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by Anthony Steel, Matthew W Radford, Fabio Martins, Maria-Katharina Esser, Bing He,
IBM PowerHA SystemMirror V7.2.1 for IBM AIX Updates
Front cover
Notices
Trademarks
Preface
Authors
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Chapter 1. Introduction to IBM PowerHA SystemMirror for AIX
1.1 What is PowerHA SystemMirror for AIX
1.1.1 High availability
1.1.2 Cluster multiprocessing
1.2 Availability solutions: An overview
1.2.1 Downtime
1.2.2 Single point of failure
1.3 History and evolution
1.3.1 PowerHA SystemMirror Version 7.1.1
1.3.2 PowerHA SystemMirror Version 7.1.2
1.3.3 PowerHA SystemMirror Version 7.1.3
1.3.4 PowerHA SystemMirror Version 7.2.0
1.3.5 PowerHA SystemMirror Version 7.2.1
1.4 High availability terminology and concepts
1.4.1 Terminology
1.5 Fault tolerance versus high availability
1.5.1 Fault-tolerant systems
1.5.2 High availability systems
1.6 Additional PowerHA resources
Chapter 2. IBM PowerHA SystemMirror V7.2.0 and V7.2.1 for IBM AIX new features
2.1 Resiliency enhancements
2.1.1 Integrated support for AIX Live Kernel Update
2.1.2 Automatic Repository Replacement
2.1.3 Verification enhancements
2.1.4 Using Logical Volume Manager rootvg failure monitoring
2.1.5 Live Partition Mobility automation
2.2 Cluster Aware AIX enhancements
2.2.1 Network failure detection tunable
2.2.2 Built-in NETMON logic
2.2.3 Traffic stimulation for better interface failure detection
2.2.4 Monitoring /var usage
2.2.5 New lscluster option -g
2.2.6 CAA level added to the lscluster -c output
2.3 Enhanced split-brain handling
2.4 Resource Optimized High Availability fallovers by using enterprise pools
2.5 Nondisruptive upgrades
2.6 Geographic Logical Volume Manager wizard
2.7 New option for starting PowerHA by using clmgr
2.8 Graphical user interface
Chapter 3. Planning considerations
3.1 Introduction
3.1.1 Mirrored architecture
3.1.2 Single storage architecture
3.1.3 Stretched cluster
3.1.4 Linked cluster
3.2 Cluster Aware AIX repository disk
3.2.1 Preparing for a Cluster Aware AIX repository disk
3.2.2 Cluster Aware AIX with multiple storage devices
3.3 Important considerations for virtual input/output server
3.3.1 Using poll_uplink
3.3.2 Advantages for PowerHA when poll_uplink is used
3.4 Network considerations
3.4.1 Dual-adapter networks
3.4.2 Single-adapter network
3.5 Network File System tie breaker
3.5.1 Introduction and concepts
3.5.2 Test environment setup
3.5.3 NFS server and client configuration
3.5.4 NFS tie-breaker configuration
3.5.5 NFS tie-breaker tests
3.5.6 Log entries for monitoring and debugging
Chapter 4. What is new with IBM Cluster Aware AIX and Reliable Scalable Clustering Technology
4.1 Cluster Aware AIX
4.1.1 Cluster Aware AIX tunables
4.1.2 What is new in Cluster Aware AIX: Overview
4.1.3 Monitoring /var usage
4.1.4 New lscluster option -g
4.1.5 Interface failure detection
4.2 Automatic repository update for the repository disk
4.2.1 Introduction to the Automatic Repository Update
4.2.2 Requirements for Automatic Repository Update
4.2.3 Configuring Automatic Repository Update
4.2.4 Automatic Repository Update operations
4.3 Reliable Scalable Cluster Technology overview
4.3.1 What Reliable Scalable Cluster Technology is
4.3.2 Reliable Scalable Cluster Technology components
4.4 PowerHA, Reliable Scalable Clustering Technology, and Cluster Aware AIX
4.4.1 Configuring PowerHA, Reliable Scalable Clustering Technology, and Cluster Aware AIX
4.4.2 Relationship between PowerHA, Reliable Scalable Clustering Technology, and Cluster Aware AIX
4.4.3 How to start and stop CAA and RSCT
Chapter 5. Migration
5.1 Migration planning
5.1.1 PowerHA SystemMirror V7.2.1 requirements
5.1.2 Deprecated features
5.1.3 Migration options
5.1.4 Migration steps
5.1.5 Migration matrix to PowerHA SystemMirror 7.2.1
5.2 Migration scenarios from PowerHA V7.1.3
5.2.1 PowerHA V7.1.3 test environment overview
