Management and Maintenance of OracleCRS

Welcome to the Oracle community forum and interact with 2 million technical staff. 4. Managing VotingdiskVotingdisk is mainly used to record node member information, for example, the node members and Node Deletion records. (1) To view Votingdisk information, run the following command: crsctl

Welcome to the Oracle community forum and interact with 2 million technical staff> go to 4. Manage Voting disk (Voting disk), which is mainly used to record node member information, for example, the node members and Node Deletion records. (1) To view Voting disk information, run the following command: crsctl

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4. Manage Voting disk
Voting disk is mainly used to record node member information, such as node members and Node Deletion records.
(1) view Voting disk
To view the Voting disk information, run the following command:
Crsctl query css votedisk
For example:

 
 

  
  
[oracle@node-rac1 ~]$ crsctl query css votedisk 
  
  
 0. 0 /dev/raw/raw3 
  
  
 1. 0 /dev/raw/raw4 
  
  
 2. 0 /dev/raw/raw5 
  
  
Located 3 voting disk(s). 
 
 

(2) Back up Voting disk
Voting disk information is very important. You need to regularly back up votedisk, for example:
[Oracle @ node-rac1 ~] $ Dd if =/dev/raw/raw3 of =/tmp/votedisk. bak
In this way, the data is backed up to the/tmp directory.
(3) restore Voting disk
For example:
[Oracle @ node-rac1 ~] $ Dd if =/tmp/votedisk. bak of =/dev/raw/raw3

(4) Delete the voting disk image disk
To delete a voting disk, run the following command:
Crsctl delete css votedisk/dev/raw/raw5-force
This operation requires the root user identity, for example:

 
 

  
  
[root@node-rac1 ~]#/app/oracrs/product/11.0.6/crs/bin/crsctl \ 
  
  
>delete css votedisk /dev/raw/raw5 
  
  
Successful deletion of voting disk /dev/raw/raw5. 
  
  
[oracle@node-rac1 ~]$ crsctl query css votedisk 
  
  
 0. 0 /dev/raw/raw3 
  
  
 1. 0 /dev/raw/raw4 
 
 

(5) Add a voting disk image disk
When adding a voting disk, run the following command:
Crsctl add css votedisk/dev/raw/raw5-force
This operation requires the root user identity, for example:

 
 

  
  
[root@node-rac1 ~]#/app/oracrs/product/11.0.6/crs/bin/crsctl add css votedisk /dev/raw/raw5 Now formatting voting disk: /dev/raw/raw5. 
  
  
Successful addition of voting disk /dev/raw/raw5. 
  
  
[oracle@node-rac1 ~]$ crsctl query css votedisk 
  
  
crsctl query css votedisk 
  
  
 0. 0 /dev/raw/raw3 
  
  
 1. 0 /dev/raw/raw4 
  
  
 2. 0 /dev/raw/raw5 
 
 

5. Manage OCR

OCR disks are mainly used to record the configuration information of node members, such as database, service, instance, vip address, listener, application process, and other CRS resource configuration information, OCR can be stored on bare devices or cluster file systems.
(1) Check ocr settings
You can run the following command to view the current OCR settings:

 
 

  
  
[oracle@node-rac1 ~]$ ocrcheck 
  
  
Status of Oracle Cluster Registry is as follows : 
  
  
 Version: 2 
  
  
 Total space (kbytes): 4000280 
  
  
 Used space (kbytes): 3840 
  
  
 Available space (kbytes) : 3996440 
  
  
 ID: 1806962807 
  
  
 Device/File Name: /dev/raw/raw1 
  
  
 Device/File integrity check succeeded 
  
  
 Device/File Name: /dev/raw/raw2 
  
  
 Device/File integrity check succeeded 
  
  
 Cluster registry integrity check succeeded 
 
 

(2) OCR backup and recovery
By default, Oracle automatically backs up OCR once every four hours and saves three valid versions, but only saves them on one node of the cluster.
To view the path of the automatic backup OCR file, run the following command:

 
 

  
  
