Michael Bacon wrote: > > Solid state disk for the partition with the mailboxes database. > > This thing is amazing. We've got one of the gizmos with a battery > backup and a RAID array of Winchester disks that it writes off to if > it loses power, but the latency levels on this thing are > non-existent. Writes to the mailboxes database return almost > instantaneously when compared to regular spinning disks. Based on my > experience, that's bound to be a much bigger chunk of time than > traversing a linked list in kernel memory. > > For anyone doing a big Cyrus install, I would strongly recommend this. > Thanks for the idea Michael. I am thinking when our Sun Dtrace testing starts, to see if I can throw in one config where the DB are run out of tmpfs in order to excercise whether latency to those databases is causing the pileup. I have also seen a posting from Pascal that ZFS mirrored configs have latency issues which may be contributing. I'm not ready to point any fingers but it certainly seems worth investigating. It's a pity I can't find any Sun SDD drives that could just slot into our existing SAN setups. ---- 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
