On 03/06/2013 04:46 PM, Les Mikesell wrote: > On Wed, Mar 6, 2013 at 9:28 AM, Maarten <m...@milieudefensie.nl> wrote: > >> Thanks for the quick response. I assumed that BackupPC was just creating >> hardlinks in the pool for files on the same location. If what you say is >> correct, does that mean it calculates checksums of each file, hence >> never saving a duplicate file no matter where it resides on the filesystem? >> >> That would be perfect. > > Yes - the pool/cpool directory is full of extra hardlinks where the > hash of the content is the name to quickly match up new items (plus a > little extra work to deal with collisions). Rsync just follows the > existing pc directory tree though, so you do have to copy the data > from each new location once, but storage is all pooled. If the target > system is local, that usually isn't a problem. If it is over a > low-bandwidth connection it might be worth some extra work to fake the > initial tree with a copy of the old link tree.
OK, thanks for clarifying this. I feel silly that I have used BackupPC for years but never realized this. The bandwidth is not an issue, so I'm about to start a new full backup right away. Best, Maarten ------------------------------------------------------------------------------ Symantec Endpoint Protection 12 positioned as A LEADER in The Forrester Wave(TM): Endpoint Security, Q1 2013 and "remains a good choice" in the endpoint security space. For insight on selecting the right partner to tackle endpoint security challenges, access the full report. http://p.sf.net/sfu/symantec-dev2dev _______________________________________________ BackupPC-users mailing list BackupPC-users@lists.sourceforge.net List: https://lists.sourceforge.net/lists/listinfo/backuppc-users Wiki: http://backuppc.wiki.sourceforge.net Project: http://backuppc.sourceforge.net/
