Quorum and Leader

A persistence cluster can interact with clients only when a quorum of persistence services exists. This requirement ensures correct replication and fault tolerance.

When a quorum exists, one of the services takes the role of leader, that is, the service that interacts with clients. All other services in the quorum replicate the leader’s data, but do not interact with clients.

Administrators can set the weight of each persistence service to determine an order of relative preference in which services become the leader.

See Also

Related concepts