The OCR holds the metadata and wallets for all the resounces under the CRSD statck and its agents. OCR still hol information about local resources, but it's not required to be accesible to join the cluster. It includes information about the state of resouces, how to stop/start resources. At least one OCR must exist, but you can have it up to five copies. In 11gR2, OCR can be stored in ASM. The OCR location can be found in /etc/oracle/ocr.loc
+ASM1 - oracle: ocrcheck
Status of Oracle Cluster Registry is as follows :
Version : 3
Total space (kbytes) : 262120
Used space (kbytes) : 3528
Available space (kbytes) : 258592
ID : 1710014838
Device/File Name : +OV
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 bypassed due to non-privileged user
From the output above, there are 5 slots, but one is used.
The OLR holds metadata for the local nodeand GPnP profile. It's managed by the OHASD and also manages the low-level processes required to allow a node to join a cluster. None of the OLR data is shared.
- root: ocrcheck -local
Status of Oracle Local Registry is as follows :
Version : 3
Total space (kbytes) : 262120
Used space (kbytes) : 2572
Available space (kbytes) : 259548
ID : 272464046
Device/File Name : /apps/grid/11.2.0/grid/cdata/dbplno155.olr
Device/File integrity check succeeded
Local registry integrity check succeeded
Logical corruption check succeeded
or you can view it in /etc/oracle/olr.loc
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