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Understanding OracleAS 10g High Availability - A Roadmap (Doc ID 412159.1)

Last updated on JUNE 03, 2024

Applies to:

Oracle Fusion Middleware High Availability - Version to [Release AS10gR2 to AS10gR3]
Oracle Fusion Middleware - Version to [Release AS10gR2 to AS10gR3]
Information in this document applies to any platform.
Oracle Application Server 10g Enterprise Edition - Version: to


The base OracleAS architecture supports many availability features, such as automatic process monitoring and restart (OPMN), application server backup and recovery (via scripts or AS Console). It does not, however, provide complete high availability. Several single points of failure exist. To eliminate them, redundancy has to be provided for each component. This can be achieved by extending the base architecture with additional high availability architectures

The objective of this article is to provide an overview and a roadmap with regards to the topic of Oracle Application Server High Availability (HA). This is a complex subject area which is documented in a number of different places. The article contains:

The article does not intend to provide a step by step technical guide to implementing the various OracleAS HA topologies as this detail can be ascertained from the documentation.


The article is intended for system architects / administrators, consultants, support engineers who first getting to know the subject of OracleAS High Availability and are looking for a good place to start.

The reader should already be familiar with the basic Oracle Application Server architecture and different install types.  


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In this Document
 Initial Understanding
 What HA topology to choose?
 Is there a best solution?
 Return on Investment
 First Steps - Where to look for instructions?
 Create a Topology Diagram
 Install Infrastructure First
 Is it possible to transform a non-HA OracleAS setup to a HA setup?
 Following the Documentation

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