> I enabled it a few weeks ago before I left UMBC, and it certainly > seemed to help write performance on the ZFS pool -- we started seeing > the larger batched writes on those devices, instead of a constant > stream of itty bity IOs caused by the constant fsync'ing. > > If you feel that your filesystem/buffercache will do a good job at > writing things out to disk, and you've got battery-backed cache on > your storage, you should be relatively well off. But if I were to turn skiplist_unsafe on, and the OS crashed - or, say, the cluster system forcibly unmounted my Cyrus spool and config filesystems - wouldn't that result in horribly unrecoverable databases all over the place? (I have everything in skiplist, except quota and subscriptions.) --Janne -- Janne Peltonen <janne.peltonen@xxxxxxxxxxx> ---- Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
