On Sat, May 05, 2007 at 10:14:07AM -0700, Vincent Fox wrote: > Gary Mills wrote: > >There was a question earlier regarding ZFS for Cyrus IMAP storage. We > >recently converted to that filesystem here. I'm extremely pleased > >with it. Our server has about 30,000 users with over 200,000 > >mailboxes. It peaks at about 1900 IMAP sessions. It currently has 1 > >TB of storage with about 300 GB in use. The server is a Sun T2000 > >with 16 GB of memory, running Solaris 10. It uses iSCSI to provide two > >500 GB devices from our Netapp filer. Disk redundancy is all on the > >Netapp because it's currently superior to that provided by ZFS. > > Our T2000 have 8 GB for the cluster we are building here at University > of California Davis. > Would you expect we will be having to upgrade RAM, or is it just gravy? I really don't know. IMAP sessions need lots of memory. ZFS will use all it can get for its ARC cache. For a one-off server, I find it cheaper to overdesign it than to devote a lot of time to full load testing. -- -Gary Mills- -Unix Support- -U of M Academic Computing and Networking- ---- 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
