RAC集群OCR的维护(3)

2、 问题处理

Oracle Cluster Registry Troubleshooting describes common OCR problems with corresponding resolution suggestions.

Table A-2 Common OCR Problems and Solutions

3、 OCR overwrite

The OCR has a mechanism that prevents data loss due to accidental

overwrites. If you configure a mirrored OCR and if the OCR cannot access the two mirrored OCR locations and also cannot verify that the available OCR contains the most recent configuration, then the OCR prevents further modification to the available OCR. The OCR prevents overwriting by

prohibiting Oracle Clusterware from starting on the node on which the OCR resides. In such cases, Oracle displays an alert message in either Enterprise Manager, the Oracle Clusterware alert log files, or both.

running the ocrconfig -overwrite command can result in data loss if the OCR that you are using to perform the overwrite does not contain the latest configuration updates for your cluster environment.

4、 OCR Export and Import

ocrconfig -export file_name