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

Configuring the Site Controller Package..............................................................................390
Configuring the Site Safety Latch Dependencies...................................................................390
Starting the Disaster Tolerant Oracle RAC Database with ASM in the Metrocluster....................391
Understanding Failure Scenarios in a Site Aware Disaster Tolerant Architecture.............................391
Failure Scenarios in a Complex Workload..........................................................................391
Site Failover ..............................................................................................................391
Node Failure and Rejoining the Cluster..........................................................................392
Network Partitions Across Sites......................................................................................393
Disk Array and SAN Failure.........................................................................................393
Replication Link Failure.................................................................................................393
Site Controller Package Failure......................................................................................393
Site Failure.................................................................................................................394
Failure Scenarios in Metrocluster for RAC............................................................................394
Oracle RAC Database Failure ......................................................................................394
Oracle RAC Database Instance Failure...........................................................................394
Oracle RAC Database Oracle Clusterware Daemon Failure..............................................395
Administering the Site Aware Disaster Tolerant Metrocluster Environment......................................395
Administering the SADTA Configuration..............................................................................395
Maintaining a Node...................................................................................................395
Maintaining the Site....................................................................................................396
Maintaining the Metrocluster Environment File.................................................................396
Moving the Site Controller Package to a Node at the Local Site.........................................396
Maintaining Site Controller Package..............................................................................396
Upgrading the Site Controller Package...........................................................................397
Deleting the Site Controller Package..............................................................................397
Starting a Complex Workload......................................................................................398
Shutting Down a Complex Workload.............................................................................398
Moving a Complex Workload to the Remote Site.............................................................398
Restarting a Failed Site Controller Package.....................................................................399
Migrating Complex Workloads Using Legacy SG SMS CVM/CFS Packages to Modular SG
SMS CVM/CFS Packages with Minimal Downtime..........................................................399
Administering Metrocluster for RAC....................................................................................400
Online Addition and Deletion of Nodes.........................................................................400
Adding Nodes Online on a Primary Site where the RAC Database is Running................400
Adding Nodes Online on a Remote Site where the RAC Database is Down...................401
Deleting Nodes Online on the Primary Site where the RAC Database Package Stack is
Running................................................................................................................401
Deleting Nodes Online on the Site where the RAC Database Package Stack is Down......402
Starting a Disaster Tolerant Oracle Database 10gR2 RAC................................................402
Shutting Down a Disaster Tolerant Oracle Database 10gR2 RAC.......................................403
Halting and Restarting the RAC Database MNP Packages................................................403
Maintaining Oracle Database 10gR2 RAC MNP packages on a Site.................................403
Maintaining Oracle Database 10gR2 RAC.....................................................................404
Moving a Site Aware Disaster Tolerant Oracle RAC Database to a Remote Site...................404
Limitations of a Site Aware Disaster Tolerant Architecture...........................................................405
Troubleshooting....................................................................................................................405
Logs and Files.................................................................................................................405
Cleaning the Site to Restart the Site Controller Package.........................................................405
Identifying and Cleaning RAC MNP Stack Packages that are Halted.......................................406
Understanding Site Controller Package Logs........................................................................407
8 Designing a Three Data Center Disaster Recovery Solution...........................413
Overview of 3DC DR Solution................................................................................................413
Overview of Continuous Access 3DC Replication Technology................................................414
Benefits of 3DC DR Solution..............................................................................................423
14 Contents