The 4X4 Configuration - HP XP P9500 Software User's Manual

Business Continuity Manager provides the following functions to detect a HyperSwap:
The HyperSwap-completion message monitoring function that can monitor for the output of
HyperSwap-completion messages.
The Copy pair status monitoring function.
Business Continuity Manager obtains the copy pair status after a HyperSwap as the SWAPPING
status. This means that changes in the status from DUPLEX to SWAPPING for Continuous Access
Synchronous for Mainframe copy pairs with the HyperSwap attribute can be monitored, so
that HyperSwaps can be detected.
The Volume status monitoring function.
An S-VOL can be directly specified so that status changes from DUPLEX to SWAPPING can
be monitored. This allows HyperSwaps to be detected even when the primary storage system
status cannot be obtained, due to failure or some other reason.
Create a script so that a delta resync is performed when a HyperSwap is detected.
For details on definitions, see
(page 176).

The 4x4 configuration

In a 4x4 configuration, consistency is preserved across multiple storage systems for a Continuous
Access Journal for Mainframe solution. Because copy group container consistency is preserved,
this kind of 4x4 configuration is suitable for large-scale operations.
NOTE: In a 4x4 configuration, units for consistency preservation are called EXCTGs.
An EXCTG ID can be specified for the copy group container of a Continuous Access Journal for
Mainframe, so that the consistency of journal groups on multiple storage systems can be preserved.
An EXCTG ID can also be specified to preserve consistency between journal groups within copy
group containers in a single storage system.
50 Business Continuity Manager with replication products
"Defining a 2DC configuration with HyperSwap and Cnt-Ac J Z "