From: Florian Weimer <fweimer@bfk.de>
To: Brian Wipf <brian@clickspace.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: File Systems Compared
Date: Wed, 06 Dec 2006 17:44:23 +0100
Message-ID: <82bqmh3rfc.fsf@mid.bfk.de> (raw)
In-Reply-To: <BEB285F8-0BD2-4524-BD46-B1D35E7EFBEB@clickspace.com>
References: <BEB285F8-0BD2-4524-BD46-B1D35E7EFBEB@clickspace.com>
* Brian Wipf:
> Anyone run their RAIDs with disk caches enabled, or is this akin to
> having fsync off?
If your cache is backed by a battery, enabling write cache shouldn't
be a problem. You can check if the whole thing is working well by
running this test script: <http://brad.livejournal.com/2116715.html;
Enabling write cache leads to various degrees of data corruption in
case of a power outage (possibly including file system corruption
requiring manual recover).
--
Florian Weimer <fweimer@bfk.de>
BFK edv-consulting GmbH http://www.bfk.de/
Kriegsstraße 100 tel: +49-721-96201-1
D-76133 Karlsruhe fax: +49-721-96201-99
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To: pgsql-performance@postgresql.org
Cc: fweimer@bfk.de, brian@clickspace.com
Subject: Re: File Systems Compared
In-Reply-To: <82bqmh3rfc.fsf@mid.bfk.de>
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