Info-cyrus Digest, Vol 56, Issue 14
morgan at orst.edu
Mon Mar 15 19:10:43 EDT 2010
On Mon, 15 Mar 2010, Diego Ventrice wrote:
> 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
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.
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