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. -rob On Nov 30, 2007, at 19:59, Vincent Fox wrote: > How "unsafe" is setting in imapd.conf > > skiplist_unsafe: 1 > > Our /var/cyrus/imap filesystem is on a ZFS mirror set on > arrays with dual controllers so OS and/or hardware > corruption is remote. > > The application can scramble it but that can happen > whether we have sync or not eh? > > Anything I am missing? > > ---- > 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 ---- 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
