William, Recently a lot of testing was done on this (https://jira.mariadb.org/browse/MDEV-27437).
>From reading https://jira.mariadb.org/browse/MDEV-28247 an upgrade to 10.3.35 might be required first (or an explicit disable of background merge - if possible). So sst=rsync is required with innodb_use_native_aio=0. https://mariadb.com/kb/en/introduction-to-state-snapshot-transfers-ssts/#rsync-rsync_wan There's a task to upgrade the documentation, but I agree there are a few gaps at the moment. https://jira.mariadb.org/browse/MDEV-28483 The reddit user https://www.reddit.com/r/mariadb/comments/us7wbs/joining_node_to_galera_cluster_failed/ is attempting the same. On Thu, May 19, 2022 at 4:02 AM William Edwards <wedwa...@cyberfusion.nl> wrote: > > Hi, > > Does Galera support rolling upgrades between multiple major versions? > I > will be upgrading my Galera cluster from MariaDB 10.3.34 to 10.6.x. It'd > save a lot of time to jump straight from 10.3 to 10.6 instead of > upgrading 10.3 -> 10.4 -> 10.5 -> 10.6. > > The documentation at > https://mariadb.com/kb/en/upgrading-from-mariadb-103-to-mariadb-104-with-galera-cluster/ > implies that the MariaDB version is irrelevant, and only the Galera > version matters. > > > Next, make sure that the Galera version numbers are compatible. > > > > If you are upgrading from the most recent MariaDB 10.3 release to > > MariaDB 10.4, then the versions will > > be compatible. MariaDB 10.3 uses Galera 3 (i.e. Galera wsrep provider > > versions 25.3.x), and MariaDB > > 10.4 uses Galera 4 (i.e. Galera wsrep provider versions 26.4.x). This > > means that upgrading to MariaDB > > 10.4 also upgrades the system to Galera 4. However, Galera 3 and Galera > > 4 should be compatible for the > > purposes of a rolling upgrade, as long as you are using Galera 26.4.2 > > or later. > > -- > With kind regards, > > William Edwards > > > _______________________________________________ > Mailing list: https://launchpad.net/~maria-discuss > Post to : maria-discuss@lists.launchpad.net > Unsubscribe : https://launchpad.net/~maria-discuss > More help : https://help.launchpad.net/ListHelp _______________________________________________ Mailing list: https://launchpad.net/~maria-discuss Post to : maria-discuss@lists.launchpad.net Unsubscribe : https://launchpad.net/~maria-discuss More help : https://help.launchpad.net/ListHelp
