The quorum strategy determines the conditions under which a leader election is valid. If an election is deemed invalid, no server will be designated as the leader, causing the system to stop operating. Whether this behavior is desirable depends on the nature of the server group's activities and the design of the network in which it operates. Therefore, it's crucial to understand how these quorum strategies work and choose the appropriate one for your situation.

To address the situation where quorum may be temporarily lost when a new server is added to the server group, but the new server has not yet submitted a ballot, a quorum is valid for the current and next election (that is, no leader will be elected because of quorum, only if a quorum has not been met for two consecutive elections).

Instant Connect supports three different quorum strategies, each described below: