HP XP P9500 Storage - Manual (Page 61)

Synchronous Z copy pairs with the HyperSwap attribute can be monitored so that HyperSwap
pairs 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 HyperSwap pairs to be detected even when the primary storage
system status cannot be obtained due to failure or similar occurrence.
Create a script so that a Delta Resync is performed when a HyperSwap is detected.
For details on definitions, see “Defining a 2DC configuration with HyperSwap and Cnt-Ac J Z ”
(page 208) .
The 4x4 configuration
In a 4x4 configuration, consistency is preserved across multiple storage systems for a Continuous
Access Journal Z solution. Because copy group container consistency is preserved, this kind of 4x4
configuration is suitable for large-scale operations.
In a 4x4 configuration, EXCTGs are the units by which consistency is preserved. An EXCTG ID
can be specified for Continuous Access Journal Z copy group containers 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.
Figure 24 (page 62) shows an example of a 4x4 configuration.
Replication products and data center configurations 61