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Arbitration For Data Integrity in Serviceguard Clusters:
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HP Part Number: B3936-90078

Published: July 2007

Table of Contents

1 Arbitration for Data Integrity in Serviceguard Clusters
Cluster Membership Concepts
Membership
Quorum
Split-Brain
Tie-Breaking
To Arbitrate or Not to Arbitrate
No Arbitration—Multiple Paths
No Arbitration—Multiple Media
No Arbitration—Risks
How Serviceguard Uses Arbitration
Cluster Startup
Startup and Re-Formation
Dynamic Cluster Re-Formation
Cluster Quorum and Cluster Locking
Use of a Lock Disk as the Cluster Lock
Single Cluster Lock
Dual Cluster Lock
Use of a Lock LUN as the Cluster Lock
Use of a Quorum Server as the Cluster Lock
Setting up the Quorum Server
Use of Arbitrator Nodes
Arbitration in Disaster-Tolerant Clusters
Extended Distance Clusters
Metropolitan Clusters
Continental Clusters
Use of Dual Lock Disks in Extended Distance Clusters
Summary
Index

List of Figures

1-1 Multiple Heartbeat Failures
1-2 Single Node Failure
1-3 Multiple Paths with Different Media
1-4 Additional Multiple Paths with Different Media
1-5 Lock Disk Operation
1-6 Lock LUN Operation
1-7 Quorum Server Operation
1-8 Use of Arbitrator Node
1-9 Dual Lock Disk Configuration

List of Tables

1-1 Comparison of Different Arbitration Methods
   


Chapter 1 Arbitration for Data Integrity in Serviceguard Clusters  
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