Hitachi CB 520A A1 User manual

Hitachi Compute Blade 500 Series

Logical partitioning manager User's Guide

MK-91CB500068-27

Document Organization

Product Version

Getting Help

Contents

No part of this publication may be reproduced or transmitted in any form or by any means,

electronic or mechanical, including photocopying and recording, or stored in a database or retrieval

system for any purpose without the express written permission of Hitachi, Ltd.

Hitachi, Ltd., reserves the right to make changes to this document at any time without notice and

assumes no responsibility for its use. This document contains the most current information available

at the time of publication. When new or revised information becomes available, this entire

document will be updated and distributed to all registered users.

Some of the features described in this document might not be currently available. Refer to the most

recent product announcement for information about feature and product availability, or contact

Hitachi Data Systems Corporation at

https://portal.hds.com.

Notice: Hitachi, Ltd., products and services can be ordered only under the terms and conditions of

the applicable Hitachi Data Systems Corporation agreements. The use of Hitachi, Ltd., products is

governed by the terms of your agreements with Hitachi Data Systems Corporation.

Hitachi is a registered trademark of Hitachi, Ltd., in the United States and other countries. Hitachi

Data Systems is a registered trademark and service mark of Hitachi, Ltd., in the United States and

other countries.

Archivas, Essential NAS Platform, HiCommand, Hi-Track, ShadowImage, Tagmaserve, Tagmasoft,

Tagmasolve, Tagmastore, TrueCopy, Universal Star Network, and Universal Storage Platform are

registered trademarks of Hitachi Data Systems Corporation.

AIX, AS/400, DB2, Domino, DS6000, DS8000, Enterprise Storage Server, ESCON, FICON,

FlashCopy, IBM, Lotus, MVS, OS/390, RS6000, S/390, System z9, System z10, Tivoli, VM/ESA, z/

OS, z9, z10, zSeries, z/VM, and z/VSE are registered trademarks or trademarks of International

Business Machines Corporation.

All other trademarks, service marks, and company names in this document or website are

properties of their respective owners.

Microsoft product screen shots are reprinted with permission from Microsoft Corporation.

ii

Hitachi Compute Blade 500 Series Logical partitioning manager User's Guide

Contents

Preface ............................................................................................... ix

Intended Audience .................................................................................................. x

Product Version ...................................................................................................... x

Release Notes ........................................................................................................ x

Referenced Documents ........................................................................................... x

Document Organization .......................................................................................... xi

Document conventions .......................................................................................... xii

Convention for storage capacity values .................................................................. xiii

Getting help ......................................................................................................... xiii

Comments ........................................................................................................... xiii

1 LPAR manager Functions ................................................................... 1-1

LPAR manager Overview ...................................................................................... 1-2

Logical Partitioning .............................................................................................. 1-3

Logical Partitioning of Processors .......................................................................... 1-4

Scheduling mode dynamically change ............................................................. 1-5

Service Ratio ................................................................................................. 1-6

Idle Detection ............................................................................................... 1-7

Processor Capping ......................................................................................... 1-8

Processor Group ............................................................................................ 1-9

Hyper Threading ......................................................................................... 1-10

PRTE .......................................................................................................... 1-12

Logical Partitioning of Memory ............................................................................ 1-13

Guest NUMA ................................................................................................ 1-15

L3 cache allocation functionality ................................................................... 1-18

Logical Partitioning of PCI Devices ...................................................................... 1-19

NIC (Network Interface Card) ............................................................................. 1-22

Management Path ....................................................................................... 1-32

SR-IOV ....................................................................................................... 1-40

FCoE .......................................................................................................... 1-43

Port Multiple Assignment .............................................................................. 1-44

Port Separate Assignment ............................................................................ 1-44

TagVLAN ..................................................................................................... 1-45

Teaming ..................................................................................................... 1-54

Promiscuous Mode ....................................................................................... 1-55

Packet Filtering of Inter-LPAR ....................................................................... 1-60

iii

Hitachi Compute Blade 500 Series Logical partitioning manager User's Guide

FC (Fibre Channel) ............................................................................................. 1-60

HBA-core dedicated mode ............................................................................ 1-62

