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Configure Oracle Real Application Cluster (RAC) with the application server

Oracle Real Application Cluster (RAC) is a "share-everything" database architecture in which two or more Oracle RAC nodes are clustered together and share the same storage. The RAC nodes are connected together with a high-speed interconnect that enables fast communication between the Oracle nodes. The nodes can exchange various categories of data block ownership information during startup, lock information, exchange transaction information and data, and so on.

Use the Oracle JDBC driver, we can configure failover support, load balancing, or both, in an Oracle Real Application Clusters (RAC) environment. Oracle RAC is an option of an Oracle database that brings together two or more computers to form a clustered database that behaves as a single system. In a RAC database, Oracle processes that are running in separate nodes access the same data from a shared disk storage. First introduced in Oracle Version 9i, RAC provides both high availability and flexible scalability.

A typical Oracle RAC cluster consists of the following:

The following figure depicts a typical configuration for Oracle RAC:

Here are two of the many features that Oracle RAC provides:

For more information on Oracle RAC and how it works with the application server, refer to Building a high availability database environment using WebSphere middleware: Part 3: Handling two-phase commit in WAS using Oracle RAC on the developerWorks website.


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Reference:

Building a high availability database environment using WebSphere middleware: Part 3: Handling two-phase commit in WAS using Oracle RAC


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