Upgrading Murder from 2.3 to 2.4

[David Mayo]

We are looking at upgrading from Cyrus IMAP 2.3 to 2.4. We run a Murder 
with one front end server and one back end server. We plan to XFER 
mailboxes from the old back end to a new back end server with more storage.

 From the mailing list I understand we should upgrade the front end 
server first before transferring mailboxes.

My planned changes for the front end server are to add the 
suppress_capabilities directive to imapd.conf, ensure the lock directory 
is created on tmpfs and touch a blank user_deny.db. My expectation is 
that I can stop the front end server, upgrade the software and restart 
it with the updated imapd.conf.

As far as the front end upgrade is concerned, is there really any 
difference between the behaviour of 2.3 vs 2.4? Most of the changes 
appear to be focused on the mailbox handling code. Does anyone running a 
Murder have experience of the upgrade from 2.3 to 2.4 they could share? 
Will users notice any difference at this stage?

Thanks,


Dave.

David Mayo
Networks/Systems Administrator
University of Bath Computing Services, UK