Copy pair operations common to all copy types, Copy pair operations for bc z and tca – HP XP Racks User Manual
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is performed, if there is at least one copy pair subject to processing in the processing unit, the copy
pairs in the processing unit are subject to processing. However, processing is performed by volume
if the DEVN, VOLUNIT, or ERRCHK parameter is specified.
indicates when batch processing is performed.
Table 102 When Batch Processing is Performed
Cnt Ac-J Z
TCA
Cnt Ac-S Z
BC Z
Command name
With C/T
Without C/T
With C/T
Without C/T
No
No
No
No
No
No
YKDELETE
Yes
Yes
Yes
Yes
Yes
Yes
YKEWAIT
No
No
No
No
No
No
YKMAKE
No
No
No
No
No
No
YKQRYDEV
No
No
No
No
No
No
YKQUERY
No
No
No
No
N/A
N/A
YKRECVER
Yes
Yes
Yes
No
Yes
No
YKRESYNC
Yes
Yes
N/A
N/A
N/A
N/A
YKSTATS
Yes
Yes
Yes
No
Yes
Yes
YKSUSPND
Legend:
With C/T: Copy group for which a C/T group ID is specified.
Without C/T: Copy group for which no C/T group ID is specified.
Yes: Processing is performed in batch.
No: Processing is performed for each volume.
N/A: Not applicable.
Copy Pair Operations Common to All Copy Types
•
HP recommends that you execute the YKSUSPND and YKDELETE commands when the status
of the P-VOL or S-VOL in a copy group is DUPLEX or SUSPER.
•
Acquire the latest volume status with the YKQUERY or YKEWAIT command before performing
each operation for a copy pair by using CLI commands.
•
Business Continuity Manager does not support copy pair operations for copy pairs created
by a different product (for example, Remote Web Console). Business Continuity Manager also
does not support copy pair operations on copy pairs managed by a different product even if
the copy pairs were created in Business Continuity Manager. For these reasons, always use
Business Continuity Manager to create and perform operations on copy pairs that you will
manage using Business Continuity Manager.
Copy Pair Operations for BC Z and TCA
•
If the primary site is not updated after you set the suspend time by using the YKSUSPND
command with the ATTIME parameter, the time at which the copy pair is suspended might
differ from the specified time. However, the data on the secondary site will match that of the
primary site at the specified time for the copy pair to be suspended.
•
If you execute the YKRESYNC command after suspending the volume with the YKSUSPND
command specifying the ATTIME parameter, Business Continuity Manager automatically
deletes scheduled suspend information. However, when you execute the YKRESYNC command
specifying the DEVN or VOLUNIT parameter, Business Continuity Manager does not delete
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Using Business Continuity Manager