Re: Large tables (was: RAID 0 not as fast as expected)

From: "Alex Turner" <armtuk(at)gmail(dot)com>
To: "Luke Lonergan" <llonergan(at)greenplum(dot)com>
Cc: "Bucky Jordan" <bjordan(at)lumeta(dot)com>, "Merlin Moncure" <mmoncure(at)gmail(dot)com>, pgsql-performance(at)postgresql(dot)org
Subject: Re: Large tables (was: RAID 0 not as fast as expected)
Date: 2006-09-19 03:40:16
Message-ID: 33c6269f0609182040m28ac1e0ei34f617957ac3227a@mail.gmail.com
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Sweet - thats good - RAID 10 support seems like an odd thing to leave out.

Alex

On 9/18/06, Luke Lonergan <llonergan(at)greenplum(dot)com> wrote:
>
> Alex,
>
> On 9/18/06 4:14 PM, "Alex Turner" <armtuk(at)gmail(dot)com> wrote:
>
> > Be warned, the tech specs page:
> > http://www.sun.com/servers/x64/x4500/specs.xml#anchor3
> > doesn't mention RAID 10 as a possible, and this is probably what most
> would
> > recommend for fast data access if you are doing both read and write
> > operations. If you are doing mostly Read, then RAID 5 is passable, but
> it's
> > redundancy with large numbers of drives is not so great.
>
> RAID10 works great on the X4500 ­ we get 1.6GB/s + per X4500 using RAID10
> in
> ZFS. We worked with the Sun Solaris kernel team to make that happen and
> the
> patches are part of Solaris 10 Update 3 due out in November.
>
> - Luke
>
>
>

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