On Sat, 27 Sep 2008 13:46:39 +1000, "Rob Mueller" <robm@xxxxxxxxxxx> said: > Some things to try if you haven't: > > 1. Make sure you have noatime (and nodiratime if applicable) set on your > FS > 2. If on linux, use the deadline IO scheduler > 3. If you can, split your data and meta data onto separate volumes > (probably > a lot of work) > 4. Install more RAM and use a 64-bit OS. x64_64 linux can cache many, > many > more inodes and dentries in memory than x86 linux. > 5. Upgrade to the latest cyrus and enable the status cache 6. Don't fetch every single file from your cyrus server every backup run. One nice property of cyrus's on-disk format is that all the data files are immutable once created: b/user/brong/798. is always going to be the same file, no matter what happens to the mailbox. Only the cyrus.* files and new data file actually need to be fetched. (our system also stats the cyrus.* files, and uses some other funky tricks to ensure consistent backups with minimum IO) -- Bron Gondwana brong@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
