HP StorageWorks Business Copy XP User Guide for the XP10000/XP12000 (T1713-96002, December 2005)

Business Copy XP user guide for the XP10000/XP12000 81
You can estimate the maximum number of migration plans that can be executed concurrently by applying
the previously described conditions to the following equation: , where:
• Σ(α) is the total number of differential tables needed to migrate all volumes.
• (β) is the number of available differential tables.
For example, if you want to create 20 migration plans of OPEN-3 volumes (volume size = 2,403,360 KB),
calculate the number of required differential tables (page 83) and enter this number in the equation:
.
Since this equation is true, you can create 20 migration plans of OPEN-3 volumes.
Calculating differential tables for mainframe volume migration
When you migrate mainframe volumes, use the following equation to calculate the total number of
required differential tables per migration plan:
, where:
• X: The number of cylinders in the volume to be migrated. If the volume is a CVS volume, use the
number of cylinders in the custom volume instead of the default value for the emulation type.
• Y: The number of control cylinders (See Table 26).
• Z: The number of slots that can be managed by a differential table: .
NOTE: Round the result of the calculation up to the nearest whole number.
For example, if a volume has the emulation type 3390-3, and 3339 cylinders, calculate the total number of
differential tables with the following equation: .
When you round 0.81836 up to the nearest whole number, it becomes 1. Therefore, the total number of
differential tables for one migration plan is 1 when emulation type is 3390-3.
The following table shows the number of the control cylinders according to the emulation type.
Σα() β()=
120
×()20=[]13,652 or 30,718≤
Table 26 Control cylinders by emulation type
Emulation type Number of control cylinders
3380-3 7
3380-3A 7
3380-3B 7
3380-3C 7
3380-F 22
3380-K 7
3380-KA 7
3380-KB 7
3380-KC 7
3390-3 6
3390-3A 6
3390-3B 6
3390-3C 6
3390-3R 6
3390-9 25
3390-9A 25
XY+()15× Z÷ Total number of differential tables per migration plan=
1916 32
×
3339 6+()15 1916 32×()÷× 0.81836=