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Re: Sharded FSFS repositories

From: John Peacock <jpeacock_at_rowman.com>
Date: 2007-03-20 15:26:49 CET

Malcolm Rowe wrote:
> My results:
> - With one exception, sharding is always more expensive than not
> sharding (because it adds an extra directory lookup). The difference
> is negligible, however, because we're still talking about microseconds
> per lookup.

Thank you for taking the time to benchmark something, rather than
relying on Magic Numbers (something I'm severely allergic to). ;-)

> - We'll create shards of 1000 entries each. Anyone who has a repository
> that's larger than a million revisions will likely be running on a
> decent filesystem. Even if they aren't, we will still be much better
> than we were before.

I concur that this is a reasonable course. Malcolm++


John Peacock
Director of Information Research and Technology
Rowman & Littlefield Publishing Group
4501 Forbes Boulevard
Suite H
Lanham, MD  20706
301-459-3366 x.5010
fax 301-429-5748
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Received on Tue Mar 20 15:26:54 2007

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