Date: Wed, 6 Aug 2003 14:19:05 -0700
From: Andrew Morton <akpm@osdl.org>
To: Mike Fedyk <mfedyk@matchmail.com>
Cc: diegocg@teleline.es, reiser@namesys.com, linux-kernel@vger.kernel.org,
       reiserfs-list@namesys.com
Subject: Re: Filesystem Tests
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Mike Fedyk <mfedyk@matchmail.com> wrote:
>
> On Wed, Aug 06, 2003 at 06:34:10PM +0200, Diego Calleja Garc?a wrote:
>  > El Wed, 06 Aug 2003 18:06:37 +0400 Hans Reiser <reiser@namesys.com> escribi?:
>  > 
>  > > I don't think ext2 is a serious option for servers of the sort that 
>  > > Linux specializes in, which is probably why he didn't measure it.
>  > 
>  > Why?
> 
>  Because if you have a power outage, or a crash, you have to run the
>  filesystem check tools on it or risk damaging it further.
> 
>  Journaled filesystems have a much smaller chance of having problems after a
>  crash.

Journalled filesytems have a runtime cost, and you're paying that all the
time.

If you're going 200 days between crashes on a disk-intensive box then using
a journalling fs to save 30 minutes at reboot time just doesn't stack up:
you've lost much, much more time than that across the 200 days.

It all depends on what the machine is doing and what your max downtime
requirements are.
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