Discover How To Leverage The Power Of The Grid

What is a Cluster?

A group of independent computers working together as a single system

• Availability – Continues running in case of a hardware or software failure
• Scalability – New nodes can be added to a cluster to accommodate increased workload
• Performance – Workload can be distributed among nodes for optimal performance
• Requires
  • hardware (interconnect)
  • software (clusterware)

Agenda

• Cluster Overview
• Real Application Clusters Overview
• RAC Benefits
• RAC Scalability Proof
• RAC Validation Overview

Real Application Clusters what is it?

• Multiple Oracle instances running on multiple nodes and sharing a single physical database
• All instances have common data, control, and initialization files
• Each instance has individual shared log files and rollback segments or undo tablespaces
• All instances can simultaneously execute transactions against the single database
• Caches are synchronized using Oracle’s Global Cache Management technology (Cache Fusion)

RAC Validation Methodology

1. Install & Configure Cluster HW System
2. Install Oracle Clusterware, RAC on Cluster Nodes
3. Install application / Create database
4. Application functionality test across multiple nodes
5. Load test application on single node to obtain baseline
6. Load test 2-nodes
7. If application does not scale near-linearly, determine performance bottleneck(s) and fix
8. In most cases, tune single node & repeat from step 5
9. Failover testing – Configure Appropriate Method
10. Kill instance/node, observe result

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