USB/KVM .......................................................................................................... 1-65

2 System Operation .............................................................................. 2-1

Web Console ....................................................................................................... 2-2

HCSM ................................................................................................................. 2-2

Server Management ............................................................................................. 2-2

SC/BSM ........................................................................................................ 2-2

SC/DPM ........................................................................................................ 2-2

HVM Navigator .................................................................................................... 2-3

LPAR Configuration ........................................................................................ 2-3

Monitoring .................................................................................................... 2-3

Viewer .......................................................................................................... 2-3

Migration ...................................................................................................... 2-3

Virtual COM Console ............................................................................................ 2-4

Logical VGA Snapshot ........................................................................................ 2-10

Time Adjustment ............................................................................................... 2-11

Power Saving .................................................................................................... 2-16

System Idle Loop ......................................................................................... 2-16

Power Capping Function ............................................................................... 2-16

Transfer ............................................................................................................ 2-17

Transfer to LPAR manager environment from Basic environment .................... 2-17

Transfer to Basic environment from LPAR manager environment .................... 2-18

IPv6 Setting for LP IP Addresses ......................................................................... 2-18

LP communication settings ................................................................................. 2-20

DNS .................................................................................................................. 2-20

Performance tuning options ................................................................................ 2-21

3 High Reliability Functions ................................................................... 3-1

Redundancy ........................................................................................................ 3-2

Redundancy of Power Supply ......................................................................... 3-2

Redundancy of Management Module .............................................................. 3-2

Redundancy of LAN switch / FC switch ............................................................ 3-3

RAID configuration and duplex controllers ....................................................... 3-3

N+M Cold Standby .............................................................................................. 3-3

Microsoft Cluster Service/Microsoft Failover Cluster ................................................ 3-7

UPS .................................................................................................................... 3-9

Role-Based Access Control .................................................................................. 3-11

User types .................................................................................................. 3-11

Role types ................................................................................................... 3-12

Assigning roles ............................................................................................ 3-12

Access permissions ...................................................................................... 3-13

Changing access permissions ........................................................................ 3-15

LPAR manager operations from the management module ............................... 3-15

Configuration example ................................................................................. 3-17

Notes on access permissions ........................................................................ 3-17

User Authentication ........................................................................................... 3-18

Scope of support ......................................................................................... 3-19

User authentication settings ......................................................................... 3-19

Specify the method of user authentication ..................................................... 3-20

iv

Hitachi Compute Blade 500 Series Logical partitioning manager User's Guide

Local authentication ..................................................................................... 3-20

LDAP authentication .................................................................................... 3-24

RADIUS authentication ................................................................................. 3-26

User authentication logs ............................................................................... 3-28

Audit log ........................................................................................................... 3-28

Scope of support ......................................................................................... 3-28

Audit log settings ......................................................................................... 3-29

Audit log format .......................................................................................... 3-29

LPAR manager Security ...................................................................................... 3-32

Certificates in LPAR manager ........................................................................ 3-32

Security for functions and tools that use a management network .................... 3-37

4 Maintenance Functions ...................................................................... 4-1

Guest Memory Dump Collection Command ............................................................ 4-2

LPAR manager Dump Collection Command ............................................................ 4-6

Backup Functions ................................................................................................ 4-8

Backup of System Area .................................................................................. 4-8

Backup of Data Area .................................................................................... 4-10

Backup of LPAR manager ............................................................................. 4-12

LPAR manager Firmware Upgrade / Update ......................................................... 4-13

Relation between server blade and LPAR manager firmware ........................... 4-13

Selecting the bank of LPAR manager firmware ............................................... 4-14

LPAR Migration .................................................................................................. 4-16

Safe mode ......................................................................................................... 4-17

5 Setup of LPAR manager ..................................................................... 5-1

Setup Overview ................................................................................................... 5-2

Setup of Terminal Software .................................................................................. 5-4

Connects LPAR manager Screen ........................................................................... 5-6

LPAR manager Settings ........................................................................................ 5-7

Creating LPAR ................................................................................................... 5-10

Adding LPAR ............................................................................................... 5-10

Configuration of Processor ........................................................................... 5-12

Configuration of Memory .............................................................................. 5-16

