HP StorageWorks XP Remote Web Console Software - Manual (Page 252)

1. Allow direct control of host impact metrics using a methodology called Load Balancing. Load
balancing allows management of the thresholds for inducing host delay and for the degree
of induced delay.
2. Use ShadowImage for Mainframe to provide a tertiary Point-in-Time (PiT) copy in support of
DR/BC requirements. The PiT copy may be manually controlled at specified times or be
automated on a continuing interval basis using HP NanoCopy. With this practice, induced
host delay may be minimized, and in some cases removed, without impacting a DR/BC
solution. This solution allows the tertiary copy to be used for testing and/or backup.
3. Use TCA as a data replication application only. All induced delay may be removed at user
discretion, and the DR/BC solution will remain usable as long as the sustained write update
rate and the ability of the network to service the write updates does not over-commit the
availability of cache/sidefile. Suspension of the remote copy environment in this configuration
is probable dependent upon write update demand and network capability.
252 TrueCopy for Mainframe Load Balancing and Sidefile Management and Control