Re: Disk hardware caching, performance, and journalling

["Kevin P. Fleming" <kevin@labsysgrp.com>]

I think if you have a large mail server and zero power protection, you've
got much larger problems to worry about than write-behind caching on your
disk drives... my servers have never (in my memory) experienced a
catastrophic power failure, because they're too easy to avoid.

----- Original Message -----
From: "Chris Wedgwood" <cw@f00f.org>
To: "Mark Hahn" <hahn@physics.mcmaster.ca>
Cc: <linux-kernel@vger.kernel.org>
Sent: Sunday, November 25, 2001 2:23 AM
Subject: Re: Disk hardware caching, performance, and journalling


> On Sat, Nov 24, 2001 at 02:39:44PM -0500, Mark Hahn wrote:
>
>     why does everyone get freaked out about disk caches?  afaikt,
>     there's only an O(50ms) window at each catastrophic power failure:
>     trivial for any reasonable rate of failures...
>
> If your disks are busy all the time (eg. a large mail server) then you
> will trivially hit this and it will be a problem.
>
>
>
>   --cw
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