READ ME before using the Veritas Storage Foundation™ 5.1 SP1 for Oracle RAC Administrator's Guide (April 2011)

Contents
Preface........................................................................................................5
Publishing History.....................................................................................................................5
1 Overview..................................................................................................6
2 Introducing Serviceguard Extension for RAC...................................................7
About Serviceguard Extension for RAC........................................................................................7
How Serviceguard Extension for RAC Works (High-Level Perspective)...............................................8
Component Products and Processes of SG SMS Serviceguard Cluster File System for RAC..................9
Communication Infrastructure...................................................................................................10
Data Flow.........................................................................................................................10
Communication Requirements..............................................................................................10
Cluster Interconnect Communication Channel.............................................................................11
Low Latency Transport.........................................................................................................11
Group Membership Services/Atomic Broadcast.....................................................................11
Cluster Membership......................................................................................................11
Cluster Communications.................................................................................................12
Low-level Communication: Port Relationship Between GAB and Processes.......................................12
Cluster Volume Manager.........................................................................................................12
CVM Architecture..............................................................................................................12
CVM Communication.........................................................................................................13
Port W.........................................................................................................................13
Port V..........................................................................................................................13
Cluster File System..................................................................................................................13
CFS Architecture................................................................................................................13
CFS Communication...........................................................................................................14
Oracle Disk Manager.............................................................................................................14
ODM Architecture..............................................................................................................14
ODM Performance Enhancements........................................................................................14
ODM Communication........................................................................................................14
Additional Features of Serviceguard Extension for RAC................................................................14
3 About CVM and CFS in an SGeRAC Environment.........................................16
About CVM and CFS in an SGeRAC Environment.......................................................................16
About CVM......................................................................................................................16
CVM Configuration Differences.......................................................................................16
CVM Recovery..............................................................................................................16
About CFS........................................................................................................................16
CFS File System Benefits.................................................................................................16
CFS Configuration Differences.........................................................................................17
CFS Recovery...............................................................................................................17
Coordinating CVM and CFS Configurations..........................................................................17
About Shared Disk Groups..................................................................................................18
Viewing Information on a Disk Group .............................................................................18
Checking the Connectivity Policy on a Shared Disk Group..................................................18
Determining Whether a Node is CVM Master or Slave......................................................18
Enabling Write Access to Volumes in the Disk Groups........................................................18
Deporting and Importing Shared Disk Groups...................................................................19
Reviewing Limitations of Shared Disk Groups....................................................................19
Contents 3