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by Robert Tondini, Peter Klee, Bert Dufrasne, Alcides Bertazi, Nick Clayton
DS8000 Global Mirror Best Practices
Front cover
Notices
Trademarks
Preface
Authors
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Chapter 1. Global Mirror overview and architecture
1.1 Global Mirror overview
1.1.1 Communication between primary disk systems
1.2 Setting up a Global Mirror session
1.2.1 A simple configuration
1.2.2 Establishing connectivity to a secondary site (PPRC paths)
1.2.3 Creating a Global Copy relationship
1.2.4 Introducing FlashCopy
1.2.5 Defining a Global Mirror session
1.2.6 Populating a Global Mirror session with volumes
1.2.7 Starting a Global Mirror session
1.3 Forming consistency groups
1.3.1 The different phases of consistency formation
1.3.2 Impact of the consistency formation process
1.3.3 Collisions
Chapter 2. Planning and implementation
2.1 Sizing tools for Global Mirror
2.1.1 RMF and RMF Magic
2.1.2 IBM Spectrum Control
2.1.3 Global Mirror Bandwidth/RPO estimation tool
2.1.4 Disk Magic
2.2 Global Mirror implementation planning
2.2.1 Growth within Global Mirror configurations
2.3 Configuration guidelines for primary and secondary
2.3.1 Primary disk system performance
2.3.2 Performance at distance
2.3.3 Secondary disk system performance
2.3.4 Volume placement on secondary disk system
2.3.5 Global Mirror secondary disk system recommendations
2.3.6 Taking advantage of Easy Tier
Chapter 3. Connectivity
3.1 Inter-site connectivity
3.2 Fibre Channel to IP conversion
3.3 Bandwidth estimation
3.4 Long-distance link considerations
3.4.1 Fibre Channel flow control
3.4.2 Configuring the FCIP gateway
3.4.3 Compression
3.5 DS8000 configuration considerations
Chapter 4. Performance tuning
4.1 Global Mirror/GlobalCopy data synchronization
4.2 Managing peak activity
4.3 Bandwidth reduction
4.4 Global Mirror tuning
4.4.1 Global Mirror externalized parameters
4.4.2 Pokeables or internal switches
4.4.3 Extreme distance tuning
4.4.4 Path and port configuration for optimal data transmission.
4.4.5 Environments with very low bandwidth
Chapter 5. Global Mirror recovery
5.1 Taking an additional copy for Disaster Recovery testing
5.2 General recovery principle
5.2.1 Planned recovery scenario
5.2.2 Unplanned recovery scenario
5.3 Autonomic behavior
5.3.1 PPRC paths
5.3.2 PPRC pairs
5.3.3 Global Mirror session
Chapter 6. Topologies and solution scenarios
6.1 Asymmetrical configuration
6.1.1 Return to primary site with asymmetrical Global Mirror configuration
6.2 Symmetrical configuration
6.3 Multiple Target PPRC with Global Mirror
6.3.1 Overview of a Metro Mirror and Global Mirror topology
6.4 Metro Global Mirror
6.5 Four-site configuration
6.6 Data Migration example scenario
6.6.1 Replacement of Global Mirror secondary DS8870 system
6.6.2 Replacement of Global Mirror primary DS8870 system
Chapter 7. Global Mirror management and disaster recovery solutions
7.1 Copy Services Manager
7.2 GDPS Global Mirror (GDPS/GM)
7.3 IBM System i PowerHA for i
7.4 VMware SRM
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Note: Before using this information and the product it supports, read the information in “Notices” on page v.
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