sequential write 52Mb/s
> sequential read 52MB/s
>
> Now you would probably not use RAID 0 for a "real" system (unless you
> had good backups), but the difference is interesting
>
> Note that even including the card, this is a very cheap setup.
>
> (I have not gotten around to testing random read and writes, but if
> anybody is interested I can test this and supply figures)
>
> regards
>
> Mark
>
>
> Steve Crawford wrote:
>
>>
>>
>> Talk about timing...this article posted today seems quite apropos
>> (spoiler: SCSI beats IDE):
>>
>> http://hardware.devchannel.org/hardwarechannel/03/10/20/1953249.shtml?tid=20&tid=38&tid=49
>>
>>
>>
>>
>>
>
>
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