On Tue, August 10, 2010 16:41, Dave Pacheco wrote: > David Dyer-Bennet wrote:
>> If that turns out to be the problem, that'll be annoying to work around >> (I'm making snapshots every two hours and deleting them after a couple >> of >> weeks). Locks between admin scripts rarely end well, in my experience. >> But at least I'd know what I had to work around. >> >> Am I looking for too much here? I *thought* I was doing something that >> should be simple and basic and frequently used nearly everywhere, and >> hence certain to work. "What could go wrong?", I thought :-). If I'm >> doing something inherently dicey I can try to find a way to back off; as >> my primary backup process, this needs to be rock-solid. > > > It's certainly a reasonable thing to do and it should work. There have > been a few problems around deleting and renaming snapshots as they're > being sent, but the delete issues were fixed in build 123 by having > zfs_send hold snapshots being sent (as long as you've upgraded your pool > past version 18), and it sounds like you're not doing renames, so your > problem may be unrelated. AHA! You may have nailed the issue -- I've upgraded from 111b to 134, but have not yet upgraded my pool. Checking...yes, the pool I'm sending from is V14. (I don't instantly upgrade pools; I need to preserve the option of falling back to older software for a while after an upgrade.) So, I should try either turning off my snapshot creator/deleter during the backup, or upgrade the pool. Will do! (I will eventually upgrade the pool of course, but I think I'll try the more reversible option first. I can have the deleter check for the pid file the backup already creates to avoid two backups running at once.) Thank you very much! This is extremely encouraging. -- David Dyer-Bennet, d...@dd-b.net; http://dd-b.net/ Snapshots: http://dd-b.net/dd-b/SnapshotAlbum/data/ Photos: http://dd-b.net/photography/gallery/ Dragaera: http://dragaera.info _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
