| From: | "Jim C(dot) Nasby" <jnasby(at)pervasive(dot)com> |
|---|---|
| To: | pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: Performance with 2 AMD/Opteron 2.6Ghz and 8gig |
| Date: | 2006-08-09 21:09:04 |
| Message-ID: | 20060809210903.GS40481@pervasive.com |
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| Lists: | pgsql-performance |
On Mon, Aug 07, 2006 at 10:20:02PM +0200, Steinar H. Gunderson wrote:
> On Mon, Aug 07, 2006 at 04:02:52PM -0400, Alex Turner wrote:
> > Although I for one have yet to see a controller that actualy does this (I
> > believe software RAID on linux doesn't either).
>
> Linux' software RAID does. See earlier threads for demonstrations.
The real question: will it balance within a single thread?
Cheaper raid setups will balance individual requests between devices,
but good ones should be able to service a single request from both
devices (assuming it's reading more than whatever the stripe size is).
--
Jim C. Nasby, Sr. Engineering Consultant jnasby(at)pervasive(dot)com
Pervasive Software http://pervasive.com work: 512-231-6117
vcard: http://jim.nasby.net/pervasive.vcf cell: 512-569-9461
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