From: Joshua D. Drake <jd@commandprompt.com>
To: Jeff Frost <jeff@frostconsultingllc.com>
Cc: Bucky Jordan <bjordan@lumeta.com>
Cc: Luke Lonergan <llonergan@greenplum.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: availability of SATA vendors
Date: Wed, 22 Nov 2006 09:09:50 -0800
Message-ID: <1164215390.2868.26.camel@localhost.localdomain> (raw)
In-Reply-To: <Pine.LNX.4.64.0611220901210.4382@discord.home.frostconsultingllc.com>
References: <78ED28FACE63744386D68D8A9D1CF5D420A080@MAIL.corp.lumeta.com>
<Pine.LNX.4.64.0611220834400.4382@discord.home.frostconsultingllc.com>
<1164214816.2868.18.camel@localhost.localdomain>
<Pine.LNX.4.64.0611220901210.4382@discord.home.frostconsultingllc.com>
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 :)
Sincerely,
Joshua D. Drake
>
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To: pgsql-performance@postgresql.org
Cc: jd@commandprompt.com, jeff@frostconsultingllc.com, bjordan@lumeta.com, llonergan@greenplum.com
Subject: Re: availability of SATA vendors
In-Reply-To: <1164215390.2868.26.camel@localhost.localdomain>
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