Cyrus 'cluster' general upgrade strategy?

[Wesley Craig]

You'll need to upgrade primary and replica backends together for a  
2.3.7 to 2.3.8 upgrade.  Other than that, you can upgrade just one  
backend pair in a 2.3.7 cluster, no problem.  Once you have  
confidence in the correctness of 2.3.8, upgrade the rest of the  
backends.  It's also pretty common to mix 2.3.x backends with 2.2.x  
frontends and/or master.

:wes

On 15 May 2007, at 14:24, Nik Conwell wrote:
> For those with medium to large scale murders or other glued  
> together clusters of cyrus servers, what's the general strategy for  
> upgrading?
>
> Do you take downtime for the entire cluster and upgrade, or do you  
> roll through upgrades of the parts?
>
> The latter would be prudent, except that I discovered you can't  
> replicate 2.3.7 to 2.3.8 (CREATE has an extra argument at 2.3.8) so  
> it wouldn't surprise me if it generally isn't considered a good  
> idea to mix versions like this in a murder.