Graceful Application Switchover in RAC with No Application Interruption
(Doc ID 1593712.1)
Last updated on AUGUST 04, 2018
Applies to:Oracle Database - Enterprise Edition - Version 22.214.171.124 and later
Information in this document applies to any platform.
This document discusses what is needed to manage a graceful application switchover between RAC nodes with no application interruption.
This document is intended for architects, database administrators, and application developers.
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In this Document
|Recommended Graceful Application Switchover Procedure|
|1. Check current status of the services and related instances to ensure services can be moved successfully|
|2. Stop services normally (not using FORCE option) on the node to be maintained|
|3. Disable the service so clusterware does not bring up the service until the proper time should an unplanned outage occur|
|4. Disconnect long-running sessions after the current transaction completes|
|5. Repeat Steps 2 - 4 for all services affected by the maintenance|
|6. Shutdown the database instance|
|7. Perform desired maintenance|
|8. Start up instance(s) on the node|
|9. Enable services that were previously disabled|
|10. Start services that were stopped|
|11. Observe that connections are appearing on the service again|
|12. Repeat this procedure for each node or instances that needs to be shutdown for maintenance|
|Understanding Your Application's Use of Connections|
|Services and Application Configuration Best Practices|