Postgres Pro
Downloads
Home   >   mailing lists

Re: File Systems Compared - Mailing list pgsql-performance

From Florian Weimer
Subject Re: File Systems Compared
Date
Msg-id 82bqmh3rfc.fsf@mid.bfk.de
Whole thread Raw
In response to File Systems Compared  (Brian Wipf <brian@clickspace.com>)
Responses Re: File Systems Compared  (Mark Lewis <mark.lewis@mir3.com>)
List pgsql-performance
Tree view 
* 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

pgsql-performance by date:

Previous
From: "Steinar H. Gunderson"
Date:
Subject: Re: File Systems Compared
Next
From: Mark Lewis
Date:
Subject: Re: File Systems Compared