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IBM PowerHA SystemMirror V7.2.1 for IBM AIX Updates

Book Description

Abstract

This IBM® Redbooks® publication helps strengthen the position of the IBM PowerHA® SystemMirror® solution with a well-defined and documented deployment models within an IBM Power Systems™ virtualized environment, which provides customers with a planned foundation for business resilience and disaster recovery for their IBM Power Systems
infrastructure solutions.

This publication addresses topics to help meet customers' complex high availability and disaster recovery requirements on IBM Power Systems servers to help maximize their
systems' availability and resources, and provide technical documentation to transfer the how-to-skills to users and support teams.

This book is targeted at technical professionals (consultants, technical support staff, IT Architects, and IT Specialists) who are responsible for providing high availability and disaster recovery solutions and support with IBM PowerHA SystemMirror Standard and Enterprise Editions on IBM Power Systems servers.

Table of Contents

  1. Front cover
  2. Notices
    1. Trademarks
  3. Preface
    1. Authors
    2. Now you can become a published author, too!
    3. Comments welcome
    4. Stay connected to IBM Redbooks
  4. Chapter 1. Introduction to IBM PowerHA SystemMirror for AIX
    1. 1.1 What is PowerHA SystemMirror for AIX
      1. 1.1.1 High availability
      2. 1.1.2 Cluster multiprocessing
    2. 1.2 Availability solutions: An overview
      1. 1.2.1 Downtime
      2. 1.2.2 Single point of failure
    3. 1.3 History and evolution
      1. 1.3.1 PowerHA SystemMirror Version 7.1.1
      2. 1.3.2 PowerHA SystemMirror Version 7.1.2
      3. 1.3.3 PowerHA SystemMirror Version 7.1.3
      4. 1.3.4 PowerHA SystemMirror Version 7.2.0
      5. 1.3.5 PowerHA SystemMirror Version 7.2.1
    4. 1.4 High availability terminology and concepts
      1. 1.4.1 Terminology
    5. 1.5 Fault tolerance versus high availability
      1. 1.5.1 Fault-tolerant systems
      2. 1.5.2 High availability systems
    6. 1.6 Additional PowerHA resources
  5. Chapter 2. IBM PowerHA SystemMirror V7.2.0 and V7.2.1 for IBM AIX new features
    1. 2.1 Resiliency enhancements
      1. 2.1.1 Integrated support for AIX Live Kernel Update
      2. 2.1.2 Automatic Repository Replacement
      3. 2.1.3 Verification enhancements
      4. 2.1.4 Using Logical Volume Manager rootvg failure monitoring
      5. 2.1.5 Live Partition Mobility automation
    2. 2.2 Cluster Aware AIX enhancements
      1. 2.2.1 Network failure detection tunable
      2. 2.2.2 Built-in NETMON logic
      3. 2.2.3 Traffic stimulation for better interface failure detection
      4. 2.2.4 Monitoring /var usage
      5. 2.2.5 New lscluster option -g
      6. 2.2.6 CAA level added to the lscluster -c output
    3. 2.3 Enhanced split-brain handling
    4. 2.4 Resource Optimized High Availability fallovers by using enterprise pools
    5. 2.5 Nondisruptive upgrades
    6. 2.6 Geographic Logical Volume Manager wizard
    7. 2.7 New option for starting PowerHA by using clmgr
    8. 2.8 Graphical user interface
  6. Chapter 3. Planning considerations
    1. 3.1 Introduction
      1. 3.1.1 Mirrored architecture
      2. 3.1.2 Single storage architecture
      3. 3.1.3 Stretched cluster
      4. 3.1.4 Linked cluster
    2. 3.2 Cluster Aware AIX repository disk
      1. 3.2.1 Preparing for a Cluster Aware AIX repository disk
      2. 3.2.2 Cluster Aware AIX with multiple storage devices
    3. 3.3 Important considerations for virtual input/output server
      1. 3.3.1 Using poll_uplink
      2. 3.3.2 Advantages for PowerHA when poll_uplink is used
