Best Practices for DS8000 and z/OS HyperSwap with Copy Services Manager

Best Practices for DS8000 and z/OS HyperSwap with Copy Services Manager

by Thomas Luther, Alexander Warmuth. Marcelo Takakura
Released June 2019
Publisher(s): IBM Redbooks
ISBN: 9780738457611

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Book description

Many IBM® z/OS® customers require their applications to be available 24x7. Whether the business requirements are high availability (HA), disaster recovery (DR), or business continuity, IBM HyperSwap® technology can provide an adequate solution. HyperSwap is the industry standard and is provided as several different implementation options to meet the various business needs of the IBM System z® and z/OS customer base.

IBM Copy Services Manager (CSM) enables you to manage z/OS HyperSwap and helps you manage planned and unplanned actions in an z/OS environment from an open systems environment.

This IBM Redbooks® publication provides best practices for the planning, implementing, integrating, and managing z/OS HyperSwap with CSM.

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. Part 1 Introduction and planning
  5. Chapter 1. Introduction
    1. 1.1 IBM Copy Services Manager overview
    2. 1.2 CSM licenses
      1. 1.2.1 CSM licenses for z/OS platforms
      2. 1.2.2 CSM licenses for distributed server platforms
    3. 1.3 z/OS HyperSwap overview
      1. 1.3.1 z/OS HyperSwap: Not so basic anymore
      2. 1.3.2 CSM sessions that support HyperSwap
      3. 1.3.3 z/OS HyperSwap functions
      4. 1.3.4 HyperSwap sequence
      5. 1.3.5 Planned and unplanned HyperSwap
    4. 1.4 CSM and HyperSwap communication flow
    5. 1.5 GDPS Metro solutions
    6. 1.6 IBM Resiliency Orchestration and CSM
  6. Chapter 2. IBM Copy Services Manager and IBM z/OS HyperSwap implementation topologies
    1. 2.1 CSM connection type overview
      1. 2.1.1 TCP/IP-based connections to storage systems
      2. 2.1.2 FICON based connections to storage systems
      3. 2.1.3 Host connections to z/OS LPARs
    2. 2.2 z/OS relevant address spaces for CSM
      1. 2.2.1 HyperSwap or Hardened Freeze address spaces
      2. 2.2.2 z/OS IP host connection relevant address spaces
      3. 2.2.3 z/OS CSM Server relevant address spaces
      4. 2.2.4 Summary of relevant z/OS address spaces
    3. 2.3 Implementation scenarios
      1. 2.3.1 General considerations for all implementation scenarios
      2. 2.3.2 IBM z/OS CSM server Basic Edition implementation
      3. 2.3.3 CSM server on z/OS with standby CSM on z/OS
      4. 2.3.4 CSM server on z/OS with standby on distributed platform
      5. 2.3.5 HyperSwap management by CSM servers outside of Sysplex
      6. 2.3.6 HyperSwap management by CSM servers on DS8880 HMCs
      7. 2.3.7 Cascaded MGM or Multi Target MM-GM with local HyperSwap
      8. 2.3.8 Multi Target MM-MM with 3-site HyperSwap
      9. 2.3.9 CSM servers with FICON only storage connections
  7. Chapter 3. Prerequisites for various implementation topologies
    1. 3.1 TCP/IP Communication requirements
    2. 3.2 Prerequisites for z/OS HyperSwap
      1. 3.2.1 IBM z/OS APARs for HyperSwap and other CSM functions
      2. 3.2.2 z/OS APARs for Multiple Target Peer-to-Peer Remote Copy and HyperSwap
      3. 3.2.3 z/OS HyperSwap configuration prerequisites
    3. 3.3 Prerequisites for z/OS IP host connections
    4. 3.4 Prerequisites for DS8000 storage controllers
    5. 3.5 Prerequisites for Hitachi Virtual Storage Platform storage controllers
  8. Part 2 Installation and Configuration
  9. Chapter 4. CSM Installation on IBM z/OS
    1. 4.1 SMPE installation
    2. 4.2 Post SMPE installation tasks
      1. 4.2.1 Create Users
      2. 4.2.2 Create and mount the CSM file system
      3. 4.2.3 Perform CSM installation in UNIX System Services
      4. 4.2.4 Create started tasks for CSM server
    3. 4.3 Update the CSM installation
  10. Chapter 5. IBM z/OS IP host connection setup
    1. 5.1 Configuration tasks overview
    2. 5.2 Disable encryption for z/OS IP host connections
    3. 5.3 Configure z/OS users for HyperSwap tasks and z/OS IP host connections
    4. 5.4 Configure HyperSwap tasks with socket port
    5. 5.5 Create z/OS certificates
      1. 5.5.1 Certificate considerations when multiple LPARs connect to CSM server
      2. 5.5.2 CA Certificate generation
      3. 5.5.3 Create server certificate and keyring
