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IBM Powerha Systemmirror V7.2 for AIX Updates

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IBM PowerHA SystemMirror V7.2 for IBM AIX Updates

Dino Quintero Sergio Baeta Shawn Bodily Bernhard Buehler Primitivo Cervantes Bing He Mihai Huica Howard Knight

Redbooks

International Technical Support Organization

IBM PowerHA SystemMirror V7.2 for IBM AIX Updates

July 2016

SG24-8278-00
Note: Before using this information and the product it supports, read the information in “Notices” on page ix.

First Edition (July 2016)

This edition applies to IBM AIX V7100-03-05-1524, IBM PowerHA SystemMirror V7.2.0, IBM AIX V7.1.3.4, IBM AIX V7.2.0, IBM AIX V7.1 TL3 SP5, IBM PowerHA SystemMirror V7.1.1 SP1, IBM PowerHA SystemMirror V7.1.2 SP1, IBM PowerHA SystemMirror V7.1.3 GA, IBM HTTP Server V7.0.0.0.

© Copyright International Business Machines Corporation 2016. All rights reserved.

Note to U.S. Government Users Restricted Rights -- Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp.

Contents

Notices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .x

IBM Redbooks promotions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii Authors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii Now you can become a published author, too . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xv Comments welcome. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xv Stay connected to IBM Redbooks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xv

Chapter 1. Introduction to IBM PowerHA SystemMirror for IBM AIX . . . . . . . . . . . . . . . 1

1.1 What IBM PowerHA SystemMirror for IBM AIX is. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1.1 High availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.1.2 Cluster multiprocessing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.2 Availability solutions: An overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2.1 Downtime . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.2.2 Single point of failure (SPOF) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.3 History and evolution. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.3.1 PowerHA SystemMirror version 7.1.1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1.3.2 PowerHA SystemMirror version 7.1.2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1.3.3 PowerHA SystemMirror version 7.1.3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 1.3.4 PowerHA SystemMirror version 7.2.0. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.4 High availability terminology and concepts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.4.1 Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.5 Fault tolerance versus high availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.5.1 Fault-tolerant systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 1.5.2 High availability systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.6 Additional PowerHA resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Chapter 2. IBM PowerHA SystemMirror V7.2 for IBM AIX new features . . . . . . . . . . . 17

2.1 Resiliency enhancements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.1.1 Integrated support for AIX Live Kernel Update . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 2.1.2 Automatic repository replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 2.1.3 Verification enhancements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 2.1.4 Use of Logical Volume Manager rootvg failure monitoring . . . . . . . . . . . . . . . . . . 21 2.1.5 Live Partition Mobility automation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
2.2 Cluster Aware AIX (CAA) Enhancements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
2.2.1 Network Failure Detection Tunable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 2.2.2 Built in NETMON logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 2.2.3 Traffic stimulation for better interface failure detection . . . . . . . . . . . . . . . . . . . . . 25
2.3 Enhanced “split brain” handling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 2.4 Resource optimized high availability (ROHA) fallovers using Enterprise Pools . . . . . . 26 2.5 Non-disruptive upgrades . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 2.6 GLVM wizard. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Chapter 3. Planning considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

3.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
3.1.1 Mirrored architecture. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

© Copyright IBM Corp. 2016. All rights reserved.

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3.1.2 Single storage architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 3.1.3 Stretched cluster . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 3.1.4 Linked cluster . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
3.2 Cluster Aware AIX repository disk. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
3.2.1 Preparing for a CAA repository disk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 3.2.2 CAA with multiple storage devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
3.3 Important considerations for Virtual Input/Output Server . . . . . . . . . . . . . . . . . . . . . . . 39
3.3.1 Using poll_uplink. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 3.3.2 Advantages for PowerHA when poll_uplink is used . . . . . . . . . . . . . . . . . . . . . . . 41
3.4 Network considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
3.4.1 Dual adapter networks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 3.4.2 Single adapter network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
3.5 Network File System tie breaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
3.5.1 Introduction and concepts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 3.5.2 Test environment setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 3.5.3 NFS server and client configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 3.5.4 NFS tie breaker configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 3.5.5 NFS tie breaker tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 3.5.6 Log entries for monitoring and debugging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Chapter 4. What’s new with IBM Cluster Aware AIX and Reliable Scalable Clustering

Technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
4.1 CAA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
4.1.1 CAA tunables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 4.1.2 What is new in CAA overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 4.1.3 Monitoring /var usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 4.1.4 New lscluster option -g . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 4.1.5 Interface failure detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
4.2 Automatic repository update for the repository disk . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
4.2.1 Introduction to the automatic repository update . . . . . . . . . . . . . . . . . . . . . . . . . . 77 4.2.2 Requirements for Automatic Repository Update. . . . . . . . . . . . . . . . . . . . . . . . . . 78 4.2.3 Configuring Automatic Repository Update . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78 4.2.4 Automatic Repository Update operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
4.3 Reliable Scalable Cluster Technology overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
4.3.1 What Reliable Scalable Cluster Technology is . . . . . . . . . . . . . . . . . . . . . . . . . . . 88 4.3.2 Reliable Scalable Cluster Technology components . . . . . . . . . . . . . . . . . . . . . . . 88
4.4 IBM PowerHA, RSCT, and CAA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
4.4.1 Configuring PowerHA, RSCT, and CAA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98 4.4.2 Relationship between PowerHA, RSCT, CAA . . . . . . . . . . . . . . . . . . . . . . . . . . . 99 4.4.3 How to start and stop CAA and RSCT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

Chapter 5. Migration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107 5.1 Migration planning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
5.1.1 PowerHA SystemMirror V7.2.0 requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . 108 5.1.2 Deprecated features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109 5.1.3 Migration options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110 5.1.4 Migration steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111 5.1.5 Clmigcheck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114 5.1.6 Clmigcheck enhancements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116 5.1.7 Migration matrix to PowerHA SystemMirror V7.2.0. . . . . . . . . . . . . . . . . . . . . . . 117
5.2 Migration scenarios from PowerHA V6.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
5.2.1 PowerHA V6.1 test environment overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117 5.2.2 Rolling migration from PowerHA V6.1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118 5.2.3 Offline migration from PowerHA V6.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126

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5.2.4 Snapshot migration from PowerHA V6.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
5.3 Migration scenarios from PowerHA V7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
5.3.1 PowerHA V7.1 test environment overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131 5.3.2 Check and document initial stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132 5.3.3 Offline migration of PowerHA from 7.1.3 to 7.2.0 . . . . . . . . . . . . . . . . . . . . . . . . 138 5.3.4 Rolling migration of PowerHA from 7.1.3 to 7.2.0. . . . . . . . . . . . . . . . . . . . . . . . 142 5.3.5 Snapshot migration from PowerHA 7.1.3 to 7.2.0. . . . . . . . . . . . . . . . . . . . . . . . 147 5.3.6 Non-disruptive migration of PowerHA from 7.1.3 to 7.2.0. . . . . . . . . . . . . . . . . . 153 5.3.7 Migrations of PowerHA from 7.1.1 and 7.1.2 to 7.2.0 . . . . . . . . . . . . . . . . . . . . . 158

Chapter 6. Resource Optimized High Availability (ROHA) . . . . . . . . . . . . . . . . . . . . . 163

