On Fri, Apr 29, 2011 at 01:56:01PM +0200, Juergen Hannken-Illjes wrote: > On Fri, Apr 29, 2011 at 01:48:39PM +0200, Manuel Bouyer wrote: > > With your last changes, things are much better now: > > /usr/bin/time fssconfig fss0 /home /home/snaps/snap0 > > 149.85 real 0.00 user 1.16 sys > > /home: suspended 0.040 sec, redo 0 of 2556 > > /usr/bin/time fssconfig fss1 /home /home/snaps/snap1 > > 227.49 real 0.00 user 1.90 sys > > /home: suspended 0.040 sec, redo 0 of 2556 > > /usr/bin/time fssconfig fss2 /home /home/snaps/snap2 > > 263.58 real 0.00 user 2.97 sys > > /home: suspended 0.040 sec, redo 0 of 2556 > > /usr/bin/time fssconfig fss3 /home /home/snaps/snap3 > > 353.23 real 0.00 user 3.88 sys > > /home: suspended 0.040 sec, redo 0 of 2556 > > > > Taking a snapshot will still probably require a lot of time on > > large filesystems with a dozen snapshots, but at last the server > > won't hang for a long time. > > thanks ! > > Not really. Any thread ending up in ffs_copyonwrite() or ffs_snapblkfree() > will block. If this server runs NFS it could be possible that all NFS > server threads block.
hum, this is bad then, because a NFS server with home directories is seeing mostly writes ... -- Manuel Bouyer <bou...@antioche.eu.org> NetBSD: 26 ans d'experience feront toujours la difference --