OCR：

oracle集群注册表（ocr)是oracle rac配置信息的资料库，用于管理集群节点列表和实例的信息
ocr位置是安装crs时指定的，位于== cat /etc/oracle/ocr.loc==

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[root@host03 ~]# cat /etc/oracle/ocr.loc
#Device/file  getting replaced by device +DGACFS/cluster01/OCRFILE/registry.255.1117900157 
ocrconfig_loc=+DGDATA/cluster01/OCRFILE/registry.255.1117898429
ocrmirrorconfig_loc=+DGFRA/cluster01/OCRFILE/registry.255.1117900147
ocrconfig_loc3=+DGACFS/cluster01/OCRFILE/registry.255.1117900157

检查OCR的完整性

[root@host03 ~]# ocrcheck
Status of Oracle Cluster Registry is as follows :
	 Version                  :          4
	 Total space (kbytes)     :     409568
	 Used space (kbytes)      :       2868
	 Available space (kbytes) :     406700
	 ID                       :  301143007
	 Device/File Name         :    +DGDATA
                                    Device/File integrity check succeeded
	 Device/File Name         :     +DGFRA
                                    Device/File integrity check succeeded
	 Device/File Name         :    +DGACFS
                                    Device/File integrity check succeeded

                                    Device/File not configured

                                    Device/File not configured

	 Cluster registry integrity check succeeded

	 Logical corruption check succeeded

[root@host03 ocrbackup]# ocrconfig -delete +DGACFS
[root@host03 ocrbackup]# ocrcheck 
Status of Oracle Cluster Registry is as follows :
	 Version                  :          4
	 Total space (kbytes)     :     409568
	 Used space (kbytes)      :       2900
	 Available space (kbytes) :     406668
	 ID                       :  301143007
	 Device/File Name         :    +DGDATA
                                    Device/File integrity check succeeded
	 Device/File Name         :     +DGFRA
                                    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

olr:本地注册表

位于：grid_home/host_name.olr
检查本地节点olr状态

[root@host03 ~]# ocrcheck -local
Status of Oracle Local Registry is as follows :
	 Version                  :          4
	 Total space (kbytes)     :     409568
	 Used space (kbytes)      :        816
	 Available space (kbytes) :     408752
	 ID                       : 1286866930
	 Device/File Name         : /u01/app/12.1.0/grid/cdata/host03.olr
                                    Device/File integrity check succeeded

	 Local registry integrity check succeeded

	 Logical corruption check succeeded

还原olr顺序

1  crsctl stop crs
2  [root@host03 ~]# ocrconfig  -showbackup
PROT-24: Auto backups for the Oracle Cluster Registry are not available
host04     2022/12/03 20:25:41     /home/oracle/ocrbackup/backup_20221203_202541.ocr     0   
3  ocrconfig -local -restore4  [root@host03 ~]# ocrcheck -local
5  crsctl start crs
6  cluvfy comp clr

还原ocr

crsctl stop crs
crsctl start crs -excl
ocrconfig -local -restore

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