linux-kernel - Re: [ANNOUNCE] Ramback: faster than a speeding bullet

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Date:	Thu, 13 Mar 2008 13:22:11 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Daniel Phillips <phillips@...nq.net>
Cc:	David Newall <davidn@...idnewall.com>, linux-kernel@...r.kernel.org
Subject: Re: [ANNOUNCE] Ramback: faster than a speeding bullet

On Wed, 12 Mar 2008 22:14:16 -0800
Daniel Phillips <phillips@...nq.net> wrote:

> On Wednesday 12 March 2008 22:39, David Newall wrote:
> > Daniel Phillips wrote:
> > > Particularly about Ext2/Ext3, which does recover well from random damage.
> > > My experience.
> > 
> > By "recover well", you must mean "loses massive swabs of data, leaving
> > the system unbootable and with enormous numbers of user files missing." 
> > My experience.
> > 
> > Expecting fsck to cover for missed writes is stupid.
> 
> Whatever it can get off the disk it gets.  It does a good job.  If you
> don't think so, then don't tell me, tell Ted.

He knows. Ext3 cannot recover well from massive loss of intermediate
writes. It isn't a normal failure mode and there isn't sufficient fs
metadata robustness for this. A log structured backing store would deal
with that but all you apparently want to do is scream FUD at anyone who
doesn't agree with you.

Alan
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