Designing Disaster Recovery Clusters using Metroclusters and Continentalclusters, Reprinted October 2011 (5900-1881)

Contents
Printing History...........................................................................................17
Preface......................................................................................................19
Guide to Disaster Recovery Solutions Documentation...................................................................20
1 Designing a Metrocluster...........................................................................23
Designing a Disaster Recovery Architecture for use with Metrocluster Products.................................23
Single Data Center............................................................................................................24
Two Data Centers and Third Location with Arbitrator(s)...........................................................24
Site Aware Failover Configuration...................................................................................26
Volume Monitor Configuration........................................................................................28
Arbitrator Node Configuration Rules................................................................................29
Disk Array Data Replication Configuration Rules................................................................29
Calculating a Cluster Quorum.........................................................................................29
Example Failover Scenarios with One Arbitrator................................................................29
Example Failover Scenarios with Two Arbitrators...............................................................30
Worksheets............................................................................................................................31
Disaster Tolerant Checklist...................................................................................................31
Cluster Configuration Worksheet..........................................................................................32
Package Configuration Worksheet........................................................................................32
Next Steps.............................................................................................................................35
2 Designing Continentalclusters.....................................................................36
Understanding Continentalclusters Concepts...............................................................................36
Mutual Recovery Configuration............................................................................................38
Application Recovery in Continentalclusters...........................................................................39
Monitoring over a Network.................................................................................................40
Cluster Events....................................................................................................................40
Interpreting the Significance of Cluster Events........................................................................41
How Notifications Work.....................................................................................................41
Alerts...............................................................................................................................41
Alarms.............................................................................................................................42
Creating Notifications for Failure Events................................................................................42
Creating Notifications for Events that Indicate a Return of Service.............................................42
Maintenance Mode for Recovery Groups..............................................................................42
Moving a Recovery Group into Maintenance Mode...........................................................43
Moving a Recovery Group out of the Maintenance Mode...................................................44
Performing Cluster Recovery................................................................................................44
Performing Recovery Group Rehearsal in Continentalclusters....................................................45
Notes on Packages in Continentalclusters..............................................................................46
Startup and Switching Characteristics...............................................................................46
Network Attributes........................................................................................................47
How Serviceguard commands work in a Continentalclusters....................................................47
Designing a Disaster Recovery Architecture for use with Continentalclusters....................................48
Mutual Recovery................................................................................................................48
Serviceguard Clusters.........................................................................................................48
Data Replication................................................................................................................49
Physical Data Replication ..............................................................................................50
Using Modular Packages................................................................................................50
Using Legacy Packages..................................................................................................50
Multiple Recovery Pairs in Continentalclusters....................................................................51
Highly Available Wide Area Networking..............................................................................51
Data Center Processes .......................................................................................................52
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