Configuration of PCI Device .......................................................................... 5-18

Assign VNICs (Virtual NICs) to LPARs ............................................................ 5-26

Assign Shared FCs to LPARs ......................................................................... 5-28

Save Configuration Changed on LPAR manager Screen ......................................... 5-30

Boot the Guest OS ............................................................................................. 5-32

Activating LPAR ........................................................................................... 5-32

Boot order setting .............................................................................................. 5-33

Boot setting ................................................................................................ 5-33

Creating boot option .................................................................................... 5-40

Changing Boot order .................................................................................... 5-52

Deleting Boot order ..................................................................................... 5-61

Display settings for Guest OS .............................................................................. 5-63

Display settings for Windows ........................................................................ 5-64

Display settings for Linux ............................................................................. 5-64

Deactivation of LPAR .......................................................................................... 5-65

Shutdown of Guest OS ................................................................................. 5-65

Deactivation of LPAR ................................................................................... 5-65

v

Hitachi Compute Blade 500 Series Logical partitioning manager User's Guide

Termination of LPAR manager ............................................................................ 5-67

Shutting down of LPAR manager .................................................................. 5-67

6 LPAR manager backup ....................................................................... 6-1

LPAR manager backup files .................................................................................. 6-2

Operations required creating backup files ........................................................ 6-2

Save/backup/restore tools for LP configuration ................................................ 6-3

Backing up the LPAR manager configuration as of a time before device

isolation ........................................................................................................ 6-3

Creating backup files ........................................................................................... 6-4

Restoring backup files .......................................................................................... 6-5

7 Operation by LPAR manager Screen .................................................... 7-1

LPAR manager Key Operations ............................................................................. 7-2

Summary of LPAR manager Screen ....................................................................... 7-4

Common items for all screens ........................................................................ 7-6

LPAR manager Menu ..................................................................................... 7-6

Logical Partition Configuration ........................................................................ 7-9

Logical Processor Configuration .................................................................... 7-28

Physical Processor Configuration ................................................................... 7-32

PCI Device Information ................................................................................ 7-35

PCI Device Assignment ................................................................................ 7-39

Virtual NIC Assignment ................................................................................ 7-44

Shared FC Assignment ................................................................................. 7-56

Allocated FC Information .............................................................................. 7-61

System Configuration ................................................................................... 7-63

System Service State ................................................................................... 7-76

Date and Time ............................................................................................ 7-81

LP Options ................................................................................................ 7-105

LPAR Usage ............................................................................................... 7-118

Front Panel ............................................................................................... 7-124

LP system logs .......................................................................................... 7-128

Firmware Version Information .................................................................... 7-131

8 LPAR manager Dump Collection .......................................................... 8-1

Check the LPAR manager Dump ........................................................................... 8-2

Collects the LPAR manager Dump ......................................................................... 8-2

Exports LPAR manager Dump ............................................................................... 8-4

9 Messages .......................................................................................... 9-1

LPAR manager Boot Messages .............................................................................. 9-2

LPAR manager Screen messages ........................................................................ 9-10

LP system logs Screen Messages ......................................................................... 9-27

Error Level .................................................................................................. 9-27

Warn Level ................................................................................................. 9-37

Info Level ................................................................................................... 9-45

Audit log messages ............................................................................................ 9-56

Notation used in audit log messages ............................................................. 9-57

List of audit log messages ............................................................................ 9-57

HCSM Alert Messages ......................................................................................... 9-94

vi

Hitachi Compute Blade 500 Series Logical partitioning manager User's Guide

10 Notes ............................................................................................ 10-1

Note for the LPAR manager Setup ....................................................................... 10-2

Restriction of SMP configuration ................................................................... 10-2

Setting FC Switch ........................................................................................ 10-3

Requirements for LPAR manager Startup ....................................................... 10-3

Notes on temporary LP licenses .................................................................... 10-4

Maximum Resolution .................................................................................... 10-5

Note for the LPAR manager operation ................................................................. 10-5

LPAR manager boot up ................................................................................ 10-5

LPAR Memory Fragmentation ....................................................................... 10-5

Memory allocation to LPARs ......................................................................... 10-8

