By default, redo logs and control files are mirrored to both the DATA and FRA diskgroups. Use the following command syntax as root on the restarted node where you use either a destination_file or +ASM_disk_group to indicate the current and target OCR locations: This operation only changes OCR on the node on which you run this command. Oracle Universal Installer for Oracle Clusterware 11g release 2 (11.2), does not support the use of raw or block devices. OCR is more commonly used than Voting Disk. cluster. Optical Character Reader (OCR) is used to convert different types of documents such as scanned paper documents, PDF files or images captured by a digital camera into machine-encoded text. Ensure that the most recent OCR contains the latest OCR updates. Oracle Automatic Storage Management Administrator's Guide for more information about disk group redundancy and quorum failure groups, "Adding, Deleting, or Migrating Voting Disks" for information about migrating voting disks. These files can be stored either in ASM or in shared storage. Look at output from the ocrdump command and determine whether it has your latest updates. OCR also helps maintain the structure and dependencies that exist in the startup of various resources in the cluster. Once you configure voting disks on Oracle ASM, you can only make changes to the voting disks' configuration using the crsctl replace votedisk command. In addition to mirroring OCR locations, you can also: Replace an OCR location if there is a misconfiguration or other type of OCR error, as described in the "Replacing an Oracle Cluster Registry Location" section. Mount and check status Diskgroup in all Nodes Voting files For example, if you have configuration problems that you cannot resolve, or if you are unable to restart Oracle Clusterware after such changes, then restore your configuration using the procedure for your platform. difference between OCR and voting disk If the OCR mirror and OCR have been deleted, then it may be faster to restore the OCR using the OCR backups. You can manually mirror OCR, as described in the "Adding an Oracle Cluster Registry Location" section, if you: Upgraded to Oracle Clusterware 11g release 2 (11.2) but did not choose to mirror OCR during the upgrade, Created only one OCR location during the Oracle Clusterware installation. Ensure that the file you created is visible from all nodes in the cluster. Just one node is unhealthy. If you scroll through the key names below you will observe that most of the information pertains to the local resources required by OHASd (refer to the flow chart in the earlier post to see which values this file would hold). What is voting disks in RAC 11gR2 can have upto five mirrored copies of OCR. However, Oracle recommends using several failure groups. Like, on my test box, ocrdump shows 676(11.2.0.4)keys in the OCR (could be different on your system). to Restore OCR and Voting Disk ERROR: Unable to verify the graphical display setup. If all of the voting disks are corrupted, then you can restore them, as follows: Restore OCR as described in "Restoring Oracle Cluster Registry", if necessary. If it is, stop it by running the following command as a member of the Administrators group: Import OCR by running the following command as a member of the Administrators group: In Oracle Clusterware 11g release 2 (11.2), each node in a cluster has a local registry for node-specific resources, called an Oracle Local Registry (OLR), that is installed and configured when Oracle Clusterware installs OCR. It is the rapid method of data entry. 4. OCR and Voting Disk Please sign in to comment # /u01/app/11.2.0.4/grid/bin/ocrdump OCRDUMPFILE.root, # /u01/app/11.2.0.4/grid/bin/ocrdump -xml OCRDUMPFILE.root.xml, # /u01/app/11.2.0.4/grid/bin/ocrdump -xml -local OLRDUMPFILE.root.xml, # grep '' OLRDUMPFILE.root.xml|wc -l, # ls -trl /u01/app/11.2.0.4/grid/cdata/ol6-dr-114-rac1.olr, Oracle Cluster Registry (OCR) and Oracle Local Registry (OLR), 12c: Backup NOARCHIVELOG database using RMAN, Howto: Apply July PSU 12c Grid and DB to an Oracle 12c 2 Node RAC cluster, Howto: Apply 12c Grid and DB PSU to Oracle 12c 2 node RAC, AIX RM PARAMETER LIST IS TOO LONG 0403 027 KSH, RMAN TSM TDPO TIVOLI BACKUP RECOVERY ORACLE, SQL OPTIMIZATION INDEX LIKE OPERATOR EXPLAIN PLAN, ASM diskgroups, volumes, filesystems, and instances, Its own backups (/etc/oracle/ocr.loc and local backups in $ORA_CRS_HOME/cdata/). It will also provide steps to move OCR / voting and ASM devices from raw device to block device. CREATE DISKGROUP OCR_NEWDG NORMAL REDUNDANCY Failure groups define disks that share components, such that if one fails then other disks sharing the component might also fail. The Oracle Clusterware has the OCR and voting disks open and is actively using them. Ocr WebThe voting disk is a file that manages information about node membership, and the OCR is a file that manages cluster and Oracle RAC database configuration information. When using ScaleIO snapshots, it can be beneficial to snapshot the DATA and FRA diskgroups independently. Voting files. The game features a fantasy space odyssey story with turn-based combat, and you can play it without spending a single cent on gacha. To migrate voting disks from Oracle ASM to an alternative storage device, specify the path to the non-Oracle ASM storage device with which you want to replace the Oracle ASM disk group using the following command: You can run this command on any node in the cluster. Nodes with