The Ultimate Guide to High Availability with MariaDB

Comments - Is it possible to downgrade a Galera clusternode to a slightly older version and rejoin the cluster?

5 years, 7 months ago Geoff Montee
Re: Is it possible to downgrade a Galera clusternode to a slightly older version and rejoin the cluster? [Answer]

That should be fine, as long as there were no changes between MariaDB 10.2.9 and MariaDB 10.2.18 that broke backward compatibility. I took a quick look through the release notes for all of the releases between those versions, and I didn't see any.

However, I believe that MariaDB 10.2.19 did introduce a backward incompatible change with the new redo log changes that are tied to innodb_safe_truncate. It sounds like you aren't actually using MariaDB 10.2.19 though.

 
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