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Date: Sun, 29 Jul 2007 07:58:05 -0700
From: "Ray Lee" <ray-lk@madrabbit.org>
Subject: Re: RFT: updatedb "morning after" problem [was: Re: -mm merge plans for 2.6.23]
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To: Rene Herman <rene.herman@gmail.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>, david@lang.hm, Daniel Hazelton <dhazelton@enter.net>, Mike Galbraith <efault@gmx.de>, Andrew Morton <akpm@linux-foundation.org>, Ingo Molnar <mingo@elte.hu>, Frank Kingswood <frank@kingswood-consulting.co.uk>, Andi Kleen <andi@firstfloor.org>, Nick Piggin <nickpiggin@yahoo.com.au>, Jesper Juhl <jesper.juhl@gmail.com>, ck list <ck@vds.kolivas.org>, Paul Jackson <pj@sgi.com>, linux-mm@kvack.org, linux-kernel@vger.kernel.org
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On 7/29/07, Rene Herman <rene.herman@gmail.com> wrote:
> On 07/29/2007 03:12 PM, Alan Cox wrote:
> > More radically if anyone wants to do real researchy type work - how about
> > log structured swap with a cleaner  ?
>
> Right over my head. Why does log-structure help anything?

Log structured disk layouts allow for better placement of writeout, so
that you cn eliminate most or all seeks. Seeks are the enemy when
trying to get full disk bandwidth.

google on log structured disk layout, or somesuch, for details.

Ray

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