netdev - Re: Distributed storage.

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Message-ID: <1a297b360708022204u4fc7603pb6baebe2bdf28618@mail.gmail.com>
Date:	Fri, 3 Aug 2007 09:04:51 +0400
From:	"Manu Abraham" <abraham.manu@...il.com>
To:	"Evgeniy Polyakov" <johnpol@....mipt.ru>
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org
Subject: Re: Distributed storage.

On 7/31/07, Evgeniy Polyakov <johnpol@....mipt.ru> wrote:

> TODO list currently includes following main items:
>     * redundancy algorithm (drop me a request of your own, but it is highly
>         unlikley that Reed-Solomon based will ever be used - it is too slow
>         for distributed RAID, I consider WEAVER codes)


LDPC codes[1][2] have been replacing Turbo code[3] with regards to
communication links and we have been seeing that transition. (maybe
helpful, came to mind seeing the mention of Turbo code) Don't know how
weaver compares to LDPC, though found some comparisons [4][5] But
looking at fault tolerance figures, i guess Weaver is much better.

[1] http://www.ldpc-codes.com/
[2] http://portal.acm.org/citation.cfm?id=1240497
[3] http://en.wikipedia.org/wiki/Turbo_code
[4] http://domino.research.ibm.com/library/cyberdig.nsf/papers/BD559022A190D41C85257212006CEC11/$File/rj10391.pdf
[5] http://hplabs.hp.com/personal/Jay_Wylie/publications/wylie_dsn2007.pdf
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