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Re: availability of SATA vendors

From: "Joshua D(dot) Drake" <jd(at)commandprompt(dot)com>
To: Jeff Frost <jeff(at)frostconsultingllc(dot)com>
Cc: Bucky Jordan <bjordan(at)lumeta(dot)com>, Luke Lonergan <llonergan(at)greenplum(dot)com>, pgsql-performance(at)postgresql(dot)org
Subject: Re: availability of SATA vendors
Date: 2006-11-22 17:09:50
Message-ID: 1164215390.2868.26.camel@localhost.localdomain (view raw, whole thread or download thread mbox)
Lists: pgsql-performance
On Wed, 2006-11-22 at 09:02 -0800, Jeff Frost wrote:
> On Wed, 22 Nov 2006, Joshua D. Drake wrote:
> >> I could only find the 6 disk RAID5 numbers in the archives that were run with
> >> bonnie++1.03.  Have you run the RAID10 tests since?  Did you settle on 6 disk
> >> RAID5 or 2xRAID1 + 4XRAID10?
> >
> > Why not 6 drive raid 10? IIRC you need 4 to start RAID 10 but only pairs
> > after that.
> A valid question.  Does the caching raid controller negate the desire to 
> separate pg_xlog from PGDATA?

There is a point where the seperate pg_xlog does not help with RAID 10.
Where that point is, entirely depends on your database usage :)


Joshua D. Drake


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