Making project backups?

For a long time, I made project backups by just rsync'ing the project
directories (once a month).  This works fine, and still does.  However,
backing up the trac database is a bit problematic.  According to
<http://trac.edgewall.org/wiki/TracBackup>, you need to use trac-admin
to lock the database and make a copy.

I guess I can use a cronjob for that periodically and have my rsync job
pull that version, but I was wondering how others handled backups.

Ray