Adding a new OCR device/file

To avoid Single Point Of Failure of OCR we should add/have multiple OCR device/file on separate storage. We can have upto 5 OCR device/file on our cluster configuration. Below are the steps outlined how we can add a new OCR to our Cluster configuration.


Step 1 - Let's first find how many OCR device/file already exists.


[root@rac1 ~]# ocrcheck
Status of Oracle Cluster Registry is as follows :
         Version                  :          3
         Total space (kbytes)     :     262120
         Used space (kbytes)      :       2616
         Available space (kbytes) :     259504
         ID                       :  170058601
         Device/File Name         : +VOTE_DATA
                                    Device/File integrity check succeeded

                                    Device/File not configured

                                    Device/File not configured

                                    Device/File not configured

                                    Device/File not configured

         Cluster registry integrity check succeeded

         Logical corruption check succeeded




Note :- In the preceding output we can see only one OCR file exists at location +VOTE_DATA diskgroup.





Step 2 - Add a new OCR device/file.


[root@rac1 ~]# ocrconfig -add '+VOTE_DATA'
PROT-29: The Oracle Cluster Registry location is already configured

Note :- We can't add another OCR device/file on the same file-system or diskgroup hence we need to add the new OCR file to a new/separate device/file as adding the other OCR files on the same device or diskgroup doesn't avoid SPOF(Single Poing Of Failure)



[root@rac1 ~]# ocrconfig -add '+FLASH'


Again verify if new OCR device/file is added to +FLASH diskgroup.

[root@rac1 ~]# ocrcheck
Status of Oracle Cluster Registry is as follows :
         Version                  :          3
         Total space (kbytes)     :     262120
         Used space (kbytes)      :       2616
         Available space (kbytes) :     259504
         ID                       :  170058601
         Device/File Name         : +VOTE_DATA
                                    Device/File integrity check succeeded
         Device/File Name         :     +FLASH
                                    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



[root@rac1 ~]# ocrcheck -config
Oracle Cluster Registry configuration is :
         Device/File Name         : +VOTE_DATA
         Device/File Name         :     +FLASH



Note : As we can see above, a new OCR device/file file has been added to +FLASH diskgroup. After adding the new OCR file once check the integrity of OCR using ocrcheck command.