2Dc Configuration With Hyperswap And Continuous Access Journal - HP XP P9500 Software User's Manual

Figure 17 Example of a Delta Resync configuration (before a Delta Resync is performed)
Figure 18 Example of a Delta Resync configuration (after a Delta Resync is performed)

2DC Configuration with HyperSwap and Continuous Access Journal

A 2DC configuration with HyperSwap and Continuous Access Journal for Mainframe can continue
operating, even after a HyperSwap is performed.
The HyperSwap functionality reverses the relationship between a P-VOL and an S-VOL by using
TPC-R, when the primary storage system and local storage system are connected to the same host
and a failure occurs during access to the primary storage system. HyperSwap enables the I/O
destination volume to be switched during a primary storage system failure or maintenance, without
stopping operations.
With this configuration, delta resyncs are executed after a HyperSwap, allowing operations to
restart temporarily under a 2DC configuration after the HyperSwap with very little downtime.
48 Business Continuity Manager with replication products