From: Luke Lonergan <llonergan@greenplum.com>
To: Peter Childs <peterachilds@gmail.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: setting up raid10 with more than 4 drives
Date: Wed, 30 May 2007 07:06:54 -0700
Message-ID: <C282D30E.31B69%llonergan@greenplum.com> (raw)
In-Reply-To: <a2de01dd0705300029t52ceb76fx25c3ad67db0c43c0@mail.gmail.com>
Hi Peter,
On 5/30/07 12:29 AM, "Peter Childs" <peterachilds@gmail.com> wrote:
> Good point, also if you had Raid 1 with 3 drives with some bit errors at least
> you can take a vote on whats right. Where as if you only have 2 and they
> disagree how do you know which is right other than pick one and hope... But
> whatever it will be slower to keep in sync on a heavy write system.
Much better to get a RAID system that checksums blocks so that "good" is
known. Solaris ZFS does that, as do high end systems from EMC and HDS.
- Luke
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To: pgsql-performance@postgresql.org
Cc: llonergan@greenplum.com, peterachilds@gmail.com
Subject: Re: setting up raid10 with more than 4 drives
In-Reply-To: <C282D30E.31B69%llonergan@greenplum.com>
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