PCI Device Assignment ................................................................................ 10-8

Using inter-LPAR communication in a redundant network configuration ........... 10-9

Displaying shared NIC/virtual NIC by ethtool command ................................ 10-11

Use Dedicated NIC ..................................................................................... 10-11

Use Shared NIC ......................................................................................... 10-11

Availability of Shared FC ............................................................................. 10-12

Timeout in Saving Configuration ................................................................. 10-12

Boot Option Settings .................................................................................. 10-13

LPAR manager Shutdown ........................................................................... 10-13

Notes for System Management ......................................................................... 10-13

Restriction when Dual-core CPU is installed in CB 520H A1/B1/B2/B3/B4 model 10-13

Restriction when TPM (Trusted Platform Module) is installed ......................... 10-14

Isolation/degradation for CPU, memory, or PCI device .................................. 10-14

CPU core degradation ................................................................................ 10-14

Restrictions on use of Onboard LAN ............................................................ 10-14

Restrictions on use of Emulex 10Gb NIC ...................................................... 10-15

Restrictions of the numbers of NIC ports assignment for Windows ................ 10-16

Multicast communication errors .................................................................. 10-18

Performance Slowdown on the Management Path ........................................ 10-19

Expansion of VNIC System No .................................................................... 10-20

Remote Console Function ........................................................................... 10-20

NETM/Remote Control ................................................................................ 10-21

Server Conductor/Blade Server Manager ..................................................... 10-21

Server Conductor/Deployment Manager ...................................................... 10-22

Server Conductor/Advanced Agent .............................................................. 10-22

Power Capping .......................................................................................... 10-22

A Setting Item Catalogue ...................................................................... A-1

Server Blade which LPAR manager supports .......................................................... A-2

PCI device which LPAR manager supports ............................................................. A-2

OSs which LPAR manager supports ....................................................................... A-4

Functions which LPAR manager supports .............................................................. A-9

SR-IOV functions which LPAR manager supports .................................................. A-17

LPAR manager licenses ...................................................................................... A-23

Differences in supported items depending on the guest OSs ................................. A-24

B Setting Item List ............................................................................... B-1

LPAR manager Setting Items ................................................................................ B-2

EFI Driver Setting Items ...................................................................................... B-8

vii

Hitachi Compute Blade 500 Series Logical partitioning manager User's Guide

C Console Types .................................................................................. C-1

Console Types ..................................................................................................... C-2

D LPAR manager use Port numbers ....................................................... D-1

LPAR manager use Port numbers ......................................................................... D-2

E System Configuration ........................................................................ E-1

Recommended LPAR manager Configuration (SAN Boot) ........................................ E-2

F HvmGetPerf Command ....................................................................... F-1

HvmGetPerf Command ......................................................................................... F-2

G Software License Information ............................................................ G-1

Software License Information ............................................................................... G-2

viii

Hitachi Compute Blade 500 Series Logical partitioning manager User's Guide

Preface

This document describes how to use the Compute Blade 500. (The

introduction of the preface states the purpose of the document, briefly

introduces the subject of the document, and provides links to the sections of

the preface.)

Notice: The use of Compute Blade 500 and all other Hitachi Data Systems

products is governed by the terms of your agreement(s) with Hitachi Data

Systems.

□

Intended Audience

□

Product Version

□

Release Notes

□

Referenced Documents

□

Document Organization

□

Document conventions

□

Convention for storage capacity values

□

Getting help

□

Comments

Preface

ix

Hitachi Compute Blade 500 Series Logical partitioning manager User's Guide

Intended Audience

This document is intended for the personnel who are involved in planning,

managing, and performing the tasks to prepare your site for Compute Blade

installation and to install the same.

This document assumes the following:

• The reader has a background in hardware installation of computer

systems.

• The reader is familiar with the location where the Compute Blade will be

installed, including knowledge of physical characteristics, power systems

and specifications, and environmental specifications.

Product Version

This document revision applies to Logical partitioning manager 02-62.

Release Notes

Read the release notes before installing and using this product. They may

contain requirements or restrictions that are not fully described in this

document or updates or corrections to this document.

