| From: | Michelle Konzack <linux4michelle(at)freenet(dot)de> |
|---|---|
| To: | pgsql-general(at)postgresql(dot)org |
| Subject: | Re: [OT] RAID controllers blocking one another? |
| Date: | 2008-01-18 23:45:46 |
| Message-ID: | 20080118234546.GK2804@freenet.de |
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| Lists: | pgsql-general |
Am 2008-01-18 16:54:17, schrieb Hannes Dorbath:
> Sean Davis wrote:
> >150-200MB/s writing and somewhat faster for reading
>
> That actually seems dead slow. Whatever RAID level you configured, there
> is no sane way for it to be that slow. Is this a RAID 5/6 array? Did you
> forgot to align your file system to stripe boundaries?
I have had such rates on a 3w85xx with 4+1 WD Raptor WD740 in Raid-5
(the OS was on a Raid-1 with 2+1 WD360)
The 3w95xx shoud do more, but with the new Hitachi 1 TByte I do not
get more then 140 MBit. It seems, the drives are not so performant.
Thanks, Greetings and nice Day
Michelle Konzack
Systemadministrator
Tamay Dogan Network
Debian GNU/Linux Consultant
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