On Sat, Apr 7, 2012 at 7:49 PM, Alexander, Clint Mr ARMY GUEST USA USAMC USA <clint.alexan...@us.army.mil> wrote: >> Rsync needs the -H option to recreate the hardlinks. There are some >> practical limits to the size of a pool that can be copied in a >> reasonable amount of time because identifying and recreating the >> hardlinks is somewhat inefficient - and you have to include the entire >> tree in one pass for it to work. > > I found this as well (even though most instructions give the archive mode > (-a) without the hard-link switch). > > > What about the requirements of the two directory structures: > __topdir__/data/pc & __topdir__/data/cpool
That's where the hardlinks that provide pooling happen. They must be in the same filesystem. > If I only copy the "pc" directory to another server, I noticed that my new > installation of BackupPC apparently reads it just fine and displays the > previous full and incrementals that we've collected over the years. The copies that are made only to the pc directory won't be shared. Depending on how you copied them, they may still have the hard links to each other, but they need the cpool link if you want to be able to match up the content on new backups. > The > backuppc service seems to look for existence and ownership of "cpool", but > does not complain that it is empty (which it is in my test environment). > > Do we really need the cpool directory? Will backuppc rebuild this in some > way? If you use rsync, new backups will make hardlinks to files where the names and content match the reference backup, but these won't be added back to the pool. And if you add new targets, their files will make links into the pool, but these will continue to be separate instances from the ones you copied under /pc/ without the pool links. Everything should actually work correctly, but you'll never regain the space until all of the copied backups expire. -- Les Mikesell lesmikes...@gmail.com ------------------------------------------------------------------------------ For Developers, A Lot Can Happen In A Second. Boundary is the first to Know...and Tell You. Monitor Your Applications in Ultra-Fine Resolution. Try it FREE! http://p.sf.net/sfu/Boundary-d2dvs2 _______________________________________________ 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/