Graceful Application Switchover in RAC with No Application Interruption
(Doc ID 1593712.1)
Last updated on MAY 19, 2022
Applies to:
Oracle Database Cloud Exadata Service - Version N/A and later Oracle Database Exadata Express Cloud Service - Version N/A and later Oracle Database Cloud Service - Version N/A and later Oracle Database Backup Service - Version N/A and later Oracle Database - Enterprise Edition - Version 12.1.0.1 and later Information in this document applies to any platform.
Purpose
This document discusses what is needed to manage a graceful application switchover between RAC nodes with no application interruptions during planned maintenance operations. A graceful application switchover means that sessions are drained from one instance to another without interruption.
NOTE: If the reason for the planned maintenance operation is to patch "Oracle JavaVM Component Database PSU/RU" (OJVM PSU/RU), please follow the steps in MOS Doc ID 2217053.1 instead of this note for Oracle versions up to and including 19.x
Scope
This document is intended for architects, database administrators, and application developers.
Details
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