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Re: Minor version upgrades across a cluster


2016-10-26 16:58 GMT+03:00 Craig Bailey <cbailey@xxxxxxxxxx>:
> We have a three node MariaDB Galera cluster on version 10.1.14 an we would
> like to upgrade to 10.1.18. Our approach to this was to offline a node
> upgrade it and then add it back to the cluster and allow it to do an IST to
> catch up (rinse and repeat for other two nodes).
> However this would mean that we will have a period of time where nodes in
> the cluster will be on different minor versions, is this safe, or will it
> possibly cause some kind of data corruption or crash?

I'd not anticipate any troubles. You can rehearse it. Also reading
change log is worthwhile.