This article serves as a how-to guide for users who want to perform failover on a target core.
In the case of a severe outage in which your source core and agents are unavailable for weeks or months, AppAssure 5 supports failover and failback in replicated environments. Failover refers to switching to a redundant or standby target AppAssure Core upon system failure or abnormal termination of a source core and associated agents. The main goal of failover is to launch a new agent identical to the failed agent that was protected by the failed source core. The secondary goal is to switch the target core into a new mode so that the target core protects the failover agent in the same way as the source core protected the initial agent before the failure. The target core can recover instances from replicated agents and immediately commence protection on the failed-over machines.
Failback is the process of restoring an agent and core back to their original states (before failure). The primary goal of failback is to restore the agent (in most cases, this is a new machine replacing a failed agent) to a state identical to the latest state of the new, temporary agent. When restored, it is protected by a restored source core. Replication is also restored, and the target core acts as a replication target again.
