1016
12
Log
ical
par
titio
ni
ng man
age
r
LPAR manager modifies the allocation rate from the shared LPAR definition when it
meets the following condition:
If the allocation rate for the calculation per logical processor is less than 1 %,
the service rate is compensated so that the time in which a single logical
processor uses the physical processor becomes 1% (10 milliseconds) of the
unit processor time (1 second).
If the number of logical processors allocated to a single LPAR does not satisfy
the assigned allocation rate, the allocation rate is compensated to the one that
is based on the number of logical processors.
(3) Idle detection
A shared mode LPAR, which is enabling its idle detection and not using much CPU
compared to the allocated rate, can give its processor time to another shared mode
LPAR requiring it. The busy shared mode LPAR that takes over the processor time
can use more processor-time than the allocation rate. As a result, the system can
use CPUs time more efficiently.
Although this function does not work to a dedicated mode LPAR, make sure to set
the default value: Y for correct performance.
Actual service
to LPAR1
Actual service
to LPAR2
LPAR1
workload
decreases.
Actual
service
to
LPAR1
Actual service to LPAR2
LPAR1
workload
increases.
Actual
service
to
LPAR2
Actual service to LPAR1
All-shared processor service
LPAR2
workload
increases.
LPAR2
workload
decreases.
All-shared processor service
All-shared processor service
(4) Processor capping
With the processor capping function on, the shared mode LPAR does not take on
the unused (idle) capacity of other LPARs even if the LPAR requires more
performance than its allocation rate (busy status). Therefore, the LPAR’s
processor-time never uses more processor-time than the allocation rate, even if it is
busy. However, because the LPAR manager allocation rate control allows a
tolerance of 1% for each unit of processor-time, a shared mode LPAR is allocated a
maximum processor-time that is 1% greater than the total service time of the
physical processors assigned to it, and might exceed the allocation rate.
The processor capping can be available only for LPARs in shared mode and not for
LPARs in dedicated mode, to which the service ratio cannot be specified.
Summary of Contents for Compute Blade 2000
Page 1: ...MK 99BDS2K001 16 Hitachi Compute Blade 2000 User s Guide ...
Page 42: ...xlii Precautions for Safe Use Rear View of A1 A2 Chassis ...
Page 43: ...xliii Precautions for Safe Use Rear View of A2 Chassis ...
Page 44: ...xliv Precautions for Safe Use Server Blade ...
Page 45: ...xlv Precautions for Safe Use I O Slot Expansion Unit ...
Page 46: ...xlvi Precautions for Safe Use I O Module ...
Page 47: ...xlvii Precautions for Safe Use AC Power Input Module ...
Page 51: ...li How to Use the Manuals This page is intentionally left blank ...
Page 61: ...10 1 Before Use ...
Page 64: ...13 2 How to Use the System Equipment Rear view of A1 chassis Rear view of A2 chassis ...
Page 93: ...42 2 How to Use the System Equipment ...
Page 123: ...72 3 Connecting the System Equipment and Powering On ...
Page 272: ...221 5 Server Blade Setup 3 Check Del and click Go The following screen appears 4 Click Yes ...
Page 345: ...294 5 Server Blade Setup 12 Click Next The following screen appears ...
Page 351: ...300 5 Server Blade Setup 3 Check Delete and click Go The following screen appears 4 Click Yes ...
Page 426: ...375 5 Server Blade Setup 3 Check Delete and click Go The following screen appears 4 Click Yes ...
Page 430: ...379 5 Server Blade Setup 3 Click Go Hotspare is set to the specified hard disk ...
Page 479: ...428 5 Server Blade Setup ...
Page 717: ...666 6 Management Module Settings Details of a physical partition ...
Page 722: ...671 6 Management Module Settings Server blade details view ...
Page 723: ...672 6 Management Module Settings ...
Page 732: ...681 6 Management Module Settings Management module details view ...
Page 745: ...694 6 Management Module Settings Optional Physical WWN list view ...
Page 748: ...697 6 Management Module Settings Optional Physical WWN initialization view ...
Page 751: ...700 6 Management Module Settings ...
Page 754: ...703 6 Management Module Settings Power status details view ...
Page 767: ...716 6 Management Module Settings ...
Page 768: ...717 6 Management Module Settings ...
Page 769: ...718 6 Management Module Settings ...
Page 814: ...763 6 Management Module Settings Power status trend view partition ...
Page 817: ...766 6 Management Module Settings Access log display view ...
Page 819: ...768 6 Management Module Settings WWN change log display view ...
Page 879: ...828 7 Configuring the LAN Switch Module Link aggregation adding editing screen ...
Page 899: ...848 8 Configuring the 10 Gb DCB Switch Module ...
Page 919: ...868 10 Configuring the Fibre Channel Switch Module ...
Page 1535: ...1484 12 Logical partitioning manager ...
Page 1877: ...1826 14 14 When You Need Help ...
Page 1925: ...16 Glossary ...