On May 30, 2010, at 10:35 PM, David Magda wrote: > An event framework would certainly be helpful in a general sense (Linux has > event(3) AFAIK), and that could certainly be useful for purging snapshots > during resource constrained situations. But even if we don't have it, I doubt > a fork(2) from cron(8) and a statfs(2) would be onerous on a system. :)
Devd already receives several ZFS-based events (failed vdev, I/O error, checksum mismatch, etc.), so perhaps it would be useful to add another, e.g., "space" which is set to be triggered when a pool attains a certain percentage full. This could default to 100%, but be capable of being set lower by an associated kernel sysctl. You could then have any auto-pruning/snapshot management script triggered from devd. (You'd probably also have to figure out some kind of throttling mechanism for this devd event, too.) Cheers, Paul. _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[email protected]"
