Hitachi Compute Blade 2000, User Manual

Page: 1065 / 1927

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Log
ical
par
titio
ni
ng man
age
r
Shared mode (example)
(1) Dynamic change in scheduling mode
With LPAR manager firmware version 58-3X/78-3X or later, LPAR modes can be
dynamically changed between dedicated and shared modes without deactivating
LPARs.
(a) A logical processor in dedicated mode can be dynamically changed to the one
in shared mode.
(b) A logical processor in shared mode can be dynamically changed to the one in
dedicated mode.
(b)
(a)
Logical
processor
Logical
processor
0 1
0 1
2 2
1
0
0 1
(2) Service ratio
To the LPARs in the Shared Processor Mode, you can set the relative processor
resource allocation rate (called Service Ratio), which represents the ratio of the time
period in which the LPAR actually runs on the physical processors (called Service
Time). The Service Ratio can be specified from 1 to 999.
LPAR manager partitions the performance of the physical processor used in shared
mode in 1 percent units. LPAR manager calculates the relative allocation rate of the
service time with 10-millisecond time-slice accuracy, which equals 1% of a unit
processor time (1 second).
The service ratio can be available only for LPARs in shared mode and not for LPARs
in dedicated mode to which the service ratio cannot be specified.
0 1 2 3
0 1
LPAR1: 2 Ways
LPAR2: 3 Ways
Logical processor
(Processor number)
4 Ways
Physical processor
(Processor number)
0 1 2
Time sharing