Oracle Local Registry

• The Oracle Local Registry (OLR) is a registry similar to OCR and is located on each node in a cluster, but contains information specific to each node. 
• It contains manageability information about Oracle Clusterware, including dependencies between various services. 
• Oracle High Availability Services uses this information. 
• OLR is located on local storage on each node in a cluster. 
• Its default location is in the path Grid_home/cdata/host_name.olr, where Grid_home is the Oracle Grid Infrastructure home, and host_name is the host name of the node. 

To check the OLR, execute the ocrcheck -local command on the desired node.

$ ocrcheck –local

To view the contents of the OLR, execute the ocrdump -local command, redirecting the output to stdout:

$ ocrdump -local -stdout

# ocrcheck -local

Status of Oracle Local Registry is as follows :

   Version                  :          3

   Total space (kbytes)     :     262120

   Used space (kbytes)      :       2644

   Available space (kbytes) :     259476

   ID                       :  250248496

   Device/File Name         : /u01/app/11.2.0/grid/cdata/host01.olr

         Device/File integrity check succeeded

         Local registry integrity check succeeded

         Logical corruption check succeeded