Sharing volumes with other p9500 software volumes – HP XP P9500 Storage User Manual
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Sharing volumes with other P9500 software volumes
Continuous Access Journal volumes can be shared with other product volumes. Sharing pair volumes
enhances replication solutions, for example, when Continuous Access Journal and Continuous
Access Synchronous or Business Copy volumes are shared.
For planning information, see the following:
•
•
“Configurations with Continuous Access Synchronous” (page 141)
•
“Configurations with Business Copy” (page 154)
Planning Cnt Ac-J in multiple P9500s using a consistency group
Copy operations can be run simultaneously on multiple Cnt Ac-J pairs residing in multiple primary
and multiple secondary systems. This is done by placing journals in the primary systems in a RAID
Manager consistency group. Data update order in copy processing is guaranteed to the secondary
systems.
With multiple systems, the journals in the paired secondary systems are automatically placed in
the consistency group.
With multiple systems, you can also place the journals from both OPEN and mainframe systems
in the same RAID Manager consistency group. When this configuration is used, Cnt Ac-J Z journals
cannot be placed in an EXCTG.
In addition, Continuous Access Journal volumes in multiple systems can be shared with other Cnt
Ac-J pairs and with Continuous Access Synchronous pairs. See the following for more information:
•
“3 Cnt Ac-J data-center configurations” (page 126)
•
“Configurations with Continuous Access Synchronous” (page 141)
You can register up to four journals in a single consistency group.
Any combination of primary and secondary system journals can be used. For example, you can
include journals from four primary systems and four secondary systems, two primary systems and
one secondary system, and so on.
An example configuration is shown in the following figure.
When data is sent to the secondary systems, the systems check time stamps, which are added
when data is written by the hosts to the P-VOLs. The secondary systems then restore the data to the
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Planning volumes, P9500 systems