Requiring Manual Intervention Before Failback Occurs

It is recommended that when a failed data center recovers, attempting to restore services to the recovered data center is not initiated (a failback) before the application failover process is complete and until the recovered data center is deemed to be healthy. In addition, the mailbox databases should beready for use.

If the failback is initiated before these are complete, then issues may arise with the mailbox databases and prolong the outage.

We recommend not allowing automatic failbacks when a failed data center recovers in the case of Microsoft Exchange. Requiring some manual intervention before a recovered data center is deemed available for a failback means that administrators can ensure that the optimal conditions exist before a failback occurs.

The LoadMaster provides Site Recovery Mode options that determine how a failed data center becomes available for failback upon recovery. Selecting the manual option configures the LoadMaster to administratively disable the failed data center upon the initiation of a failover. This ensures that, even if the failed data center recovers, administrator intervention would be required before the data center is available for a failback to occur.