5.2.2 Rolling migration from PowerHA V7.1.3
5.2.3 Offline migration from PowerHA V7.1.3
5.2.4 Snapshot migration from PowerHA V7.1.3
5.2.5 Nondisruptive upgrade from PowerHA V7.1.3
5.3 Migration scenarios from PowerHA V7.2.0
5.3.1 PowerHA V7.2.0 test environment overview
5.3.2 Rolling migration from PowerHA V7.2.0
5.3.3 Offline migration from PowerHA V7.2.0
5.3.4 Snapshot migration from PowerHA V7.2.0
5.3.5 Nondisruptive upgrade from PowerHA V7.2.0
Chapter 6. Resource Optimized High Availability
6.1 Resource Optimized High Availability concept and terminology
6.1.1 Environment requirement for Resource Optimized High Availability
6.2 New PowerHA SystemMirror SMIT configuration panels for Resource Optimized High Availability
6.2.1 Entry point to Resource Optimized High Availability
6.2.2 Resource Optimized High Availability panel
6.2.3 HMC configuration
6.2.4 Hardware resource provisioning for application controller
6.2.5 Change/Show Default Cluster Tunable
6.3 New PowerHA SystemMirror verification enhancement for Resource Optimized High Availability
6.4 Planning for one Resource Optimized High Availability cluster environment
6.4.1 Consideration before Resource Optimized High Availability configuration
6.4.2 Configuration steps for Resource Optimized High Availability
6.5 Resource acquisition and release process introduction
6.5.1 Steps for allocation and for release
6.6 Introduction to resource acquisition
6.6.1 Query
6.6.2 Resource computation
6.6.3 Identifying the method of resource allocation
6.6.4 Acquiring the resource
6.7 Introduction to release of resources
6.7.1 Query
6.7.2 Synchronous and asynchronous mode
6.7.3 Automatic resource release process after an operating system crash
6.8 Example 1: Setting up one Resource Optimized High Availability cluster (without On/Off CoD)
6.8.1 Requirement
6.8.2 Hardware topology
6.8.3 Cluster configuration
6.8.4 Showing the Resource Optimized High Availability configuration
6.9 Test scenarios of Example 1 (without On/Off CoD)
6.9.1 Bringing two resource groups online
6.9.2 Moving one resource group to another node
6.9.3 Restarting with the current configuration after the primary node crashes
6.10 Example 2: Setting up one Resource Optimized High Availability cluster (with On/Off CoD)
6.10.1 Requirements
6.10.2 Hardware topology
6.10.3 Cluster configuration
6.10.4 Showing the Resource Optimized High Availability configuration
6.11 Test scenarios for Example 2 (with On/Off CoD)
6.11.1 Bringing two resource groups online
6.11.2 Bringing one resource group offline
6.12 Hardware Management Console high availability introduction
6.12.1 Switching to the backup HMC for the Power Enterprise Pool
6.13 Test scenario for HMC fallover
6.13.1 Hardware topology
6.13.2 Bringing one resource group offline when the primary HMC fails
6.13.3 Testing summary
6.14 Managing, monitoring, and troubleshooting
6.14.1 The clmgr interface to manage Resource Optimized High Availability
6.14.2 Changing the DLPAR and CoD resources dynamically
6.14.3 View the Resource Optimized High Availability report
6.14.4 Troubleshooting DLPAR and CoD operations
Chapter 7. Geographic Logical Volume Manager configuration assistant
7.1 Introduction
7.1.1 Geographical Logical Volume Manager
7.1.2 GLVM configuration assistant
7.2 Prerequisites
7.3 Using the GLVM wizard
7.3.1 Test environment overview
7.3.2 Synchronous configuration
7.3.3 Asynchronous configuration
Chapter 8. Automation adaptation for Live Partition Mobility
8.1 Concept
8.1.1 Prerequisites for PowerHA node support of Live Partition Mobility
8.1.2 PowerHA fix requirement
8.1.3 Reducing the Live Partition Mobility freeze time
8.2 Operation flow to support Live Partition Mobility on a PowerHA node
8.2.1 Pre-migration operation flow
8.2.2 Post-migration operation flow
8.3 Example: Live Partition Mobility scenario for PowerHA V7.1
8.3.1 Topology introduction
8.3.2 Initial status
