HP P9000 Replication Manager Software 7.2 Configuration Guide

Memory heap size
Environment
LargeMediumSmall
90,00060,00040,000Mainframe systems
NOTE:
In consideration of response time and memory usage, the maximum number of both open and
mainframe pairs that can be operated on by the Pair Configuration Wizard at one time is 1,000.
With respect to the number of mainframe pairs, the values in the table above are the maximum
number of copy pairs that Device Manager and Business Continuity Manager can manage.
Maximum number of LDEVs
The maximum number of manageable LDEVs depends on storage system specifications. The method
of determining the maximum number of manageable LDEVs differs between open systems and
mainframe systems. For open systems, the maximum number of LDEVs is already set per storage
system. For mainframe systems, the maximum number of LDEVs is based on the total number of LDEVs
in all managed storage systems. The following table shows the maximum number of LDEVs.
Table 14 Maximum number of LDEVs that can be managed
Memory heap size
Environment
LargeMediumSmall
256,00080,00050,000
Open systems (the number of LDEVs per stor-
age system)
200,000120,00080,000
Mainframe systems (the total number of LDEVs
in all managed storage systems)
Heap size in a mixed environment
For open systems and mainframe systems, the memory heap size required to manage copy pairs and
LDEVs is different. When open systems and mainframe systems coexist, use the appropriate formula
below to determine the memory heap size. The formulas convert the number of copy pairs or LDEVs
in a mixed system to an equivalent number for a mainframe system. Use the resulting value with Table
13 or Table 14 to make sure the memory heap size is properly set.
Copy pairs
For copy pairs, use this calculation:
(number-of-copy-pairs-for-open-systems * 6) +
number-of-copy-pairs-for-mainframe-systems
For example, if the number of copy pairs for open systems is 5,000 and the number of copy pairs
for mainframe systems is 20,000, the calculated value is 50,000 ((5,000 * 6) + 20,000). In this
case, the appropriate memory heap size is Medium.
LDEVs
For LDEVs, use this calculation:
Configuration Guide 33