HP StorageWorks Storage Mirroring Recover User's Guide (T5437-96008, November 2009)

28 of 739
One-to-one, active/active
Description
Each server acts as both a source and target actively replicating data
to each other
Applications
This configuration is appropriate for failover and critical data backup.
This configuration is more cost-effective than the Active/Standby
configuration because there is no need to buy a dedicated target
server for each source. In this case, both servers can do full-time
production work.
Considerations
● Coordination of the configuration of Storage Mirroring Recover
and other applications can be more complex than the one-to-
one active/standby configuration.
● During replication, each server must continue to process its
normal workload.
● Administrators must avoid selecting a target destination path
that is included in the source’s replication set. Any overlap will
cause an infinite loop.
● To support the production activities of both servers during
failover without reducing performance, each server should
have sufficient disk space and processing resources.
● Failover and failback scripts must be implemented to avoid
conflict with the existing production applications.
● You must pause the server when backing up database files.