Understanding and Designing Serviceguard Disaster Recovery Architectures

N-1 Bidirectional configuration........................................................................................31
Continentalclusters With Cascading Failover.....................................................................31
Cascading Failover Using Metrocluster........................................................................32
Features of Continentalclusters ............................................................................................33
Cluster Event Notifications..............................................................................................33
Push-button Recovery.....................................................................................................33
Highly available monitoring............................................................................................33
Integration with array based replication...........................................................................34
Integration with software based replication.......................................................................34
Continentalclusters Maintenance mode............................................................................34
Disaster Recovery Rehearsal...........................................................................................34
Site Controller support...................................................................................................35
Data Replication Storage Failover Preview........................................................................35
General Requirements....................................................................................................35
Benefits of Continentalclusters..............................................................................................35
Understanding Site Aware Disaster Recovery Architecture Concepts..............................................36
Terms and Concepts...........................................................................................................37
Sites............................................................................................................................37
Complex Workload.......................................................................................................37
Critical and managed packages................................................................................37
Root package in a complex workload.........................................................................37
Site Controller Package..................................................................................................38
Site Safety Latch............................................................................................................38
Types of Configuration........................................................................................................38
Metrocluster SADTA configuration....................................................................................38
Continentalclusters SADTA configuration...........................................................................39
Features of SADTA ............................................................................................................40
Simplified Disaster Recovery for complex workloads..........................................................40
Site Preferred failover policy...........................................................................................40
Support for Oracle RAC and CFS....................................................................................40
Support for all Metrocluster products................................................................................41
UnderstandingThree Data Center Disaster Recovery Solution........................................................41
Understanding Virtualized Environments configured in Metrocluster or Continentalclusters.................41
Types of Configuration........................................................................................................42
Virtualized Environments as a Serviceguard Package in a Metrocluster or Continentalclusters.......42
Virtualized Environments as a Serviceguard Node in a Metrocluster or Continentalclusters...........44
Virtual Partitions/Integrity VM on Separate Hosts...............................................................45
Multiple Virtual Partitions/Integrity VM on a single Host.....................................................45
Combination of Physical Hosts and Virtual Environments.....................................................46
3 Extended Distance Cluster Configurations....................................................48
Benefits of Extended Distance Cluster........................................................................................52
Benefits of Extended Distance Cluster for RAC............................................................................53
Support for Cross-Subnet Configurations in Extended Clusters.......................................................53
Configuration Requirements for all Extended Distance Clusters......................................................54
Special Requirements and Recommendations for using LVM and SLVM in Extended Clusters.............55
Special Requirements and Recommendations for using VxVM, CVM and CFS in Extended Clusters....57
Recommendations and Requirements for EC RAC Configurations with Oracle RAC 10g or 11g..........58
TCP/IP Network and Fibre Channel Data Links between the Data Centers......................................58
Separate Links for TCP/IP Networking and Fibre Channel Data....................................................58
Common WDM Links for both TCP/IP Networking and Fibre Channel Data...................................59
Common SONET or SDH Links for both TCP/IP Networking and Fibre Channel Data......................60
Extended Distance Cluster with two Data Centers........................................................................61
Extended Distance Cluster configurations with Two Data Centers and a Third Location.....................61
4 Contents