HP Application Recovery Manager software A.06.10 Concepts guide (March 2008)

After successful backup, details of the backup session are saved to the IDB.
Replica sets
A replica set is a collection of replicas created at different times using the same
backup specification. Replica sets are normally used when creating replicas for instant
recovery purposes.
In Application Recovery Manager, the members of a set can undergo replica set
rotation, either interactively or at times specified in the scheduler.
Replica set rotation
When you create a backup specification for ZDB and instant recovery purposes, you
specify the number of replicas in the replica set. Each time the backup is run, a new
replica in the replica set is created until the specified number is reached. The next
replica to be created then replaces the oldest replica in the set. With some replica
types, this is achieved by directly overwriting the existing replica, in other cases, the
oldest replica must be deleted before the new replica is created.
The maximum number of replicas that you can define in a set depends on the type
of array being used.
Scheduling replication
If you want replication sessions to be run automatically, enter details of required
times into the Application Recovery Manager scheduler when creating or modifying
the backup specification. You can either schedule a single session at a specific time,
or regular sessions, repeated over periods of days, weeks or months.
Using replicas
The replica continues to exist until it is rotated out of the replica set, you delete it
through the CLI, or it is used for instant recovery (although you can configure it to be
retained afterwards).
One or more replicas can be kept on an array. You can use replica set rotation to
maintain a set of replicas created at different times, where each new replica replaces
the oldest replica in the set.
Concepts guide 49