Hello Friend's,
In RAC, administer and set up Oracle Cluster Registry (OCR) for high availability. The often used command to manage Oracle Cluster Registry (OCR) will be examined in this article.
1) Verify OCR
2) Check OCR Backups
3) OLR Management
4) Oracle Clusterware Logs
1) Verify OCR
[root@dm01db01 gr_home]# ocrcheck
Status of Oracle Cluster Registry is as follows :
Version : 4
Total space (kbytes) : 901284
Used space (kbytes) : 84572
Available space (kbytes) : 816712
ID : 534246430
Device/File Name : +CRS1
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
2) Check OCR Backups
ocrconfig -showbackup auto - Every 4 hrs backup (3 max) ñ File Names: backup00.ocr, backup01.ocr and backup02.ocr - Daily backups (2max) ñ day.ocr and day_.ocr - Weekly backups (2 max) ñ week.ocr and week_.ocr
[root@dm01db01 gr_home]# ocrconfig -manualbackup --> manual backup of OCR
dm01db01 2025/01/11 19:36:05 +CRS1:/dm01db-cluster/OCRBACKUP/backup_20250111_193605.ocr.258.1190144165 3844574830
[root@dm01db01 gr_home]# ocrconfig -backuploc +DATA --> to change OCR backup location
ocrconfig -restore 3) OLR Management [root@dm01db01 gr_home]# ocrdump -local /tmp/olr.bkp --> To see the contents of OLR [root@dm01db01 gr_home]# ocrdump -local -xml /tmp/olr1.bkp --> To see the contents of OLR 4) Oracle Clusterware Logs Location : $GRID_HOME/log/ Alertlog for ASM Other process log files
[root@dm01db01 gr_home]# cat /etc/oracle/olr.loc --> Default OLR location
olrconfig_loc=/grid/app/grid19c/gr_base/crsdata/dm01db01/olr/dm01db01_19.olr
crs_home=/grid/app/grid19c/gr_home
[root@dm01db01 gr_home]# ocrcheck -local --> Check OLR configuration file location using ocrcheck
Status of Oracle Local Registry is as follows :
Version : 4
Total space (kbytes) : 491684
Used space (kbytes) : 83204
Available space (kbytes) : 408480
ID : 1745063553
Device/File Name : /grid/app/grid19c/gr_base/crsdata/dm01db01/olr/dm01db01_19.olr
Device/File integrity check succeeded
Local registry integrity check succeeded
Logical corruption check succeeded
[root@dm01db01 gr_home]# ocrconfig -local -manualbackup --> To take manual backup of OLR
dm01db01 2025/01/11 19:50:33 /grid/app/grid19c/gr_base/crsdata/dm01db01/olr/backup_20250111_195033.olr 3844574830
dm01db01 2025/01/08 21:39:03 /grid/app/grid19c/gr_base/crsdata/dm01db01/olr/backup_20250108_213903.olr 3844574830
[root@dm01db01 dm01db01]# pwd
/grid/app/grid19c/gr_home/log/dm01db01
[root@dm01db01 dm01db01]# ls -l
total 8
drwxr-xr-x. 6 grid oinstall 81 Jan 8 21:33 acfs
drwxr-x---. 2 grid oinstall 6 Jan 8 21:33 admin
drwxr-xr-x. 2 grid oinstall 6 Jan 8 21:33 afd
drwxr-x---. 2 grid oinstall 6 Jan 8 21:33 chad
drwxrwxrwt. 2 grid oinstall 4096 Jan 11 19:37 client
drwxr-x---. 2 root oinstall 6 Jan 8 21:33 crsd
drwxr-x---. 2 grid oinstall 6 Jan 8 21:33 cssd
drwxr-x---. 2 root oinstall 6 Jan 8 21:33 ctssd
drwxr-x---. 2 grid oinstall 6 Jan 8 21:33 diskmon
drwxr-x---. 2 grid oinstall 6 Jan 8 21:33 evmd
drwxr-x---. 2 grid oinstall 6 Jan 8 21:33 gipcd
drwxr-x---. 2 grid oinstall 6 Jan 8 21:33 gnsd
drwxr-x---. 2 grid oinstall 6 Jan 8 21:33 gpnpd
drwxr-x---. 2 grid oinstall 6 Jan 8 21:33 mdnsd
drwxr-x---. 2 root oinstall 6 Jan 8 21:34 ohasd
drwxrwxr-t. 5 grid oinstall 53 Jan 8 21:33 racg
drwxr-x---. 2 grid oinstall 6 Jan 8 21:33 srvm
drwxrwxr-x. 2 grid oinstall 6 Jan 8 21:33 xag
[grid@dm01db01 ~]$ cd /grid/app/grid19c/gr_base/diag/asm/+asm/+ASM1/trace
[grid@dm01db01 trace]$ ls -ltr alert_+ASM1.log
-rw-r-----. 1 grid oinstall 150296 Jan 11 19:31 alert_+ASM1.log
/grid/app/grid19c/gr_home/log/dm01db01/crsd --> crs log
/grid/app/grid19c/gr_home/log/dm01db01/ctssd --> cts log
/grid/app/grid19c/gr_home/log/dm01db01/evmd --> evmd log
/grid/app/grid19c/gr_home/log/dm01db01/ohasd --> ohasd log
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