Possible availability improvement

Possible availability improvement

[Michał Sawicz]

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Hi all,

On the wave of Neil's recent roadmap proposal I wanted to forward an
idea to bring it upon discussion.

When things in md-world break, there's usually some big and long strain
on the array members. My colleague's idea is to virtually split the
members into smaller chunks and keep some metadata (events, checksum?)
for each of them to reduce the extent of recovery needed when faced
with, say, a power failure.

Does that make sense?

Kind regards
-- 
Michał Sawicz <michal@sawicz.net>

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Re: Possible availability improvement

[Mikael Abrahamsson]

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On Tue, 22 Feb 2011, Michał Sawicz wrote:

> When things in md-world break, there's usually some big and long strain
> on the array members. My colleague's idea is to virtually split the
> members into smaller chunks and keep some metadata (events, checksum?)
> for each of them to reduce the extent of recovery needed when faced
> with, say, a power failure.
>
> Does that make sense?

Yes.

Look in the documentation for "write intent bitmap".

-- 
Mikael Abrahamsson    email: swmike@swm.pp.se