ADD/REMOVE/REPLACE/MOVE Oracle Cluster Registry (OCR) and Voting Disk

Posted by Sagar Patil

Note: You must be logged in as the root user, because root owns the OCR files.  Make sure there is a recent copy of the OCR file before making any changes: ocrconfig ­showbackup

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Managing CRS/ Commands

Posted by Sagar Patil

CRS DAEMON FUNCTIONALITY

CRSD: Performs high availability recovery and management operations such as maintaining the OCR and managing application resources.
- Engine for HA operation
- Manages ‘application resources’
- Starts, stops, and fails ‘application resources’ over
- Spawns separate ‘actions’ to start/stop/check application resources
- Maintains configuration profiles in the OCR (Oracle Configuration Repository)
- Stores current known state in the OCR.
- Runs as root
- Is restarted automatically on failure

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Oracle Clusterware Administration Quick Reference

Posted by Sagar Patil

Sequence of events to bring cluster database back..

1.    Start all services using “start -nodeapps”
2.    Start ASM instnace using “srvctl start asm -n (node)”
3.    Start RAC instances using “srvctl start instance -d (database) -I (instance)”
4.    Finish up by bringing our load balanced/TAF service online “srvctl start service -d orcl -s RAC”

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CRSCTL : Oracle Clusterware Service Administration

Posted by Sagar Patil

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RAC : Managing OCR Backup and Recovering OCR

Posted by Sagar Patil

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Oracle Clusterware Log/Clusterware log files

Posted by Sagar Patil

In Oracle 10.2, Oracle Clusterware log files are created in the $ORA_CRS_HOME/log directory.

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