MySQL 5.7 Reference Manual Including MySQL NDB Cluster 7.5 and NDB Cluster 7.6
The arbitrator_validity_summary table
provides a composite view of the arbitrator with regard to the
cluster's data nodes.
The arbitrator_validity_summary table
contains the following columns:
arbitrator
Node ID of arbitrator
arb_ticket
Internal identifier used to track arbitration
arb_connected
Whether this arbitrator is connected to the cluster; either
of Yes or No
consensus_count
Number of data nodes that see this node as arbitrator
In normal operations, this table should have only 1 row for any appreciable length of time. If it has more than 1 row for longer than a few moments, then either not all nodes are connected to the arbitrator, or all nodes are connected, but do not agree on the same arbitrator.
The arbitrator column shows the
arbitrator's node ID.
arb_ticket is the internal identifier used by
this arbitrator.
arb_connected shows whether this node is
connected to the cluster as an arbitrator.