      4. 5.5.4 Sample CLISTs
    6. 5.6 Export CA certificate
    7. 5.7 Configure AT-TLS policy
    8. 5.8 Configure the z/OS TCP/IP policy agent (PAGENT)
    9. 5.9 Generate a Java keystore file for the CSM server
      1. 5.9.1 Create Java keystore file
      2. 5.9.2 Transfer the keystore file to the CSM servers
    10. 5.10 Create the CSM IP host connection
    11. 5.11 Troubleshoot CSM z/OS IP host connection errors
  11. Chapter 6. Implementing z/OS HyperSwap
    1. 6.1 HyperSwap address spaces and started tasks
    2. 6.2 IBM z/OS configuration for HyperSwap
      1. 6.2.1 Install the latest PTFs for z/OS HyperSwap
      2. 6.2.2 HyperSwap related console commands
      3. 6.2.3 Enable critical paging
      4. 6.2.4 Sharing volumes with systems outside the Sysplex
      5. 6.2.5 Hardware reservations
      6. 6.2.6 Message control
      7. 6.2.7 Reduce delays of HyperSwap triggers
      8. 6.2.8 Enable I/O timeouts to trigger a HyperSwap
      9. 6.2.9 Couple Data Set considerations
      10. 6.2.10 IPL considerations
      11. 6.2.11 Allocation and esoteric names
      12. 6.2.12 JES3 considerations
      13. 6.2.13 JES2 considerations
      14. 6.2.14 Enhanced Catalog Sharing considerations
      15. 6.2.15 Cache fast write avoidance
      16. 6.2.16 Concurrent Copy avoidance
      17. 6.2.17 Z Global Mirror (XRC) interactions
      18. 6.2.18 FlashCopy usage in a HyperSwap environment
      19. 6.2.19 Coexistence with other products that use UCB swaps
      20. 6.2.20 Special HyperSwap considerations for use with other applications
      21. 6.2.21 SMF Recording
  12. Part 3 Management and Operations
  13. Chapter 7. Managing z/OS HyperSwap with IBM Copy Services Manager
    1. 7.1 Prepare session and enable HyperSwap
      1. 7.1.1 Assign discovered Sysplex to CSM session
      2. 7.1.2 Enable HyperSwap for a session
      3. 7.1.3 HyperSwap configuration settings
      4. 7.1.4 HyperSwap active
      5. 7.1.5 Check HyperSwap status in z/OS
    2. 7.2 HyperSwap usage scenarios
      1. 7.2.1 General remarks about CSM session management
      2. 7.2.2 Starting a HyperSwap session
      3. 7.2.3 Planned HyperSwap
      4. 7.2.4 Resynchronizing replication after a HyperSwap
      5. 7.2.5 Further considerations
    3. 7.3 Characteristics of different HyperSwap capable session types
      1. 7.3.1 Basic HyperSwap session
      2. 7.3.2 Three-site session types with remote replication for disaster recovery
      3. 7.3.3 Three-site Multiple Target MM - MM session
      4. 7.3.4 Four-site session MM - GM w/ Site 4 Replication
      5. 7.3.5 HyperSwap management for asymmetrical replication topologies
  14. Chapter 8. Additional operational considerations
    1. 8.1 CSM monitoring, logging and alerting
      1. 8.1.1 CSM monitoring
      2. 8.1.2 CSM logging
      3. 8.1.3 CSM alerting
    2. 8.2 Operational considerations for z/OS
      1. 8.2.1 z/OS HyperSwap commands
      2. 8.2.2 z/OS messages related to HyperSwap
      3. 8.2.3 HyperSwap alerting
      4. 8.2.4 HyperSwap sequence logging example
      5. 8.2.5 HyperSwap failures
    3. 8.3 Testing unplanned HyperSwap
      1. 8.3.1 z/OS initiated unplanned HyperSwap
      2. 8.3.2 Forcing an IO error to trigger an unplanned HyperSwap
    4. 8.4 Reconfigure replicated Count Key Data storage devices
      1. 8.4.1 Relabel existing replication devices
      2. 8.4.2 Create new replication devices
      3. 8.4.3 Delete existing replication devices
      4. 8.4.4 Resize existing replication devices
    5. 8.5 Troubleshooting
      1. 8.5.1 Recovering boxed devices
      2. 8.5.2 Resolving fenced devices
      3. 8.5.3 Recovering from Secondary In Use By System
      4. 8.5.4 Recovering from missing or stale NED
      5. 8.5.5 Additional hints and tips
      6. 8.5.6 Creating support information
  15. Appendix A. Checklists
    1. Checklist for implementation planning
    2. Checklist for CSM installation on z/OS
    3. Checklist for z/OS IP host connection setup
    4. Checklist for z/OS HyperSwap implementation
  16. Related publications
    1. References
    2. IBM Redbooks
    3. Help from IBM
  17. Back cover

Product information

  • Title: Best Practices for DS8000 and z/OS HyperSwap with Copy Services Manager
  • Author(s): Thomas Luther, Alexander Warmuth. Marcelo Takakura
  • Release date: June 2019
  • Publisher(s): IBM Redbooks
  • ISBN: 9780738457611