Referenced Documents

• Hitachi Compute Blade 500 Series Server Blade Setup Guide

• Hitachi Compute Blade 500 Series Management Module Setup Guide

• Hitachi Compute Blade 500 Series Web Console User's Guide

• Hitachi Compute Blade 500 Series EFI User's Guide

• Hitachi Compute Blade Series Hitachi Compute Rack Series OS

Installation Guide for Windows Server

• Hitachi Compute Blade Series OS Installation Guide for Red Hat Enterprise

Linux

• Hitachi Compute Blade Emulex Adapter User's Guide for Driver

• Hitachi Compute Blade Emulex Adapter User's Guide for Hardware

• Server installation and monitoring tool OS Setup Guide

• Hitachi Gigabit Fibre Channel Adapter USER'S GUIDE (BIOS/EFI Edition)

• Hitachi Compute Blade HVM Navigator User's Guide - Getting Started

• Hitachi Compute Blade HVM Navigator Installation Manual

• Hitachi Compute Blade HVM Navigator User's Guide - LPAR Configuration

• Hitachi Compute Blade HVM Navigator User's Guide - Monitoring

• Hitachi Compute Blade HVM Navigator User's Guide - Viewer

• Hitachi Compute Blade HVM Navigator User's Guide - Migration

x

Preface

Hitachi Compute Blade 500 Series Logical partitioning manager User's Guide

• Hitachi Compute Blade HVM Navigator User's Guide - Operation Quick

Reference

• Hitachi Compute Blade LPAR Migration Guide

• Hitachi Compute Blade Logical VGA SnapShot

• HVM Management Command (HvmSh) Operation Guide

• Hitachi Command Suite Compute Systems Manager User Guide

Document Organization

The table below provides an overview of the contents and organization of this

document. Click the chapter title in the left column to go to that chapter. The

first page of each chapter provides links to the sections in that chapter.

Chapter Description

Chapter 1, LPAR manager Functions Explains the basic functions of LPAR

manager.

Chapter 2, System Operation Describes the system operation.

Chapter 3, High Reliability Functions Explains High Reliability Functions.

Chapter 4, Maintenance Functions Explains Maintenance Functions.

Chapter 5, Setup of LPAR manager Explains setup of LPAR manager by using

the LPAR manager screen. Contents on the

screens might be changed depend on the

version.

Chapter 6, LPAR manager backup Explains LPAR manager backup.

Chapter 7, Operation by LPAR manager

Screen

Explains LPAR manager operation by using

the LPAR manager screen.

Chapter 8, LPAR manager Dump Collection Explain the over view of LPAR manager at

this chapter.

Chapter 9, Messages Describes the Displaying Message.

Chapter 10, Notes Explains Notes for LPAR manager.

For notes for the system unit, see each

User's Guides.

Appendix A, Setting Item Catalogue Setting Item Catalogue

Appendix B, Setting Item List Setting Item List

Appendix C, Console Types Console Types

Appendix D, LPAR manager use Port

numbers

LPAR manager use port numbers

Appendix E, System Configuration System Configuration

Appendix F, HvmGetPerf Command HVMGetPerf Command

Appendix G, Software License Information Software License Information

Preface

xi

Hitachi Compute Blade 500 Series Logical partitioning manager User's Guide

Document conventions

The term "Compute Blade" see all the models of the Compute Blade, unless

otherwise noted.

The Hitachi Virtualization Manager (HVM) name has been changed to Hitachi

logical partitioning manager (LPAR manager, or LP). If you are using HVM

based logical partitioning feature, substitute references to Hitachi logical

partitioning manager (LPAR manager, or LP) with HVM.

This document uses the following typographic conventions:

Convention Description

Regular text bold In text: keyboard key, parameter name, property name,

hardware labels, hardware button, hardware switch.

In a procedure: user interface item

Italic Variable, emphasis, reference to document title, called-out

term

screen/code Command name and option, drive name, file name, folder

name, directory name, code, file content, system and

application output, user input

< > angled brackets Variable (used when italic is not enough to identify variable).

[ ] (square bracket) Optional values

{ } braces Required or expected value

| vertical bar Choice between two or more options or arguments

This document uses the following icons to draw attention to information:

Icon Meaning Description

WARNING This indicates the presence of a potential risk that

might cause death or severe injury.

