BackupPC 4.0.0 is a significant improvement over 3.x in terms of performance and storage efficiency. It is backward compatible with 3.x pool storage, so it can be used to upgrade an existing installation as well as for brand new installs.
BackupPC 4.0.0 requires the perl module BackupPC::XS (>= 0.50) and rsync-bpc (>= 3.0.9.5). Those releases are here:
After installing those releases, BackupPC 4.0.0 can be installed from the tar ball with:
tar zxf BackupPC-4.0.0.tar.gz
cd BackupPC-4.0.0
perl configure.pl
See the README.md, ChangeLog and doc/BackupPC.html files for more information.
Enjoy!!