Oracle RAC backup and recovery OCR (10g)

Oracle RAC backup and recovery OCR
 
For how to add and delete Oracle rac ocr, see:

Voting disks Backup Recovery reference:

1. OCR supports two backup methods: automatic backup and manual backup.
 
Automatic Backup:
 
Oracle Clusterware automatically creates OCR backups every 4 hours. at any one time, Oracle Clusterware always retains the latest 3 backup copies of the OCR that are 4 hours old, 1 day old, and 1 week old.
 
---- An Oracle cluster is automatically backed up every 4 hours. At any time, the Oracle cluster will always save three backup files. They are backup files for the last 4 hours, the last 1 day, And the last 1 week.
 
You can view the automatic backup files in the following ways:
 
Ocrconfig-showbackup

Manual backup control file:
 
You can use the following method to export the OCR content to a file. backup_file_name is the name of the backup file.
 
Ocrconfig-export backup_file_name

Tip: You need to use the root user to execute this command
 

Example:
 
-- Backup
[Root @ node1 bin] #./ocrconfig-export/home/oracle/backup/ocrbackup1.bak
-- View the backup file
[Oracle @ node1 backup] $ ll
Total 104632
-Rw-r -- 1 root 86056 Mar 18 20:18 ocrbackup1.bak
 

2. OCR supports two methods: automatic backup and manual backup.
 
Restore from automatic backup:
 
Use the following method to restore OCR
 

Ocrconfig-restore file_name prompt: run as the root user. file_name indicates the backup file name from which the backup file you want to recover
 

1. Disable CRS on two nodes
 
[Root @ node1 bin] #./crsctl stop crs
Stopping resources.
Successfully stopped CRS resources
Stopping CSSD.
Shutting down CSS daemon.
Shutdown request successfully issued.

[Root @ node2 bin] #./crsctl stop crs
Stopping resources.
Successfully stopped CRS resources
Stopping CSSD.
Shutting down CSS daemon.
Shutdown request successfully issued.
2. Restore OCR

① Simulate the destruction of the raw device data of OCR. This example uses non-redundancy.
 

[Root @ node1 bin] # dd if =/dev/urandom of =/dev/raw/raw1
Dd: writing to '/dev/raw/raw1': No space left on device
208865 + 0 records in
208864 + 0 records out
106938368 bytes (107 MB) copied, 123.665 seconds, 865 kB/s
 

-- Crs cannot be started after destruction.

1 2 Next Page