Splitting Consistency Group Pairs With At-Time Split - HP StorageWorks P9000 User Manual

Select a Volume Type to display internal or external volumes. You can select both if
desired.
Select an Attribute to display volumes previously reserved as T-VOLs, or volumes that are
not reserved. You can select both if desired.
1 1. Select the volume to be the T-VOL from the volume list in the Select T-VOL box.
12. Click Set. This places the volume as the T-VOL in the pair list.
13. If creating and splitting pairs, pair additional T-VOLs to a S-VOL as desired.
14. To replace a T-VOL in the volume/pair list, select the pair, select the desired T-VOL in the
Select T-VOL box, and then click Change.
15. To complete the operation, click OK.
The Pair Operation window reappears.
16. Review the information in the Preview list. To change a selection, right-click it, select Modify,
and make your changes.
17. Click Apply to commit the operation to the system.

Splitting consistency group pairs with At-Time Split

Using Business Continuity Manager, you can split all the Business Copy Z pairs in a consistency
group at a specified time. This is done using the At-Time Split feature.
With PPRC, you can split the pairs in a consistency group though without a specified time. See the
instructions in
Prerequisite information
Make sure to change the status of pairs in the same consistency group according to the copy
group.
On registering split time:
◦ When you register the Split time, you can only perform Suspend or Delete pair operations.
Split time is rejected if the Add Pair, Split, or Resync operation is performed. If you want
to perform one of these operations, reset the registration of the Split time.
◦ The specified Split time is reset when power is switched off.
If the Split time is registered, the Split operation is performed when the read/write
◦
request—with a time stamp past the specified Split time—is received. The Split operation
may be delayed if no read/write request is issued. When I/O does not occur, the Split
operation is performed by the storage system timer.
If the Split time is registered, and if there is a pair in the consistency group that cannot
◦
be split completely during the Split operation, the status of this pair remains the same as
before the Split operation.
Before executing At-Time Split a second time, verify that status of all the pairs in the same
consistency group is changed to the status which is specified by the YKEWAIT command. For
detailed information about the YKEWAIT command, see the HP StorageWorks P9000 for
Business Continuity Manager User Guide.
Procedure 6 To perform the At-Time Split operation
1. Define a consistency group for the Business Copy Z pairs that will be split using At-Time Split.
2. Specify the consistency group as a Business Continuity Manager copy group, or register the
split time.
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.
3. Specify the At-Time Split option, then create the pairs.
4. Split the pairs in the consistency group. The pairs will be split simultaneously.
"Pair operations using PPRC" (page 54) for more information.
Split and create pairs 33