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

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Message-Id: <200803121029.54108.phillips@phunq.net>
Date:	Wed, 12 Mar 2008 09:29:53 -0800
From:	Daniel Phillips <phillips@...nq.net>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [ANNOUNCE] Ramback: faster than a speeding bullet

On Wednesday 12 March 2008 06:11, Alan Cox wrote:
> > > Ext3 is only going to help you if the ramdisk writeback respects barriers
> > > and ordering rules ?
> > 
> > I was alluding to to e2fsck's amazing repair ability, not ext3's journal.
> 
> Oh you mean "pray hard". e2fsck works well with typical disk style
> failures, it is not robust against random chunks vanishing. I know this
> as I've worked on and debugged a case where a raid card rebooted silently
> and threw out the write back cache.

So then you know that people already rely on batteries in critical storage
applications.  So I do not understand why all the FUD from you.

Particularly about Ext2/Ext3, which does recover well from random damage.
My experience.

> > Your comment re fs chunk size reveals that I have failed to
> > communicate the most basic principle of the ramback design: the
> > backing store is not expected to represent a consistent filesystem
> 
> No I get that. You've ignored the fact I'm suggesting that design choice
> is dumb.

You seem to be calling Linux unreliable.

Daniel
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