Info-cyrus Digest, Vol 56, Issue 14

[Diego Ventrice]

Thanks Andrew,

Last question if you let me:
What criteria is generally used for which maiolboxes will be created on what
back end server ?


Thanks
Diego




On Mon, Mar 15, 2010 at 8:10 PM, Andrew Morgan <morgan at orst.edu> wrote:

> 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
>
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