Replica Set High Availability副本集高可用性

Replica sets use elections to support high availability.副本集使用选举来支持高可用性。

Replica Set Elections副本集选择

Elections occur when the primary becomes unavailable and the replica set members autonomously select a new primary.当主副本变得不可用并且副本集成员自主选择新的主副本时，将进行选择。

Rollbacks During Replica Set Failover副本集故障转移期间的回滚

A rollback reverts write operations on a former primary when the member rejoins the replica set after a failover.当成员在故障转移后重新加入副本集时，回滚将恢复对以前主成员的写操作。