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OracleAS 10gR2 Disaster Recovery Using AS Guard: Middle and Collocated Infrastructure Tiers on the Same Server (Doc ID 420824.1)

Last updated on JUNE 01, 2023

Applies to:

Oracle Fusion Middleware - Version to [Release AS10gR2]
Oracle Fusion Middleware High Availability - Version to [Release AS10gR2]
Information in this document applies to any platform.


The purpose of this article is to demonstrate a simple symmetric OracleAS 10g Rel 2 Disaster Recovery environment using AS Guard.

The intended audience is Oracle Application Server 10g R2 Administrators

The steps outlined below were tested in the following environment:

Primary and <STANDBY SHORT HOSTNAME> sites have a single Linux 32bit Red Hat AS 4 machines hosting:

  * A OracleAS 10g Rel 2 Infrastructure (co-located Metadata Repository and Identity Management)

  * A OracleAS 10g Rel 2 J2EE and Webcache middle tier

All Oracle Homes were patched to Oracle Application Server

All hostname resolution on Primary and <STANDBY SHORT HOSTNAME> servers is performed via /etc/hosts. DNS is disabled on both servers.

Note: It is a prerequisite that in any DR setup, all Oracle homes be patched to before embarking on the Disaster Recovery commands. At the very least, if you choose not to install the full patchset, then ASGuard needs to be installed into all Oracle homes (download from OTN). If you choose to install ASGuard only, see <Note 429530.1> Unable To Login To Asg Using Asgctl.Sh As Ias_admin After Upgrading to

The configuration in this note should not be attempted for new Disaster Recovery Setups.


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In this Document
 A: Preparing the Primary and <STANDBY SHORT HOSTNAME> Servers for Installation
 B: Installing Oracle Application Server
 C: Configuring and Testing Disaster Recovery

C1: Discovering the Topology
 C2: Switchover Operations
 C3: Failover Operations

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