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Maximum number of concurrent replication operations in an HA pair

If a failover occurs, the available system cannot process more than the maximum number of concurrent replication operations specified for that system. These operations can be those that were scheduled for the surviving system, the failed-over system, or both.

If a failover occurs during data backup, all of the concurrent transfers happening at the time of the failure on the failed node are aborted, and are rescheduled by the partner node. Conversely, if a giveback occurs during data backup, all of the concurrent transfers happening at the time of the giveback on behalf of the partner node are aborted, and are rescheduled by the partner node.

If more than the maximum number of SnapMirror volume or qtree replications are scheduled to run concurrently, each additional transfer generates an error message stating that resource limits have been reached. Each transfer beyond the maximum is re-attempted once per minute until it succeeds, SnapMirror is turned off, or the update is terminated.