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From: Michael Stone <mstone+postgres@mathom.us>
To: pgsql-performance@postgresql.org
Subject: Re: improving write performance for logging
Date: Fri, 06 Jan 2006 11:03:12 -0500
Message-ID: <20060106160311.GH32630@mathom.us> (raw)
In-Reply-To: <1136556006.31602.5.camel@spectre.intellivid.com>
References: <43BB0C5C.8020207@computer.org>
	<1136382865.24450.7.camel@spectre.intellivid.com>
	<7.0.1.0.2.20060104092139.01c37da0@earthlink.net>
	<1136390438.24450.49.camel@spectre.intellivid.com>
	<20060106010822.GK43311@pervasive.com>
	<1136556006.31602.5.camel@spectre.intellivid.com>

On Fri, Jan 06, 2006 at 09:00:06AM -0500, Ian Westmacott wrote:
>We use RAID50 instead of RAID0 for the tables for some fault-tolerance.
>We use RAID0 for the WAL for performance.
>
>I'm missing the implication of the question...

If you have the WAL on RAID 0 you have no fault tolerance, regardless of
what level you use for the tables.

Mike Stone

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