Dual Shock

11gR2 Migrating Oracle Cluster Registry from Oracle ASM to Other Types of Storage T he following are the steps to migrate OCR from Oracle ASM to OCFS2. According to "Clusterware Administration and Deployment Guide" (e10717.pdf) run /u01/app/11.2.0/grid/bin/ocrcheck to see the status of cluster registry. Then create a file (just touch it) under the preferred directory and set the right permissions. This is what I did as root user: touch /u02/ocfs2/ocr/OCRFile chown root.oinstall /u02/ocfs2/ocr/OCRFile chmod 640 /u02/ocfs2/ocr/OCRFile Then add your new OCR file to the final directory: /u01/app/11.2.0/grid/bin/ocrconfig -add /u02/ocfs2/ocr/OCRFile and check again the OCR status: /uo1/app/11.2.0./grid/bin/ocrcheck Now its time to remove OCR file from ASM. Nothing to do on second node. Thats all.

11gR2 removing a mirrored Oracle Cluster Registry and adding again I want to test a scenario where one of my OCR file is lost. This is what I have done. Now lets have a look at my OCR configuration. /u01/app/11.2.0/grid/bin/ocrcheck Status of Oracle Cluster Registry is as follows : Version : 3 Total space (kbytes) : 262120 Used space (kbytes) : 2708 Available space (kbytes) : 259412 ID : 2044210075 Device/File Name : /u02/ocfs2/ocr/OCRFile Device/File integrity check succeeded Device/File Name : /u02/ocfs2_mirror/ocr/OCRFile Device/File integrity check succeeded Device/File not configured Device/File not configured Device/File not configured Cluster registry integrity check succeeded Logical corruption check succeeded As you can see Ive two mirrored OCR files one on /u02/ocfs2/ path and another on /u02/ocfs2_mirror/. For your information, these paths are on two different LUNs formed by several disks and on a RAID-1 configuration Here is where my mirrored OCR file exists...