MariaDB Production Checklist

The cluster has an odd number of members, or two members plus a garbd arbitrator.

wsrep_cluster_status is Primary and wsrep_local_state_comment is Synced on every node.

innodb_autoinc_lock_mode = 2 and binlog_format = ROW on every node.

wsrep_sst_method uses mariabackup so a state transfer does not block the donor.

gcache.size is large enough that a routine node restart rejoins by IST rather than a full SST.

The bootstrap procedure after a full cluster shutdown is documented, including how to identify the node with the highest seqno.

A proxy designates a single writer node, so certification conflicts stay rare.

Alerts exist for cluster size changes, flow control pauses and certification failures.