    4. 3.4 Network considerations
      1. 3.4.1 Dual-adapter networks
      2. 3.4.2 Single-adapter network
    5. 3.5 Network File System tie breaker
      1. 3.5.1 Introduction and concepts
      2. 3.5.2 Test environment setup
      3. 3.5.3 NFS server and client configuration
      4. 3.5.4 NFS tie-breaker configuration
      5. 3.5.5 NFS tie-breaker tests
      6. 3.5.6 Log entries for monitoring and debugging
  7. Chapter 4. What is new with IBM Cluster Aware AIX and Reliable Scalable Clustering Technology
    1. 4.1 Cluster Aware AIX
      1. 4.1.1 Cluster Aware AIX tunables
      2. 4.1.2 What is new in Cluster Aware AIX: Overview
      3. 4.1.3 Monitoring /var usage
      4. 4.1.4 New lscluster option -g
      5. 4.1.5 Interface failure detection
    2. 4.2 Automatic repository update for the repository disk
      1. 4.2.1 Introduction to the Automatic Repository Update
      2. 4.2.2 Requirements for Automatic Repository Update
      3. 4.2.3 Configuring Automatic Repository Update
      4. 4.2.4 Automatic Repository Update operations
    3. 4.3 Reliable Scalable Cluster Technology overview
      1. 4.3.1 What Reliable Scalable Cluster Technology is
      2. 4.3.2 Reliable Scalable Cluster Technology components
    4. 4.4 PowerHA, Reliable Scalable Clustering Technology, and Cluster Aware AIX
      1. 4.4.1 Configuring PowerHA, Reliable Scalable Clustering Technology, and Cluster Aware AIX
      2. 4.4.2 Relationship between PowerHA, Reliable Scalable Clustering Technology, and Cluster Aware AIX
      3. 4.4.3 How to start and stop CAA and RSCT
  8. Chapter 5. Migration
    1. 5.1 Migration planning
      1. 5.1.1 PowerHA SystemMirror V7.2.1 requirements
      2. 5.1.2 Deprecated features
      3. 5.1.3 Migration options
      4. 5.1.4 Migration steps
      5. 5.1.5 Migration matrix to PowerHA SystemMirror 7.2.1
    2. 5.2 Migration scenarios from PowerHA V7.1.3
      1. 5.2.1 PowerHA V7.1.3 test environment overview
      2. 5.2.2 Rolling migration from PowerHA V7.1.3
      3. 5.2.3 Offline migration from PowerHA V7.1.3
      4. 5.2.4 Snapshot migration from PowerHA V7.1.3
      5. 5.2.5 Nondisruptive upgrade from PowerHA V7.1.3
    3. 5.3 Migration scenarios from PowerHA V7.2.0
      1. 5.3.1 PowerHA V7.2.0 test environment overview
      2. 5.3.2 Rolling migration from PowerHA V7.2.0
      3. 5.3.3 Offline migration from PowerHA V7.2.0
      4. 5.3.4 Snapshot migration from PowerHA V7.2.0
      5. 5.3.5 Nondisruptive upgrade from PowerHA V7.2.0
  9. Chapter 6. Resource Optimized High Availability
    1. 6.1 Resource Optimized High Availability concept and terminology
      1. 6.1.1 Environment requirement for Resource Optimized High Availability
    2. 6.2 New PowerHA SystemMirror SMIT configuration panels for Resource Optimized High Availability
      1. 6.2.1 Entry point to Resource Optimized High Availability
      2. 6.2.2 Resource Optimized High Availability panel
      3. 6.2.3 HMC configuration
      4. 6.2.4 Hardware resource provisioning for application controller
      5. 6.2.5 Change/Show Default Cluster Tunable
    3. 6.3 New PowerHA SystemMirror verification enhancement for Resource Optimized High Availability
    4. 6.4 Planning for one Resource Optimized High Availability cluster environment
      1. 6.4.1 Consideration before Resource Optimized High Availability configuration
      2. 6.4.2 Configuration steps for Resource Optimized High Availability
    5. 6.5 Resource acquisition and release process introduction
      1. 6.5.1 Steps for allocation and for release
    6. 6.6 Introduction to resource acquisition
      1. 6.6.1 Query
      2. 6.6.2 Resource computation
