csync2 backup-generations

Hi,

I use csync2 to sync files between three hosts, and problem is currently files with unique filenames, e.g. files with timestamps in names. They will never get more than one copy in backup directory (e.g. /var/lib/csync2). and they only waste space. Is there any way to blacklist file names from backup directory? Can I do anything within csync2 or do I need to manually remove/delete them?