From: Jim C. Nasby <jnasby@pervasive.com>
To: pgsql-performance@postgresql.org
Subject: Re: Performance with 2 AMD/Opteron 2.6Ghz and 8gig
Date: Wed, 9 Aug 2006 16:09:04 -0500
Message-ID: <20060809210903.GS40481@pervasive.com> (raw)
In-Reply-To: <20060807202002.GA7380@uio.no>
References: <7F10D26ECFA1FB458B89C5B4B0D72C2B4E4D9B@sesrv12.wirelesscar.com>
<Pine.OSX.4.61.0607290153401.10025@white.nat.fasttrackmonkey.com>
<44D72D11.7050203@logix-tt.com>
<33c6269f0608071302h6429cfcn71074709c5cd53ff@mail.gmail.com>
<20060807202002.GA7380@uio.no>
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@pervasive.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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To: pgsql-performance@postgresql.org
Cc: jnasby@pervasive.com
Subject: Re: Performance with 2 AMD/Opteron 2.6Ghz and 8gig
In-Reply-To: <20060809210903.GS40481@pervasive.com>
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