Hitachi VSP User and Reference Guide
2–50
Functional and Operational Characteristics
904 Dynamic
Tiering
Dynamic
Tiering for
Mainframe
By setting the mode to ON or OFF, the number of
pages to be migrated per unit time at tier relocation
is changed.
Mode 904 = ON:
The number of pages to be migrated at tier
relocation is set to up to one page per second.
Mode 904 = OFF (default):
No restriction on the number of pages to be
migrated at tier relocation (existing specification).
Notes:
1. This mode is applied when:
Dynamic Tiering for Mainframe is used
(including multi platforms configuration).
the requirement for response time is
severe.
2. The number of pages to be migrated per unit
time at tier relocation decreases.
OFF .
908 Universal
Replicator
Universal
Replicator for
Mainframe
The mode can change CM capacity allocated to
MPBs with different workloads.
Mode 908 = ON:
The difference in CM allocation capacity among
MPBs with different workload is large.
Mode 908 = OFF (default):
The difference in CM allocation capacity among
MPBs with different workload is small (existing
operation)
Notes:
1. 1. The mode is applied to a CLPR only used for
UR JNLGs.
2. 2. Since CM capacity allocated to MPBs with low
load is small, the performance is affected by a
sudden increase in load.
OFF .
Mode Category Description Default MCU/RCU
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