Partial metadata rebuilding For highly active subversion repositories, it can be excruciatingly slow to pull updates one at a time from subversion. One way around this is to setup another mercurial repo that pulls new commits from svn periodicly (say every 5 minutes). When you want to update your repository, you can pull commits from this mercurial repository via native mercurial protocols, which will be much faster than pulling directly from svn. Unfortunately, your metadata will be out of date after doing so. Highly active repositories also tend to be very large, which means that it takes a long time to rebuild your metadata from scratch. To address this, this adds support to do a partial rebuild on the metadata by processing only revisions that have been added to the repository after the last revision we processed. With the rev map 1k revisions (~2 days) behind tip updatemeta is dramatically faster than rebuild meta: $ hg --time svn updatemeta Time: real 0.570 secs (user 0.480+0.000 sys 0.060+0.000) $ hg --time svn rebuildmeta Time: real 129.160 secs (user 128.570+0.000 sys 0.320+0.000)

#!/bin/sh
mkdir temp
cd temp
svnadmin create repo
svn co file://`pwd`/repo wc
cd wc
mkdir branches trunk tags
mkdir tags/versions
mkdir tags/blah
svn add *
svn ci -m 'btt'
cd trunk
for a in alpha beta gamma delta ; do
    echo $a > $a
    svn add $a
done
svn ci -m 'Add files.'

echo 'foo bar' > 'foo bar'
svn add 'foo bar'
svn ci -m 'Add files.'

mkdir 'blah blah'
echo 'another file' > 'blah blah/another file'
svn add 'blah blah'
svn ci -m 'Add files.'

cd ..
svn up
svn cp trunk branches/dev_branch
svn ci -m 'Make a branch'
cd ../..

svnadmin dump temp/repo > spaces-in-path.svndump
echo
echo 'Complete.'
echo 'You probably want to clean up temp now.'
echo 'Dump in spaces-in-path.svndump'
exit 0