http://www.asahi-net.or.jp/~iu9m-tcym/svndoc/svn_backup_dumps_py.html

#svn-backup-dumps.py -b /var/svn/repos /tmp/backupsvn/repos

10リビジョン毎にバックアップする

#svn-backup-dumps.py -b -c 10 /var/svn/repos /tmp/backupsvn/repos

リビジョン15だけをバックアップする

#svn-backup-dumps.py -b -r 15 /var/svn/repos /tmp/backupsvn/repos

#svnadmin create /var/svn/newrepo
#bzip2 -c -d /tmp/backupsvn/repos/～.bz2 | svnadmin load /var/svn/newrepo

 cd /home/svn/repos/hoge/hooks
 vim post-commit
#!/bin/sh

REPOS="$1"
REV="$2"
SVNBACKUPDUMPS=svn-backup-dumps.py
#PATH=$PATH:svn-backup-dumps.pyのパス
PYTHON=/usr/bin/python

# バックアップ先
BACKUPDIR=/tmp/svnbk/backup

$PYTHON $SVNBACKUPDUMPS -r $REV $REPOS $BACKUPDIR