      3. 6.6.3 Identifying the method of resource allocation
      4. 6.6.4 Acquiring the resource
    7. 6.7 Introduction to release of resources
      1. 6.7.1 Query
      2. 6.7.2 Synchronous and asynchronous mode
      3. 6.7.3 Automatic resource release process after an operating system crash
    8. 6.8 Example 1: Setting up one Resource Optimized High Availability cluster (without On/Off CoD)
      1. 6.8.1 Requirement
      2. 6.8.2 Hardware topology
      3. 6.8.3 Cluster configuration
      4. 6.8.4 Showing the Resource Optimized High Availability configuration
    9. 6.9 Test scenarios of Example 1 (without On/Off CoD)
      1. 6.9.1 Bringing two resource groups online
      2. 6.9.2 Moving one resource group to another node
      3. 6.9.3 Restarting with the current configuration after the primary node crashes
    10. 6.10 Example 2: Setting up one Resource Optimized High Availability cluster (with On/Off CoD)
      1. 6.10.1 Requirements
      2. 6.10.2 Hardware topology
      3. 6.10.3 Cluster configuration
      4. 6.10.4 Showing the Resource Optimized High Availability configuration
    11. 6.11 Test scenarios for Example 2 (with On/Off CoD)
      1. 6.11.1 Bringing two resource groups online
      2. 6.11.2 Bringing one resource group offline
    12. 6.12 Hardware Management Console high availability introduction
      1. 6.12.1 Switching to the backup HMC for the Power Enterprise Pool
    13. 6.13 Test scenario for HMC fallover
      1. 6.13.1 Hardware topology
      2. 6.13.2 Bringing one resource group offline when the primary HMC fails
      3. 6.13.3 Testing summary
    14. 6.14 Managing, monitoring, and troubleshooting
      1. 6.14.1 The clmgr interface to manage Resource Optimized High Availability
      2. 6.14.2 Changing the DLPAR and CoD resources dynamically
      3. 6.14.3 View the Resource Optimized High Availability report
      4. 6.14.4 Troubleshooting DLPAR and CoD operations
  10. Chapter 7. Geographic Logical Volume Manager configuration assistant
    1. 7.1 Introduction
      1. 7.1.1 Geographical Logical Volume Manager
      2. 7.1.2 GLVM configuration assistant
    2. 7.2 Prerequisites
    3. 7.3 Using the GLVM wizard
      1. 7.3.1 Test environment overview
      2. 7.3.2 Synchronous configuration
      3. 7.3.3 Asynchronous configuration
  11. Chapter 8. Automation adaptation for Live Partition Mobility
    1. 8.1 Concept
      1. 8.1.1 Prerequisites for PowerHA node support of Live Partition Mobility
      2. 8.1.2 PowerHA fix requirement
      3. 8.1.3 Reducing the Live Partition Mobility freeze time
    2. 8.2 Operation flow to support Live Partition Mobility on a PowerHA node
      1. 8.2.1 Pre-migration operation flow
      2. 8.2.2 Post-migration operation flow
    3. 8.3 Example: Live Partition Mobility scenario for PowerHA V7.1
      1. 8.3.1 Topology introduction
      2. 8.3.2 Initial status
      3. 8.3.3 Manual pre-Live Partition Mobility operations
      4. 8.3.4 Performing Live Partition Mobility
      5. 8.3.5 Manual post-Live Partition Mobility operations
    4. 8.4 Live Partition Mobility SMIT panel
    5. 8.5 PowerHA V7.2 scenario and troubleshooting
      1. 8.5.1 Troubleshooting
  12. Chapter 9. IBM PowerHA SystemMirror User Interface
    1. 9.1 Introduction
    2. 9.2 Installation
      1. 9.2.1 Planning
      2. 9.2.2 SMUI Client: Cluster nodes
      3. 9.2.3 SMUI server
      4. 9.2.4 Adding and removing clusters
    3. 9.3 Navigating
      1. 9.3.1 Event summaries
      2. 9.3.2 Log files
      3. 9.3.3 General
      4. 9.3.4 Network
      5. 9.3.5 Terminal session
    4. 9.4 Troubleshooting
      1. 9.4.1 Log files
      2. 9.4.2 Login problems
      3. 9.4.3 Adding clusters