[oracle@node-rac1 ~]$ocrconfig -showbackup 
  
  
node-rac2 2011/03/11 13:10:27 /app/crs/product/11.0.6/crs/cdata/rac-cluster/backup00.ocr 
  
  
node-rac2 2011/03/11 09:10:25 /app/crs/product/11.0.6/crs/cdata/rac-cluster/backup01.ocr 
  
  
node-rac2 2011/03/11 05:10:24 /app/crs/product/11.0.6/crs/cdata/rac-cluster/backup02.ocr 
  
  
node-rac2 2011/03/10 21:10:20 /app/crs/product/11.0.6/crs/cdata/rac-cluster/day.ocr 
  
  
node-rac2 2011/03/10 21:10:20 /app/crs/product/11.0.6/crs/cdata/rac-cluster/week.ocr 
 
 

The method for restoring OCR is also very simple, for example:
[Oracle @ node-rac1 ~] $ Ocrconfig? Restore \
>/App/clustered RS/product/11.0.6/crs/cdata/rac-cluster/backup01.ocr
In fact, OCR can also be exported and imported manually. The method is as follows:
Manually export: ocrconfig-export/tmp/ocr_bak
Manual import: ocrconfig-import/tmp/ocr_bak

(3) add an OCR image Disk
To add an OCR disk to a disk, follow these steps:
The supervisor executes the crsctl stop crs command to stop the CRS service.
Mirror creates RAW devices for image OCR, such as/dev/raw/raw11
Then execute "ocrconfig? Export command to export OCR Information
Modify the/etc/oracle/ocr. loc file to add a new raw device, for example:

 
 

  
  
[oracle@node-rac1 ~]$more /etc/oracle/ocr.loc 
  
  
ocrconfig_loc=/dev/raw/raw1 
  
  
ocrmirrorconfig_loc=/dev/raw/raw2 
  
  
ocrmirrorconfig_loc=/dev/raw/raw11 
  
  
local_only=FALSE 
 
 

 Execute the command "ocrconfig-import" to import the OCR backup information to the disk.
 Check the ocr settings to see if the addition is successful.
Finally, use "crsctl start crs" to start the CRS service.

6. Quickly uninstall CRS

CRS installation is very simple, but if there is a problem with CRS, it is not easy to uninstall CRS when you need to reinstall it. The following describes how to uninstall the CRS program in Linux.
(1) disable the CRS Service
Before uninstalling the CRS, you must stop the CRS service, that is, execute:
/Etc/init. d/init. crs stop
If the crs service cannot be stopped, disable the CRS service, namely:
/Etc/init. d/init. crs disable
Then restart the system.
(2) execute the delete script
First, execute $ ORA_CRS_HOME/install/rootdelete. sh on all nodes in the cluster. Here the node node-rac1 is used as an example.

 
 

  
  
 [root@node-rac1 install]# /app/oracrs/product/11.0.6/crs/install/rootdeinstall.sh 
  
  
Verifying existence of ocr.loc file 
  
  
Removing contents from OCR mirror device 
  
  
2560+0 records in 
  
  
2560+0 records out 
  
  
10485760 bytes (10 MB) copied, 3.90308 seconds, 2.7 MB/s 
  
  
Removing contents from OCR device 
  
  
2560+0 records in 
  
  
2560+0 records out 
  
  
10485760 bytes (10 MB) copied, 3.84383 seconds, 2.7 MB/s 
 
 

Then, execute $ ORA_CRS_HOME/install/rootdeinstall. sh on any node in the machine (SET) group.

(3) uninstall crs using graphical interface OUI
Start the CRS installation welcome page under the CRS installation package directory, and click "Installed Products" on the welcome page. The following page is displayed: The Installed CRS information is displayed, click the Remove button in the lower-right corner to uninstall CRS.

(4) Delete other remaining files
The CRS uninstall program can delete most of the installation programs, but it cannot be fully uninstalled. Therefore, you need to manually delete ununinstalled files and run the following DELETE command on all nodes in the Cluster:

 
 

  
  
rm -rf /app/oracrs/product/11.0.6/crs/ 
  
  
/bin/rm -rf /var/tmp/.oracle 
  
  
/bin/rm -f /etc/oraInst.loc 
  
  
rm -rf /etc/oracle/ 
  
  
rm -f /etc/oratab 
 
 

After all the operations are completed, restart each node in the cluster and reinstall CRS.

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