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IBM PowerHA SystemMirror for i: Using Geographic Mirroring (Volume 4 of 4)

Book Description

IBM® PowerHA® SystemMirror® for i is the IBM high-availability (HA), disk-based clustering solution for the IBM i operating system. When PowerHA for i is combined with IBM i clustering technology, PowerHA for i delivers a complete HA and disaster-recovery (DR) solution for business applications that are running in an IBM i environment. Use PowerHA for i to support HA capabilities with either native disk storage, IBM DS8000® storage servers, or IBM Storwize® storage servers.

This IBM Redbooks® publication helps you to install, tailor, and configure IBM PowerHA SystemMirror for i to use with geographic mirroring and native storage. This publication provides you with planning information to prepare to use the various PowerHA offerings with geographic mirroring with IBM i native storage. It also provides implementation and management information. It provides guidance about troubleshooting these solutions and identifies the documentation that you need to capture before you call IBM Support.

This book is part of a four-book set that gives you a complete understanding of PowerHA for i with native disk storage, IBM DS8000 storage servers, or IBM Storwize storage servers. The following IBM Redbooks publications are part of this PowerHA for i volume set:

  • IBM PowerHA SystemMirror for i: Preparation, SG24-8400

  • IBM PowerHA SystemMirror for i: Using DS8000, SG24-8403

  • IBM PowerHA SystemMirror for i: Using IBM Storwize, SG24-8402

  • Important: The information that is presented in this volume set is for technical consultants, technical support staff, IT architects, and IT specialists who are responsible for providing HA and support for IBM i solutions. If you are new to HA, you need to first review the information that is presented in the first book of this volume set, IBM PowerHA SystemMirror for i: Preparation (Volume 1 of 4), SG24-8400, to obtain a general understanding of clustering technology, independent auxiliary storage pools (IASPs), and the PowerHA architecture.

    Table of Contents

    1. Front cover
    2. Notices
      1. Trademarks
    3. IT Solutions Group, Inc.
    4. IBM Redbooks promotions
    5. Preface
      1. Authors
      2. Now you can become a published author, too!
      3. Comments welcome
      4. Stay connected to IBM Redbooks
    6. Chapter 1. Introduction to geographic mirroring
      1. 1.1 Value proposition
      2. 1.2 Concept of geographic mirroring
      3. 1.3 Prerequisites and editions
      4. 1.4 Modes of operation
    7. Chapter 2. Planning
      1. 2.1 Storage options
      2. 2.2 Synchronous and asynchronous mode considerations
        1. 2.2.1 Synchronous transmission mode
        2. 2.2.2 Asynchronous transmission mode
        3. 2.2.3 Geographic mirroring operations summary
      3. 2.3 Other geographic mirroring considerations
        1. 2.3.1 Tracking space
        2. 2.3.2 Suspend timeout
      4. 2.4 Communication considerations for geographic mirroring
        1. 2.4.1 Network topology and configuration
        2. 2.4.2 Synchronization priority
      5. 2.5 Determining bandwidth requirements
        1. 2.5.1 Calculating full synchronization time bandwidth
        2. 2.5.2 Calculating runtime bandwidth
      6. 2.6 System performance considerations
        1. 2.6.1 General performance guidelines
        2. 2.6.2 Production and backup system comparison
        3. 2.6.3 CPU considerations
        4. 2.6.4 Memory considerations
        5. 2.6.5 Disk subsystem considerations
      7. 2.7 Backup planning for geographic mirroring
    8. Chapter 3. Implementing geographic mirroring
      1. 3.1 Gathering information
      2. 3.2 Configuring geographic mirroring
    9. Chapter 4. Monitoring and managing IBM PowerHA SystemMirror for i
      1. 4.1 Monitoring your environment
        1. 4.1.1 QSYSOPR message queue
        2. 4.1.2 Monitoring the status of your replication
        3. 4.1.3 Monitoring the status of cluster nodes
        4. 4.1.4 Monitoring the status of the cluster administrative domain
        5. 4.1.5 Monitoring the cluster resource group status
        6. 4.1.6 Monitoring the status of the independent auxiliary storage pool
        7. 4.1.7 Other monitoring considerations
      2. 4.2 Managing your environment
        1. 4.2.1 Verifying the health of your replication solution
        2. 4.2.2 Adding users to the systems
        3. 4.2.3 Adding network printers and other SYSBAS objects to the systems
        4. 4.2.4 Powering down your system
        5. 4.2.5 Upgrading your operating system
        6. 4.2.6 Adding disks to an IASP in a PowerHA environment
        7. 4.2.7 Removing disks from an IASP in a PowerHA environment
        8. 4.2.8 Server replacement
        9. 4.2.9 Unconfiguring geographic mirroring
    10. Chapter 5. Switching a geographic mirroring environment
      1. 5.1 Synchronization
      2. 5.2 Planned switch
        1. 5.2.1 Performing a planned switch by using the PowerHA GUI
        2. 5.2.2 Performing the switch operation by using control language commands
        3. 5.2.3 Additional considerations when you use Storwize or DS8000 and FlashCopy
      3. 5.3 Unplanned site failover
        1. 5.3.1 Primary node failure that triggers an automatic failover event
        2. 5.3.2 Sudden primary node or cluster communications failure
    11. Chapter 6. Troubleshooting and collecting data for problem determination
      1. 6.1 Reducing the likelihood of errors
        1. 6.1.1 Verifying the PTF level for the system and PowerHA SystemMirror for i
        2. 6.1.2 Configuring and managing the PowerHA environment
      2. 6.2 Common tools and commands used for troubleshooting
        1. 6.2.1 MustGather Data Collector Tool (QMGTOOLS)
        2. 6.2.2 GEOSTAT
        3. 6.2.3 ASMINFO
        4. 6.2.4 DSMINFO
      3. 6.3 Methods for troubleshooting
        1. 6.3.1 Ensuring that job descriptions have the correct logging levels
        2. 6.3.2 Using the command line interface when you re-create problems
      4. 6.4 Common return codes when you manage geographic mirroring
    12. Appendix A. PowerHA Tools for IBM i
      1. PowerHA Tools for IBM i
      2. IBM Lab Services Offerings for PowerHA for IBM i
    13. Appendix B. Worksheet for configuring geographic mirroring
    14. Appendix C. Additional material
      1. Locating the web material
      2. Using the web material
    15. Related publications
      1. IBM Redbooks
      2. Online resources
      3. Help from IBM
    16. Back cover