DS8000 4-Site Replication with IBM Copy Services Manager

DS8000 4-Site Replication with IBM Copy Services Manager

by Thomas Luther, Peter Klee, Alexander Warmuth
Released February 2020
Publisher(s): IBM Redbooks
ISBN: 9780738458465

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Book description

This IBM® Redpaper publication helps you design and implement a 4-site replication solution for IBM DS8000® environments. IBM Copy Services Manager is used to orchestrate the data replication and failover and failback mechanisms between the different sites.

The IBM DS8000 Copy Services functions are the foundation of this 4-site replication solution. The four sites consist of two pairs of sites. Within each pair, the two sites are at metro distance, while the pairs connect at long distance over asynchronous links.

The solution is based on a Multi-Target PPRC topology that consists of a Metro Mirror replication to the secondary site in the local region and a Global Mirror replication to the third site in the remote region. The fourth site is set up as a cascaded Global Copy, which is an asynchronous copy.

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. Introducing 4-site replication
    1. 1.1 Overview
    2. 1.2 4-site concepts
      1. 1.2.1 4-site setup with High Availability per region
      2. 1.2.2 4-site setup with Disaster Recovery per region
    3. 1.3 Options
      1. 1.3.1 z/OS HyperSwap
      2. 1.3.2 Copy Service Manager
      3. 1.3.3 GDPS
  5. Chapter 2. Requirements
    1. 2.1 Hardware requirements
    2. 2.2 Software requirements
  6. Chapter 3. Setting up the 4-site environment
    1. 3.1 Metro Mirror - Global Mirror with 4-site replication session
    2. 3.2 Combining IBM z/OS HyperSwap with the 4-site session
  7. Chapter 4. Managing 4-site replication by using CSM
    1. 4.1 Overview
      1. 4.1.1 Exploring the 4-site session
      2. 4.1.2 General operational steps
      3. 4.1.3 State and Status
      4. 4.1.4 Normal operations
    2. 4.2 Planned site failover scenarios
      1. 4.2.1 Site failover from H1 to H2
      2. 4.2.2 Region failover from H1 to H3
      3. 4.2.3 Site failover from H3 to H4
      4. 4.2.4 Region failover from H2 to H3
      5. 4.2.5 Region failover from H4 to H1
    3. 4.3 Practice scenarios
      1. 4.3.1 General overview
      2. 4.3.2 Practice failover at the Metro Mirror target site
      3. 4.3.3 Practice failover at Global Mirror target site
      4. 4.3.4 Practice failover at fourth site
    4. 4.4 Creating a Golden Copy at fourth site
    5. 4.5 Unplanned scenarios
      1. 4.5.1 Outage of the production site
      2. 4.5.2 Outage of a target site
    6. 4.6 Back-out scenarios
      1. 4.6.1 Back-out to H1 from planned H2 recovery
      2. 4.6.2 Back-out to H3 from unplanned H2 recovery
      3. 4.6.3 Back-out to H4 from unplanned H3 recovery
      4. 4.6.4 Back-out to restored Golden Copy from unplanned H3 recovery
  8. Appendix A. Automation
    1. A.1 CSM scheduled task
    2. A.2 Scheduled task examples for 4-site session
  9. Related publications
    1. IBM Redbooks
    2. Online resources
    3. Help from IBM
  10. Back cover

Product information

  • Title: DS8000 4-Site Replication with IBM Copy Services Manager
  • Author(s): Thomas Luther, Peter Klee, Alexander Warmuth
  • Release date: February 2020
  • Publisher(s): IBM Redbooks
  • ISBN: 9780738458465