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.
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