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Re: [Gluster-devel] Re; Load balancing ...

From: Gordan Bobic
Subject: Re: [Gluster-devel] Re; Load balancing ...
Date: Wed, 30 Apr 2008 09:11:12 +0100
User-agent: Thunderbird (Windows/20080213)

Martin Fick wrote:

A better solution would be to maintain a list of
dirty blocks and use it during selfheal.

Agreed, but why not make it infinitely granular and
keep a list of dirty file spans instead of blocks? This should be extremely space efficient.

Is this complication and extra effort realy worth the benefit over straight rolling hash rsync approach? It seems to me that applying the rsync method at read-time would be a fairly minor mod that would solve 99% of the problem. No extra book-keeping would be required, only a change from copying the whole file to rsyncing the file.


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