HP P9000 Continuous Access Synchronous for Mainframe Systems User Guide (AV400-96398, October 2011)

Priority set for initial copy operations and scheduling order
For performing more initial copy operations than the setting value of the Maximum Initial Copy
Activities set on the System Option dialog box, the scheduling order (Priority) can be set for the
initial copy operations to be performed. This section explains the assignment of the scheduling
order of initial copy operations in cases where two sets of multiple initial copy operations are
performed.
An example is described in which 4 Cnt Ac-S Z pairs are created at the same time in cases where
the setting value of the Maximum Initial Copy Activities is 2. The Priority which is set for the M-VOLs
of Cnt Ac-S Z pairs is shown in the following table.
Table 14 Priority set for M-VOLs for which initial copy operation is performed
Value set for PriorityM-VOL
2LDEV 00
3LDEV 01
1LDEV 02
4LDEV 03
The order of starting initial copy and the Priority which is set for the M-VOLs are shown in the
following table.
Table 15 Relationship between order of starting initial copy and priority set for M-VOLs
Value set for PriorityM-VOLOrder of starting initial copy
1LDEV 021
2LDEV 002
3LDEV 013
4LDEV 034
In this case, as the setting value of the Maximum Initial Copy Activities is 2, initial copy operations
for LDEV 02 and LDEV 00 are started. If either one of the initial copy operations for LDEV 02 and
LDEV 00 is completed, the initial copy for LDEV 01 is started.
The next example explains the assignment of the scheduling order of initial copy operations in
cases where initial copy is already performed and two Cnt Ac-S Z pairs are newly added. The
M-VOLs of the Cnt Ac-S Z pairs to be newly added and the Priority are shown in the following
table.
Table 16 Priority set for M-VOLs of Cnt Ac-S Z pairs to be added
Value set for PriorityM-VOL
2LDEV 10
1LDEV 11
If initial copy is already started and if any initial copy is newly added, the additional initial copy
is started after the previously performed initial copy is completed. The priority of all the initial copy
operations being performed is shown in the following table.
Planning volume pairs 33