On Wed, 11 May 2011 14:32:56 -0400, Jeffrey J. Kosowsky wrote: > How big was your pool and pc tree?
We currently have two BackupPC servers we work with -- one of them is only about 20G of disk but is using a silly number of inodes (it's backing up a maildir mail server, among other things), and I think the other is around 3 or 4 TB of disk used at the moment. I don't remember which one we had to move, it happened about a year ago. The best I can recall is that we struggled with rsync for a week or so, then I found out about tarpipes and that got the job done overnight. You're right though, on second look, it looks like rsync -a should work just as well as tar. I'll have to do another BackupPC pool transfer in a few days, and now I'm curious what (if any) difference there is between tar and rsync, so I'll try both. - R. > The problem is not really a rsync-specific one but rather is due to > the huge number of hard links that must be tracked and cached which > both consumes an increasing amount of memory and also potentially cpu > power to sort/find the right link... > The bottom line is that if you are using a "generic" program like > rsync or tar that doesn't understand the special structure of the > pool > and pc hierarchies then essentially the inode and path of each pool > file must be cached and referenced when copying the archive. This > does > not scale well as many if not all people have found. > > I can believe though that tar might work ok on small archives (just > like rsync can)... -- [__ Robert Sheldon [__ Founder, No Problem [__ Information technology support and services [__ (530) 575-0278 [__ "You must be the change you wish to see in the world." -- Mahatma Gandhi ------------------------------------------------------------------------------ Achieve unprecedented app performance and reliability What every C/C++ and Fortran developer should know. Learn how Intel has extended the reach of its next-generation tools to help boost performance applications - inlcuding clusters. http://p.sf.net/sfu/intel-dev2devmay _______________________________________________ BackupPC-users mailing list [email protected] List: https://lists.sourceforge.net/lists/listinfo/backuppc-users Wiki: http://backuppc.wiki.sourceforge.net Project: http://backuppc.sourceforge.net/
