linux-kernel - Re: [ANNOUNCE] DualFS: File System with Meta-data and Data Separation

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Message-ID: <20070217151108.GA301@lazybastard.org>
Date:	Sat, 17 Feb 2007 15:11:08 +0000
From:	Jörn Engel <joern@...ybastard.org>
To:	Bill Davidsen <davidsen@....com>
Cc:	Juan Piernas Canovas <piernas@...ec.um.es>,
	Jan Engelhardt <jengelh@...ux01.gwdg.de>,
	sfaibish <sfaibish@....com>,
	kernel list <linux-kernel@...r.kernel.org>
Subject: Re: [ANNOUNCE] DualFS: File System with Meta-data and Data Separation

On Fri, 16 February 2007 18:47:48 -0500, Bill Davidsen wrote:
> >
> Actually I am interested in the common case, where the machine is not 
> out of space, or memory, or CPU, but when it is appropriately sized to 
> the workload. Not that I lack interest in corner cases, but the "running 
> flat out" case doesn't reflect case where there's enough hardware, now 
> the o/s needs to use it well.

There is one detail about this specific corner case you may be missing.
Most log-structured filesystems don't just drop in performance - they
can run into a deadlock and the only recovery from this is the lovely
backup-mkfs-restore procedure.

If it was just performance, I would agree with you.

Jörn

-- 
He that composes himself is wiser than he that composes a book.
-- B. Franklin
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