6.1 ROHA concept and terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
6.1.1 Environment requirement for ROHA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
6.2 New PowerHA SystemMirror SMIT configure panel for ROHA. . . . . . . . . . . . . . . . . . 165
6.2.1 Entry point to ROHA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166 6.2.2 ROHA panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167 6.2.3 HMC configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168 6.2.4 Hardware resource provisioning for application controller . . . . . . . . . . . . . . . . . 175 6.2.5 Change/Show Default Cluster Tunable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180
6.3 New PowerHA SystemMirror verification enhancement for ROHA. . . . . . . . . . . . . . . 181 6.4 Planning for one ROHA cluster environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183
6.4.1 Consideration before ROHA configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183 6.4.2 Configuration steps for ROHA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193
6.5 Resource acquisition and release process introduction . . . . . . . . . . . . . . . . . . . . . . . 194
6.5.1 Steps for allocation and for release . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194
6.6 Introduction to resource acquisition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195
6.6.1 Query . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196 6.6.2 Resource computation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199 6.6.3 Identify the method of resource allocation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201 6.6.4 Acquire the resource. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203
6.7 Introduction to release of resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204
6.7.1 Query . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205 6.7.2 Synchronous and asynchronous mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209 6.7.3 Automatic resource release process after an operating system crash . . . . . . . . 210
6.8 Example 1: Setup one ROHA cluster (without On/Off CoD) . . . . . . . . . . . . . . . . . . . . 210
6.8.1 Requirement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210 6.8.2 Hardware topology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211 6.8.3 Cluster configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212 6.8.4 Show the ROHA configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214
6.9 Test scenarios of Example 1 (without On/Off CoD) . . . . . . . . . . . . . . . . . . . . . . . . . . 217
6.9.1 Bring two resource groups online . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217 6.9.2 Move one resource group to another node. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223 6.9.3 Primary node crashes and reboots with current configuration . . . . . . . . . . . . . . 231
6.10 Example 2: Set up one ROHA cluster (with On/Off CoD) . . . . . . . . . . . . . . . . . . . . . 232
6.10.1 Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233 6.10.2 Hardware topology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233 6.10.3 Cluster configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234 6.10.4 Showing the ROHA configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235
6.11 Test scenarios for Example 2 (with On/Off CoD) . . . . . . . . . . . . . . . . . . . . . . . . . . . 237
6.11.1 Bring two resource groups online . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238 6.11.2 Bring one resource group offline. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243
6.12 Hardware Management Console (HMC) high availability introduction . . . . . . . . . . . 244
6.12.1 Switch to the backup HMC for the Power Enterprise Pool . . . . . . . . . . . . . . . . 246

Contents

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6.13 Test scenario for HMC fallover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 246
6.13.1 Hardware topology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 247 6.13.2 Bring one resource group offline when primary HMC fails . . . . . . . . . . . . . . . . 250 6.13.3 Testing summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 255
6.14 Manage, monitor and troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 255
6.14.1 The clmgr interface to manage ROHA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 255 6.14.2 Changing the DLPAR and CoD resources dynamically . . . . . . . . . . . . . . . . . . 258 6.14.3 View the ROHA report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 258 6.14.4 Troubleshooting DLPAR and CoD operations . . . . . . . . . . . . . . . . . . . . . . . . . 259

Chapter 7. Using the GLVM Configuration Assistant . . . . . . . . . . . . . . . . . . . . . . . . . 261

7.1 Choosing the data replication type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 262
7.1.1 Synchronous Mirroring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 262 7.1.2 Asynchronous Mirroring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 262 7.1.3 GLVM Configuration Assistant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263
7.2 Configuration requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263 7.3 Test environment overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 264
7.3.1 Test environment details. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 264
7.4 Creating a sample cluster environment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 267
7.4.1 Configuring a multisite cluster. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 267 7.4.2 Configuring an asynchronous geographically mirrored volume group by using the
GLVM Configuration Assistant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 272
7.4.3 Creating a logical volume and a file system with the cluster online . . . . . . . . . . 275 7.4.4 Creating a new logical volume and file system with cluster services stopped. . . 279

Chapter 8. Automation to adapt to the Live Partition Mobility (LPM) operation . . . . 283

8.1 Concept. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 284
8.1.1 Prerequisites for PowerHA node support of LPM . . . . . . . . . . . . . . . . . . . . . . . . 286 8.1.2 Reduce LPM freeze time as far as possible . . . . . . . . . . . . . . . . . . . . . . . . . . . . 286 8.1.3 PowerHA fix requirement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 286
8.2 Operation flow to support LPM on PowerHA node . . . . . . . . . . . . . . . . . . . . . . . . . . . 286
8.2.1 Pre-migration operation flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 287 8.2.2 Post-migration operation flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 289
8.3 Example: LPM scenario for PowerHA node with version 7.1 . . . . . . . . . . . . . . . . . . . 291
8.3.1 Topology introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 291 8.3.2 Initial status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 292 8.3.3 Manual operation before LPM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 296 8.3.4 Perform LPM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303 8.3.5 Manual operation after LPM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 304
8.4 New panel to support LPM in PowerHA 7.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 308 8.5 PowerHA 7.2 scenario and troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 309
8.5.1 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 310

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