CAUTION This indicates the presence of a potential risk that

might cause relatively mild or moderate injury.

NOTICE This indicates a risk of severe damage to the

equipment or damage to nearby items.

Note This indicates notes not directly related to injury

or severe damage to equipment.

Tip This indicates advice on how to make the best use

of the equipment.

The following table shows abbreviations of logical partitioning manager and

logical partition.

Term Abbreviation

logical partitioning manager LPAR manager or LP

xii

Preface

Hitachi Compute Blade 500 Series Logical partitioning manager User's Guide

Term Abbreviation

logical partition LPAR

Convention for storage capacity values

Physical storage capacity values (for example, disk drive capacity) are

calculated based on the following values:

Physical capacity unit Value

1 kilobyte (KB)

1,000 (10

3

) bytes

1 megabyte (MB)

1,000 KB or 1,000

2

bytes

1 gigabyte (GB)

1,000 MB or 1,000

3

bytes

1 terabyte (TB)

1,000 GB or 1,000

4

bytes

1 petabyte (PB)

1,000 TB or 1,000

5

bytes

1 exabyte (EB)

1,000 PB or 1,000

6

bytes

Logical storage capacity values (for example, logical device capacity) are

calculated based on the following values:

Logical capacity unit Value

1 block 512 bytes

1 KB

1,024 (2

10

) bytes

1 MB

1,024 KB or 1,024

2

bytes

1 GB

1,024 MB or 1,024

3

bytes

1 TB

1,024 GB or 1,024

4

bytes

1 PB

1,024 TB or 1,024

5

bytes

1 EB

1,024 PB or 1,024

6

bytes

Getting help

The Hitachi Data Systems customer support staff is available 24 hours a day,

seven days a week. If you need technical support, log on to the Hitachi Data

Systems Portal for contact information:

https://portal.hds.com.

Comments

Please send us your comments on this document: [email protected].

Include the document title and number including the revision level (for

Preface

xiii

Hitachi Compute Blade 500 Series Logical partitioning manager User's Guide

example, -07), and refer to specific sections and paragraphs whenever

possible. All comments become the property of Hitachi Data Systems

Corporation.

Thank you!

xiv

Preface

Hitachi Compute Blade 500 Series Logical partitioning manager User's Guide

1

LPAR manager Functions

This chapter explains the basic functions of LPAR manager.

□

LPAR manager Overview

□

Logical Partitioning

□

Logical Partitioning of Processors

□

Logical Partitioning of Memory

□

Logical Partitioning of PCI Devices

□

NIC (Network Interface Card)

□

FC (Fibre Channel)

□

USB/KVM

LPAR manager Functions

1-1

Hitachi Compute Blade 500 Series Logical partitioning manager User's Guide

LPAR manager Overview

LPAR manager logically partitions the physical resources of one server blade

to create multiple server environments, each of which can operate

independently.

Each of the server environments constructed in this way from partitioned

physical resources is called an LPAR (Logical PARtition). It is possible to run a

different operating system on each LPAR simultaneously.

The operating system on an LPAR is called a guest OS. Each LPAR operates as

a completely independent and isolated server environment, and the guest OS

running on an LPAR is not affected by other LPARs.

The mode in which a server blade is logically partitioned to allow the

operation of multiple LPARs is called the LP mode. The conventional mode of

operating a server blade without partitioning is called the Basic mode.

Unless explicitly specified, the terms "physical" and "logical" are used in this

chapter as defined in the table below.

Table 1-1 Physical and Logical resources

Term Description

Physical Indicates the resources that actually exist in the system. "Physical" is

sometimes omitted, except where this would cause confusion.

Logical Indicates the logical resources that exist on an LPAR or for software on

LPARs. Thus, there may or may not exist an actual resource for each logical

resource.

An image when the system is booted in the LP mode is as follows:

Figure 1-1 System Activation in the LP mode

In addition, in this chapter:

• Symbols embraced by square brackets [ ] indicate keys on the keyboard.

