Re: 2.3 to 2.4 Murder upgrade

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On Oct 14, 2011, at 7:16 PM, Andrew Morgan <morgan@xxxxxxxx> 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.

hth,

Dave
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