On Mon, 15 Mar 2010, Diego Ventrice wrote: > John, > > Few questions about murder if you dont mind. > > Does the front end server act as a load balancer, and also are back end > server replicated exact copies ? > > How would it be to deploy HA with murder, on the front servers ? Frontend servers are proxy servers. They lookup the location of the user's mailbox and proxy incoming IMAP connections to the correct backend server. Backend servers are not much different than a standalone, non-Murder, Cyrus server. Each backend server registers its list of mailboxes with the mupdate master server, which maintains a master list of the location of all mailboxes in the Murder cluster. The frontend servers read from the mupdate master to locate mailboxes. Backend servers are not fault-tolerant or highly-available. As far as I know, the only Cyrus method of achieving high availability is using Cyrus replication. Andy ---- 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
