Multiple master processes?

Rob Siemborski rjs3 at
Tue Jul 22 16:58:32 EDT 2003

On Tue, 22 Jul 2003, Scott Adkins wrote:

> I am curious about the experiences of others out there that might have
> run more than one cyrus master on the same server for whatever reason...
> Are there any issues with interacting with the databases?  My guess is
> that as locking is working properly, there should be any issues at all.
> I just needed to confirm it with others first before we look at putting
> this philosophy into production.

This should be safe.  Master is sort of like a souped-up inetd and thats

> By the way, with regards to the locking issues:
>   1) Yes, I have the lock patch that has been posted applied, so we are
>      less likely to see it.
>   2) No, we aren't going to limit the LMTP processes to some ridiculously
>      low number so that there is a 1:1 relationship of LMTP processes to
>      IMAP partitions.  I/O performance is a bit more complex than that...

More recent versions seem to have this problem significantly less.


Rob Siemborski * Andrew Systems Group * Cyert Hall 207 * 412-268-7456
Research Systems Programmer * /usr/contributed Gatekeeper

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