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Re: Sharded FSFS repositories - summary

From: Karl Fogel <kfogel_at_red-bean.com>
Date: 2007-03-14 08:50:41 CET

Malcolm Rowe <malcolm-svn-dev@farside.org.uk> writes:
> - We'll create shards of 4000 entries each. That's large enough that
> someone would have to hit 16M revisions before a larger value would be
> an improvement, but small enough that it has reasonable performance
> (and support) on all filesystems that I'm aware of. It's also a
> power-of-ten, so easier for humans to understand.

Although the exact parameters may not be admin-configurable, will they
still be Subversion-configurable? That is, will we store the magic
number "4000" somewhere on disk, so that if Subversion wants to
rejigger the numbers later (because we discover something, or because
someone blows past 16M revisions, or whatever) it can do so in a way
that it can detect at run-time?

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Received on Wed Mar 14 08:50:57 2007

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