HP StoreOnce Backup System Concepts and Configuration Guidelines (BB877-90913, November 2013)

In Figure 56 we deliberately provide one node on each couplet that is dedicated to replication.
This simplifies the management, and the loading and performance is easier to predict. The way
the couplets are balanced also means that wherever a node fails over we do not lose all our
replication performance. In the failover scenario the remaining node can still handle backup in
one time window and replication in another time window so the overall impact of a failed node
is not that damaging.
Figure 56 Using dedicated nodes for replication targets in an Active/Active configuration
Active/Passive and Active/Active configurations 101