2.3 to 2.4 Murder upgrade

Dave McMurtrie dave64 at andrew.cmu.edu
Fri Oct 14 19:26:26 EDT 2011

On Oct 14, 2011, at 7:16 PM, Andrew Morgan <morgan at orst.edu> wrote:

> I finally have some time to work on upgrading our Cyrus Murder 
> installation from 2.3.16 to 2.4.12.  We have 3 backends, 3 frontends, and 
> a mupdate master, all separate systems.
> When I upgraded from 2.2 to 2.3, I had to upgrade the backends first. 
> Otherwise, the 2.3 frontends would issue commands that the 2.2 backends 
> didn't know yet.  I see the following note in the install-upgrade guide:
> Upgrading from 2.4.5
>     New config option: suppress_capabilities, which takes a space 
> separated list of capabilities which will NOT be given in any imap 
> capability response. This can be used on frontends to not display 
> capabilities that older backends don't have, so clients don't get confused
> This leads me to believe that I should upgrade the backends to 2.4 first. 
> Is that true?  Has anyone done a Murder upgrade from 2.3 to 2.4 and can 
> tell me what order they upgraded the hosts?

Yes, you'll want to upgrade the frontends first and suppress the new capabilities on the frontends that the old backends aren't yet aware of.



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