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Re: 1.5 svnadmin verify performance

From: Jan Hendrik <list.jan.hendrik_at_gmail.com>
Date: Mon, 18 Aug 2008 18:12:30 +0200

Concerning 1.5 svnadmin verify performance
kmradke_at_rockwellcollins.com wrote on 18 Aug 2008, 10:39, at least in part:

> I was curious if anyone else has noticed a significant performance
> difference between "svnadmin verify" in 1.4.6 and 1.5.1.
> Completely verifying our large amount of data used to take
> about 8 hours, but after the version change, I'm seeing around
> 14 hours. (No hardware differences and very little data change.)
> Both svnadmin versions were compiled from source with the
> same compile options...
> All repos are fsfs and have not yet had "svnadmin upgrade" done.
> Anyone else seen similar behavior?
> I would suspect dump/load times would be similarly slower,
> but haven't tested that theory...

dump: 1.5 hrs (SVN 1.4.6, BDB)
load: 5 hrs (SVN 1.5.1, BDB)

Both on a P4/1.6MHz/1GB RAM/Win2k SP4 system.
Dumpfile 1.6GB for 2500 revs.

On an otherwise ways speedier Centrino laptop with 2GB RAM (XP
SP2) loading of the very same dumpfile into a 1.5.1 BDB repository
takes 8 hrs, dito svnsync, into an FSFS repository 40 minutes. I
suppose the time gain in loading has a penalty in overall use
speed. There probably is a slight speed gain when the dumpfile is
loaded over a 100Mbit network connection rather than from the
same machine. BTW the size of the FSFS repository is about
30% smaller than the BDB repository as this was recently asked in
another thread.

Not exactly the experience you asked for, but strange enough, too.

Jan Hendrik

Freedom quote:

     Facts do not cease to exist because they are ignored.
               -- Aldous Huxley

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Received on 2008-08-18 18:11:12 CEST

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