      4. 9.4.4 Status not updating
  13. Chapter 10. Cluster partitioning management update
    1. 10.1 Introduction to cluster partitioning
      1. 10.1.1 Causes of a partitioned cluster
      2. 10.1.2 Terminology
    2. 10.2 PowerHA cluster split and merge policies (before PowerHA V7.2.1)
      1. 10.2.1 Split policy
      2. 10.2.2 Merge policy
      3. 10.2.3 Configuration for the split and merge policy
    3. 10.3 PowerHA quarantine policy
      1. 10.3.1 Active node halt quarantine policy
      2. 10.3.2 Disk fencing quarantine
      3. 10.3.3 Configuration of quarantine policies
    4. 10.4 Changes in split and merge policies in PowerHA V7.2.1
      1. 10.4.1 Configuring the split and merge policy by using SMIT
      2. 10.4.2 Configuring the split and merge policy by using clmgr
      3. 10.4.3 Starting cluster services after a split
      4. 10.4.4 Migration and limitation
    5. 10.5 Considerations for using split and merge quarantine policies
    6. 10.6 Split and merge policy testing environment
      1. 10.6.1 Basic configuration
      2. 10.6.2 Specific hardware configuration for some scenarios
      3. 10.6.3 Initial PowerHA service status for each scenario
    7. 10.7 Scenario: Default split and merge policy
      1. 10.7.1 Scenario description
      2. 10.7.2 Split and merge configuration in PowerHA
      3. 10.7.3 Cluster split
      4. 10.7.4 Cluster merge
      5. 10.7.5 Scenario summary
    8. 10.8 Scenario: Split and merge policy with a disk tie breaker
      1. 10.8.1 Scenario description
      2. 10.8.2 Split and merge configuration in PowerHA
      3. 10.8.3 Cluster split
      4. 10.8.4 How to change the tie breaker group leader manually
      5. 10.8.5 Cluster merge
      6. 10.8.6 Scenario summary
    9. 10.9 Scenario: Split and merge policy with the NFS tie breaker
      1. 10.9.1 Scenario description
      2. 10.9.2 Setting up the NFS environment
      3. 10.9.3 Setting the NFS split and merge policies
      4. 10.9.4 Cluster split
      5. 10.9.5 Cluster merge
      6. 10.9.6 Scenario summary
    10. 10.10 Scenario: Split and merge policy is manual
      1. 10.10.1 Scenario description
      2. 10.10.2 Split and merge configuration in PowerHA
      3. 10.10.3 Cluster split
      4. 10.10.4 Cluster merge
      5. 10.10.5 Scenario summary
    11. 10.11 Scenario: Active node halt policy quarantine
      1. 10.11.1 Scenario description
      2. 10.11.2 HMC password-less access configuration
      3. 10.11.3 HMC configuration in PowerHA
      4. 10.11.4 Quarantine policy configuration in PowerHA
      5. 10.11.5 Simulating a cluster split
      6. 10.11.6 Cluster merge occurs
      7. 10.11.7 Scenario summary
    12. 10.12 Scenario: Enabling the disk fencing quarantine policy
      1. 10.12.1 Scenario description
      2. 10.12.2 Quarantine policy configuration in PowerHA
      3. 10.12.3 Simulating a cluster split
      4. 10.12.4 Simulating a cluster merge
      5. 10.12.5 Scenario summary
  14. Chapter 11. IBM PowerHA SystemMirror special features
    1. 11.1 New option for starting PowerHA by using the clmgr command
      1. 11.1.1 PowerHA Resource Group dependency settings
      2. 11.1.2 Use case for using manage=delayed
  15. Appendix A. SCSI reservations
    1. SCSI reservations
    2. Persistent Reserve IN
    3. Storage
    4. More about PR reservations
    5. Persistent reservation commands
  16. Appendix B. IBM PowerHA: Live kernel update support
    1. Live kernel update support
    2. Example of live kernel update patching a kernel interim fix in a PowerHA environment
  17. Related publications
    1. IBM Redbooks
    2. Other publications
    3. Online resources
    4. Help from IBM
  18. Back cover