SVC and Storwize V7000 Replication Family Services Chapter 4
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Front cover IBM System Storage SAN Volume Controller and Storwize V7000 Replication Family Services Describes new Replication Family Services functionality Provides server integration examples Includes scripting examples Jon Tate Rafael Vilela Dias Ivaylo Dikanarov Jim Kelly Peter Mescher ibm.com/redbooks International Technical Support Organization IBM System Storage SAN Volume Controller and Storwize V7000 Replication Family Services March 2013 SG24-7574-02 Note: Before using this information and the product it supports, read the information in “Notices” on page xi. Third Edition (March 2013) This edition applies to IBM System Storage SAN Volume Controller and IBM System Storage Storwize V7000 Replication Family Services at an SVC Version6.4 code level. © Copyright International Business Machines Corporation 2013. All rights reserved. Note to U.S. Government Users Restricted Rights -- Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp. Contents Notices . xi Trademarks . xii Summary of changes. xiii March 2013, Third Edition . xiii Preface . .xv The team who wrote this book . .xv Now you can become a published author, too! . xvii Comments welcome. xviii Stay connected to IBM Redbooks . xviii Chapter 1. Introduction to Replication Family Services . 1 1.1 FlashCopy . 2 1.2 Metro Mirror and Global Mirror . 2 1.2.1 Global Mirror with Change Volumes . 2 1.3 Volume Mirroring function . 2 1.3.1 Stretched Cluster Volume Mirroring . 3 Chapter 2. Planning for Replication Family Services . 5 2.1 High-level design. 6 2.1.1 Defining your project . 6 2.1.2 Functional requirements . 6 2.1.3 Non-functional requirements. 7 2.1.4 Prior to implementation . 7 2.2 Business continuity and productivity goals . 8 2.2.1 Data protection . 8 2.2.2 Storage efficiency . 8 2.3 High availability . 9 2.3.1 Volume Mirroring for high availability . 9 2.3.2 SVC Stretched Cluster for high availability . 9 2.4 Backup and restore . 10 2.4.1 FlashCopy for backup and restore . 10 2.4.2 Using Reverse FlashCopy to restore a volume. 11 2.4.3 Backup and restore references. 12 2.5 Disaster recovery . 12 2.5.1 Disaster recovery site location . 13 2.5.2 Metro Mirror for disaster recovery. 14 2.5.3 Global Mirror for disaster recovery . 14 2.5.4 FlashCopy in a Metro or Global Mirror recovery . 14 2.5.5 Global Mirror with Change Volumes for disaster recovery . 15 2.5.6 SVC Stretched Cluster for disaster recovery . 16 2.5.7 Three-site replication for disaster recovery. 17 2.5.8 Further reading for disaster recovery . 17 2.6 Creating volume copies. 17 2.6.1 Single Volume Mirroring . 17 2.6.2 FlashCopy (volumes and Consistency Groups) . 18 2.6.3 Metro or Global Mirror. 19 2.7 Moving volumes . 19 © Copyright IBM Corp. 2013. All rights reserved. iii 2.7.1 migratevdisk . 19 2.7.2 Volume Mirroring usage . 19 2.7.3 movevdisk . 19 2.7.4 Metro or Global Mirror. 20 2.8 Capacity planning . 20 2.8.1 Performance monitoring on SVC and Storwize V7000 . 21 2.8.2 Using Disk Magic to predict the impact of Metro and Global Mirror . 23 2.8.3 FlashCopy considerations for disk performance. 26 2.8.4 Grain size . 26 2.9 Planning for supportability. 27 2.9.1 Understanding consistency. 27 2.9.2 Planning for host attachments . 30 2.9.3 Extended Quorum Support for SVC Stretched Cluster. 32 2.9.4 Support Notifications. 33 Chapter 3. Metro Mirror and Global Mirror . 35 3.1 Terminology . 36 3.2 Metro and Global Mirror overview . 36 3.3 Partnerships between systems . 37 3.3.1 Layer concept . 39 3.3.2 Partnership topologies . 40 3.3.3 Partnership heartbeat . 42 3.4 Network connectivity for Metro and Global Mirror . 42 3.4.1 Fibre Channel over Ethernet (FCoE) . 43 3.4.2 Planning your network for Metro or Global Mirror . 45 3.5 Relationships between volumes or Consistency Groups . 46 3.5.1 Consistency Groups . 47 3.6 Initial synchronization . 48 3.6.1 Default synchronization across the network . 48 3.6.2 Tape-based synchronization. ..