HP XP Business Copy Software User Manual
Page 79
1.
Define the SIz pairs in the same CTG.
2.
Specify the CTG as the copy group of the XP for Business Continuity Manager Software™, or
register the split time.
3.
When you specify the copy group, select the split type; Quick Split or Steady Split.
When you register the split time, the split type will be Quick Split.
4.
Perform the pair create operation.
5.
Perform the pair split operation on the SIz pairs that are created for At-Time Split function.
The At-Time Split option is enabled, and data in all S-VOLs in the same CTG is created in the
corresponding T-VOLs at the time when the pairsplit request is received by the storage system.
CAUTION:
On executing the At-Time Split function:
•
Change the status of pairs in the same CTG according to the copy group.
•
If you are going to execute the At-Time Split function successively, before you execute the
function for the second time, verify that status of all the pairs in the same CTG is changed to
the status which is specified by the YKEWAIT command. For detailed information about the
YKEWAIT command, see the HP StorageWorks XP for Business Continuity Manager Software
Messages.
If you do not follow the above mentioned caution, the data in the S-VOL when the Split operation
is performed by the At-Time Split function may not be copied to the T-VOL.
On registering the split time:
•
For the pairs in the CTG to which you registered the Split time, you can only perform Suspend
Pair operations or Delete Pair operations. If you perform Add Pair, Split or Pair Resync
operation, registration of the Split time will be rejected. To perform Add Pair, Split or Pair
Resync operation, you must first reset the registration of the Split time.
•
The specified Split time will be reset by switching off the power supply.
•
If the Split time is registered, the Split operation is performed at the time of reception of the
read/write request with a time stamp that has passed the time specified as the Split time. The
Split operation may be delayed in case no read/write request is issued and the Split operation,
as a result, is performed as a result of timeout of the storage system timer.
•
If the Split time is registered, and if there is a pair in the CTG that cannot be split completely
during the Split operation, the status of this pair will remain the same as before the Split
operation.
Using PPRC Commands to Split, Resynchronize, and Delete Pairs in a CTG
By using a PPRC command, you can split, resynchronize, and delete all SIz pairs in the same CTG
at once. For specifications of CTGs, see
“Performing At-Time Split Operation (Multiple Pair Splitting)”
. For details on how to set, reset, and reference CTGs, see
.
The following explains how to use PPRC commands to manipulate CTGs:
•
Preparation for CTG
Start up ShadowImage for Mainframe from Remote Web Console, and reserve a CTG.
1.
2.
Create SIz pairs by using the PPRC CESTPAIR command or the ICKDSF PPRCOPY ESTPAIR
command.
3.
In the CTG dialog box, make sure that SIz pairs have been made in the correct CTG.
•
To split all pairs in the same CTG
Using PPRC Commands to Split, Resynchronize, and Delete Pairs in a CTG
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