• If two keys are joined by a "+", such as "A + B", it means the two keys

are to be pressed together

1-2

LPAR manager Functions

Hitachi Compute Blade 500 Series Logical partitioning manager User's Guide

Logical Partitioning

Dedicated Resources and Shared Resources

Although the LP mode makes it possible to logically partition the hardware

resources of a server blade, the method of logical partitioning varies

depending on the hardware resource.

Some types of logical partitioning are shown in the table below.

Table 1-2 Type of Logical Partitioning

Term Description

Typical

Hardware

Resources

Dedicated The LPAR to which a hardware resource

has been allocated dedicatedly uses the

hardware resource and other LPARs

cannot use the hardware resource.

To switch the LPAR that can use

resources, make sure to shut down the

LPAR once to change the configuration

definition.

Processors

Memories

PCI devices

Shared Time-shared The particular LPARs to which a hardware

resource has been allocated timeshare

the hardware resource.

LPAR manager keeps switching LPARs

that can use the device at very short time

intervals.

Processors

PCI devices

Exclusive-

shared

One of the particular LPARs to which a

hardware resource has been allocated

exclusively uses the hardware resource.

The LPAR using the resource can be

switched dynamically.

Serial ports

USB devices

Remote

Console

Figure 1-2 Logical Partitioning of Hardware Resources

LPAR manager Functions

1-3

Hitachi Compute Blade 500 Series Logical partitioning manager User's Guide

Logical Partitioning of Processors

The method of logically dividing the physical processor is referred to as the

scheduling mode. You can select dedicated mode or shared mode for the

scheduling mode. Different features of each mode are shown in the table

below.

Table 1-3 Processor Scheduling Mode

Mode Description

Recommended

System

Dedicated

Mode

• The logical processor on an LPAR dedicatedly

uses the corresponding physical processor.

• Since there is no overhead for switching the

physical processors between the logical

processors, the LPAR performs faster.

• For each LPAR, it is possible to specify the

number of dedicated logical processors

assigned. (However, it is not possible to specify

more than the number of physical processors

available.)

• System required

high processing

performance

• System required

critical time

period and high

processing in

performance

Shared

Mode

• Physical processors are time-shared among the

logical processors defined in the LPAR for which

the shared mode is specified.

• The utilization rate of the physical processors

can be set dynamically for each LPAR, allowing

flexible use of physical processor resources.

• The number of logical processors to be used in

the shared mode can be set for each LPAR. (It

is possible to specify more than the number of

physical processors available, but this

operations may cause the extremely slow

down.)

• System required

cost efficiency

and flexibility

rather than high

processing

performance

• System required

balanced

processing

between LPARs

Dedicated Mode

Example of Dedicated Mode is below

1-4

LPAR manager Functions

Hitachi Compute Blade 500 Series Logical partitioning manager User's Guide

Figure 1-3 Processor Assignment of Dedicated Mode

Shared Mode

Example of Dedicated Mode is below

Figure 1-4 Processor Assignment of Shared Mode

Scheduling mode dynamically change

Shared and dedicated LPARs can be switched dynamically without

deactivating.

a. The Scheduling mode of arbitrary Logical processor can be changed from

dedicated mode to shared mode.

b. The Scheduling mode of arbitrary Logical processor can be changed from

shared mode to dedicated mode.

LPAR manager Functions

1-5

Hitachi Compute Blade 500 Series Logical partitioning manager User's Guide

Figure 1-5 Scheduling mode dynamically change

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 run 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 unit. 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).

Service ratio has a meaning only to LPAR of shared mode. Service ratio does

not have any meaning to LPAR of shared mode, and cannot be assigned.

The examples of the relations between Service Ratio and allocation rate are

as follows.

(Example 1)

This example shows the allocation rates of LPAR1 (Service Ratio=100, the

number of the logical processors=2) and LPAR2 (Service Ratio=100, the

number of the logical processors=2) when the number of the physical

processor can be used by the shared mode LPARs is 3.

Figure 1-6 Service Ratio Example 1

1-6

LPAR manager Functions

Hitachi Compute Blade 500 Series Logical partitioning manager User's Guide

Page is loading ...

Hitachi CB 520A A1 User manual

This manual is also suitable for

Hitachi CB 520A A1 User manual

Related papers

Other documents