quorum will maintain active membership of the cluster and other nodes (s) will be fenced/rebooted. Helpful tips . Important points about Voting disks in Oracle RAC. There is an API provided for this function (ocrconfig and crsctl), which is the appropriate interface SQL> show parameter spfile, [grid@RAC1 ~]$ asmcmd spget External redundancy: A disk group with external redundancy can store only one voting disk, Normal redundancy: A disk group with normal redundancy stores three voting disks, High redundancy: A disk group with high redundancy stores five voting disks. Perform the following procedure as the root user to remove an OCR location from your Oracle Clusterware environment: Ensure that at least one OCR location other than the OCR location that you are removing is online. Difference between Check the SPFILE location. However, if you upgrade from a previous version of Oracle Clusterware, you can migrate OCR to reside on Oracle ASM, and take advantage of the improvements in managing Oracle Clusterware storage. These backups are stored for a week and written in a round-robin fashion. It is used to process data from printed forms. OCR manages Oracle Clusterware and Oracle RAC database configuration information, OLR resides on every node in the cluster and manages Oracle Clusterware configuration information for each particular node, Voting disks manage information about node membership. Your biggest Honkai: Star Rail questions, answered Optical Mark Reader (OMR) is the technology of electronically extracting data from marked fields such as checkboxes or bubbles from pre-printed forms. such as Oracle RAC databases, listeners, virtual IP addresses (VIPs), and services and any applications. To add OCR to an Oracle ASM disk group, ensure that the Oracle Clusterware stack is running and run the following command as root: You can run this command more than once if you add multiple OCR locations. The voting disk data is automatically backed up in OCR as part of any configuration change and is automatically restored to any voting disk added. If OCR is not available or it is corrupt, then you must restore OCR as described in "Restoring Oracle Cluster Registry". I am installing two node Oracle 11gR1 RAC on Solaris. As shown in the image, there is a co-relation between Voting Disk, OCR and ASM Diskgroup such that during startup, CSS process reads the voting file and signals the CRSD to start. In addition, with numerous nodes, there are other possible scenarios too. It was first used in 1914 to help blind people in reading. Oracle Cluster Registry (OCR) which records cluster configuration information. The Windows default location for generating backups uses the same path structure. What are Consumer Forums and what is their importance? Use the following procedure to restore OCR on Linux or UNIX systems: List the nodes in your cluster by running the following command on one node: Stop Oracle Clusterware by running the following command as root on all of the nodes: If the preceding command returns any error due to OCR corruption, stop Oracle Clusterware by running the following command as root on all of the nodes: If you are restoring OCR to a cluster file system or network file system, then run the following command as root to restore OCR with an OCR backup that you can identify in "Listing Backup Files": After you complete this step, proceed to step 10. The voting disk is a file that manages information about node membership, and the OCR is a file that manages the cluster and Real Application Clusters (RAC) database configuration information. If this problem is local to only one node, you can use other nodes to start your cluster database. Comments. CSSD is a mutithreaded process.So it use various thread to monitor the heart beat. If a resource fails, then before attempting to restore OCR, restart the resource. The main difference between OCR and Voting Disk is that OCR is used to convert scanned images of text into digital text, while Voting Disk is used to store the ballot information for an election. Perform the following procedure to overwrite OCR if a node cannot start and if the alert log contains CLSD-1009 and CLSD-1011 messages. [grid@NODE01 ~]$ asmcmd spmove '+OCRVD_DG/RAC-cluster/asmparameterfile/registry.183.284573136' '+OCR_NEWDG/RAC-cluster/spfileASM.ora', --Verify For example: Using the ocrconfig -export command also enables you to restore OCR using the -import option if your configuration changes cause errors. Note: After verfied on all nodes then move to OCR Disks. If the configurations do not match, run ocrconfig -repair. In such cases, Oracle Database displays an alert message in either Oracle Enterprise Manager, the Oracle Clusterware alert log files, or both. Backups are created when the system is online. Check whether crsd is running. If the original OCR location does not exist, then you must create an empty (0 byte) OCR location with appropriate permissions before you run the ocrconfig -add or ocrconfig -replace commands. This step is necessary only if OCR is also corrupted or otherwise unavailable, such as if OCR is on Oracle ASM and the disk group is no longer available. To downgrade, follow the downgrade instructions for each component and also downgrade OCR using the ocrconfig -downgrade command. For eg, if you have 5 voting disks, a node must be able to access at least 3 of the voting disks. CRS-4266: Voting file(s) successfully replaced, 9. 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