8.3.3 Manual pre-Live Partition Mobility operations
8.3.4 Performing Live Partition Mobility
8.3.5 Manual post-Live Partition Mobility operations
8.4 Live Partition Mobility SMIT panel
8.5 PowerHA V7.2 scenario and troubleshooting
8.5.1 Troubleshooting
Chapter 9. IBM PowerHA SystemMirror User Interface
9.1 Introduction
9.2 Installation
9.2.1 Planning
9.2.2 SMUI Client: Cluster nodes
9.2.3 SMUI server
9.2.4 Adding and removing clusters
9.3 Navigating
9.3.1 Event summaries
9.3.2 Log files
9.3.3 General
9.3.4 Network
9.3.5 Terminal session
9.4 Troubleshooting
9.4.1 Log files
9.4.2 Login problems
9.4.3 Adding clusters
9.4.4 Status not updating
Chapter 10. Cluster partitioning management update
10.1 Introduction to cluster partitioning
10.1.1 Causes of a partitioned cluster
10.1.2 Terminology
10.2 PowerHA cluster split and merge policies (before PowerHA V7.2.1)
10.2.1 Split policy
10.2.2 Merge policy
10.2.3 Configuration for the split and merge policy
10.3 PowerHA quarantine policy
10.3.1 Active node halt quarantine policy
10.3.2 Disk fencing quarantine
10.3.3 Configuration of quarantine policies
10.4 Changes in split and merge policies in PowerHA V7.2.1
10.4.1 Configuring the split and merge policy by using SMIT
10.4.2 Configuring the split and merge policy by using clmgr
10.4.3 Starting cluster services after a split
10.4.4 Migration and limitation
10.5 Considerations for using split and merge quarantine policies
10.6 Split and merge policy testing environment
10.6.1 Basic configuration
10.6.2 Specific hardware configuration for some scenarios
10.6.3 Initial PowerHA service status for each scenario
10.7 Scenario: Default split and merge policy
10.7.1 Scenario description
10.7.2 Split and merge configuration in PowerHA
10.7.3 Cluster split
10.7.4 Cluster merge
10.7.5 Scenario summary
10.8 Scenario: Split and merge policy with a disk tie breaker
10.8.1 Scenario description
10.8.2 Split and merge configuration in PowerHA
10.8.3 Cluster split
10.8.4 How to change the tie breaker group leader manually
10.8.5 Cluster merge
10.8.6 Scenario summary
10.9 Scenario: Split and merge policy with the NFS tie breaker
10.9.1 Scenario description
10.9.2 Setting up the NFS environment
10.9.3 Setting the NFS split and merge policies
10.9.4 Cluster split
10.9.5 Cluster merge
10.9.6 Scenario summary
10.10 Scenario: Split and merge policy is manual
10.10.1 Scenario description
10.10.2 Split and merge configuration in PowerHA
10.10.3 Cluster split
10.10.4 Cluster merge
10.10.5 Scenario summary
10.11 Scenario: Active node halt policy quarantine
10.11.1 Scenario description
10.11.2 HMC password-less access configuration
10.11.3 HMC configuration in PowerHA
10.11.4 Quarantine policy configuration in PowerHA
10.11.5 Simulating a cluster split
10.11.6 Cluster merge occurs
10.11.7 Scenario summary
10.12 Scenario: Enabling the disk fencing quarantine policy
10.12.1 Scenario description
10.12.2 Quarantine policy configuration in PowerHA
10.12.3 Simulating a cluster split
10.12.4 Simulating a cluster merge
10.12.5 Scenario summary
Chapter 11. IBM PowerHA SystemMirror special features
11.1 New option for starting PowerHA by using the clmgr command
11.1.1 PowerHA Resource Group dependency settings
11.1.2 Use case for using manage=delayed
Appendix A. SCSI reservations
SCSI reservations
Persistent Reserve IN
Storage
More about PR reservations
Persistent reservation commands
Appendix B. IBM PowerHA: Live kernel update support
Live kernel update support
Example of live kernel update patching a kernel interim fix in a PowerHA environment
Related publications
IBM Redbooks
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Online resources
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IBM PowerHA SystemMirror V7.2.1 for IBM AIX Updates
Back cover
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ISBN 0738442518
SG24-8372-00
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