Chapter 7 Designing a Disaster Tolerant Solution Using Site Aware Disaster Tolerant Architecture

Table of Contents

Overview of Site Aware Disaster Tolerant Architecture

Complex Workload Configuration
Components of SADTA
Site
Oracle Clusterware Sub-cluster
Cluster File System Sub-cluster
Complex Workload Redundant Configuration
Site Controller Package
Site Safety Latch

Configuring Complex Workloads using Site Aware Disaster Tolerant Architecture

Overview of SADTA Configuration
Configuring a Complex Workload in SADTA
Configuring Metrocluster for RAC

Configuring Oracle RAC Database in a Site Aware Disaster Tolerant Architecture

Summary of Required Procedures
Sample Configuration
Configuring SADTA
Setting up Replication
Configuring Metrocluster
Installing and Configuring Oracle Clusterware
Installing and Configuring Oracle Real Application Clusters (RAC)
Creating the RAC Database
Creating Identical RAC Database at the Remote Site
Configuring the Site Controller Package
Configuring the Site Safety Latch Dependencies
Starting the Disaster Tolerant RAC Database in the Metrocluster
Configuring Client Access for Oracle Database 10gR2 RAC
Configuring SGeRAC Cluster Interconnect Subnet Monitoring
Configuring and Administration Restrictions

Understanding Failure Scenarios in a Site Aware Disaster Tolerant Architecture

Failure Scenarios in a Complex Workload
Failure Scenarios in Metrocluster for RAC

Administering the Site Aware Disaster Tolerant Metrocluster Environment

Administering the SADTA Configuration
Administering Metrocluster for RAC

Limitations of a Site Aware Disaster Tolerant Architecture

Troubleshooting

Logs and Files
Cleaning the Site to Restart the Site Controller Package
Identifying and Cleaning RAC MNP Stack Packages that are Halted
Understanding Site Controller Package Logs

This chapter describes Site Aware Disaster Tolerant Architecture (SADTA) for deploying complex workloads with inter-dependent packages that are managed collectively for disaster tolerance in Metrocluster. SAP and Oracle RAC database, which includes 10gR2 RAC and 11gR1 RAC, are some examples of complex workloads.

Special software features such as Site Controller Package, and Site Safety Latch, provide robust automatic failover of the multi-instance workload between the two sites.

This chapter addresses the following topics:

Chapter 7 Designing a Disaster Tolerant Solution Using Site Aware Disaster Tolerant Architecture

Technical documentation

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