Hey, all. I just did a quick search, and haven't noticed any hits on "btrfs" in the subject lines of any e-mail here. Which makes me wonder if anyone has noticed it. Btrfs only supports 256 (or is it 512?) hardlinks per directory; that's a hard-coded value that is unlikely to change, as it would require an on-disk format change. I'm fairly certain that BackupPC will blow past that for a directory with lots of static entries, no? If so, should BackupPC - Figure out if it's on a btrfs filesystem, and, if so, - switch from hardlinks to COW "clones"?
COW clones are a different mechanism entirely than a hardlink; however, insofar as BackupPC is concerned, I think they might well be considered identical. It's my understanding that BackupPC only hardlinks static files that won't change; in this scenario, I believe a COW clone would work just the same. If there's a flaw in my logic, I'd deeply appreciate someone pointing it out -- I'm not claiming to be an expert in either BackupPC or btrfs, but believe I've outlined (correctly, even) the issues involved. If nobody else is interested, I'm willing to take a stab at this, though my spare cycles for the next month or two are asymptotically approaching 0. Thanks, -Ken -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. ------------------------------------------------------------------------------ The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://p.sf.net/sfu/dev2dev-palm _______________________________________________ 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/
