Hi, Peter Walter wrote on 2009-06-03 16:15:37 -0400 [Re: [BackupPC-users] Backing up a BackupPC server]: > [...] > My understanding is that, if it were not for the > hardlinks, that rsync transfers to another server would be more > feasible;
right. > that processing the hardlinks requires significant cpu > resources, memory resources, and that access times are very slow, Memory: yes. CPU: I don't think so. Access times very slow? Well, the inodes referenced from one directory are probably scattered all over the place, so traversing the file tree (e.g. "find $TopDir -ls") is probably slower than in "normal" directories. Or do you mean swapping slows down memory accesses by several orders of magnitude? > compared to processing ordinary files. Is my understanding correct? If > so, then what I would think of doing is (a) shutting down backuppc (b) > creating a "dump" file containing the hardlink metadata (c) backing up > the pooled files and the dump file using rsync (d) restarting backuppc. > I really don't need a live, working copy of the backuppc file system - > just a way to recreate it from a backup if necessary, using an "undump" > program that recreated the hardlinks from the dump file. Is this > approach feasible? Yes. I'm just not certain how you would test it. You can undoubtedly restore your pool to a new location, but apart from browsing a few random files, how would you verify it? Maybe create a new "dump" and compare the two ... Have you got the resources to try this? I believe I've got most of the code we'd need. I'd just need to take it apart ... Regards, Holger ------------------------------------------------------------------------------ OpenSolaris 2009.06 is a cutting edge operating system for enterprises looking to deploy the next generation of Solaris that includes the latest innovations from Sun and the OpenSource community. Download a copy and enjoy capabilities such as Networking, Storage and Virtualization. Go to: http://p.sf.net/sfu/opensolaris-get _______________________________________________ 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/
