HP P9000 Business Copy for Mainframe Systems User Guide (AV400-96386, October 2011)

The specification of the At-Time Split function using Continuous Access Journal Z and Business
Copy Z follows:
• Business Continuity Manager can be used to perform Split processing. Remote Web Console
and PPRC commands cannot be used to perform Split processing.
• Split processing can be performed on Business Copy Z pairs belonging to Business Copy Z
consistency group.
• One Split processing can be applied to one Business Copy Z consistency group.
• When you apply Split processing, you can select Steady Split or Quick Split.
• Up to three Split processing can be applied to one journal group (the equivalent of three
Business Copy Z consistency groups).
• Up to three T-VOLs of Business Copy Z can be paired to the same S-VOL of the Business Copy
Z pair. Therefore, up to three generations of backup data can be created.
The process for using the At-Time Split function with Continuous Access Journal Z and Business
Copy Z follows. This process backs up data at the specified time without changing the status of
Continuous Access Journal Z pairs to Suspend.
1. Use Business Continuity Manager to register the Split time.
2. The restore journal data of Continuous Access Journal Z before the Split time is restored in the
S-VOL of Continuous Access Journal Z (that is, the S-VOL of Business Copy Z).
3. When Continuous Access Journal Z detects journal data newer than the Split time in the restore
journal, the restore processing gets suspended temporarily. Execute Split processing on the
Business Copy Z pair that is linked to S-VOL of Continuous Access Journal Z.
4. After Business Copy Z finishes the Split processing, Continuous Access Journal Z resumes the
suspended restore processing on restore journal.
Important considerations
Consider the following when you use the At-Time Split function with Continuous Access Journal Z
and Business Copy Z:
• Specify Business Copy Z pairs for all S-VOLs of Continuous Access Journal Z pairs in the
Business Continuity Manager copy group that is used for the At-Time Split function. If Business
Copy Z pairs are specified for only some of the Continuous Access Journal Z S-VOLs, the Split
time may not be registered using Business Continuity Manager. For details about Business
Continuity Manager copy groups, see the HP P9000 for Business Continuity Manager Software
User Guide.
• Continuous Access Journal Z S-VOLs in Business Continuity Manager copy groups used for
the At-Time Split function must belong to the Business Copy Z consistency group containing
the Business Copy Z pairs that are linked. If the Continuous Access Journal Z S-VOLs and the
Business Copy Z pairs belong to different consistency groups, consistency of backup is not
maintained. Also, when Continuous Access Journal Z pairs are registered in multiple journal
groups (see Figure 5 (page 21)), you cannot create consistent backup in Business Copy Z
T-VOLs. If you want to create consistent backup in Business Copy Z T-VOLs, ensure that only
one journal group contains Continuous Access Journal Z pairs.
HP Confidential20 Sharing Business Copy Z volumes