You cannot customize the backup frequencies or the number of files that Oracle Database retains. Only after you use the replace verb to move voting disks back to non-Oracle ASM storage are the verbs add css votedisk and delete css votedisk again usable. When any node is not able to send a heartbeat to the voting disk, then it will reboot itself.For high availability, Oracle recommends that you have a minimum of three voting disks. In addition to using the automatically created OCR backup files, you should also export OCR contents before and after making significant configuration changes, such as adding or deleting nodes from your environment, modifying Oracle Clusterware resources, and upgrading, downgrading or creating a database. List the Candidate Disk present for creating DISKGROUP. 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. Please sign in to comment While marking their own presence, all the nodes also register the information about their communicability with other nodes in the voting disk. The first method uses automatically generated OCR copies and the second method enables you to issue a backup command manually: Automatic backups: Oracle Clusterware automatically creates OCR backups every four hours. SQL> show parameter spfile, [grid@RAC1 ~]$ asmcmd spget For steps on this check the documentation: Oracle Database Oracle Clusterware and Oracle Real Application Clusters Administration and Deployment Guide. Move the OCR to new diskgroup. 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. Multiple processes on each node have simultaneous read and write access to the OLR particular to the node on which they reside, regardless of whether Oracle Clusterware is running or fully functional. Backups are created when the system is online. This post has been answered by user00726 on Sep 7 2010. Voting files which record node membership information. Change). To add an OCRMIRROR device when only OCR device is defined: 3. Oracle Local Registry is OCRs local counterpart. Restore Voting Disk Since we have restored OCR, we restored voting file as well. That is to say, as long as you have the latest OCR backup, you automatically have voting disk backup too. The Oracle Clusterware installation process creates the voting disk and the OCR on shared storage. Move the VotingDisk to new diskgroup. OMR technology scans a printed form and reads from predefined positions. Oracle Cluster Registry (OCR) and Oracle Local Registry (OLR) Oracle Cluster Registry (OCR) and Oracle Local Registry (OLR) are two very important components of a Grid Infrastructure that help manage the cluster resources. By default, OLR is located at Grid_home/cdata/host_name.olr on each node. The ocrconfig -replace command requires that at least two OCR locations are configured. You cannot inspect the contents of an export. Nytro.ai uses technology that works best in other browsers. OCR In such cases, Oracle Database displays an alert message in either Oracle Enterprise Manager, the Oracle Clusterware alert log files, or both. At least two OCR locations if OCR is configured on mirrored hardware or third-party mirrored volumes. You can just replace with new voting file on disk group DATA. Its primary purpose is to help in a situation where the private network communication fails.CSS (Cluster Synchronization Service) is the service that determines which nodes in the cluster are available via communication through a dedicated private network and with a voting disk used as a secondary communication mechanism. 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. Once you configure voting disks on Oracle ASM, you can only make changes to the voting disks' configuration using the crsctl replace votedisk command. If it is, stop it by running the following command as root: Import OCR by running the following command as root: If you are importing OCR to a cluster or network file system, then skip to step 7. Ensure that the OCR devices that you specify in the OCR configuration exist and that these OCR devices are valid. This article is intended for DBA and Support Engineers who need to modify, or move OCR and voting disks files, customers who have an existing clustered environment deployed on a storage array and might want to migrate to a new storage array with minimal downtime. If you cannot resolve the problem that caused the CLSD message, then run the command ocrconfig -overwrite to start the node. To downgrade, follow the downgrade instructions for each component and also downgrade OCR using the ocrconfig -downgrade command. Recover the Oracle voting disk when its It contains manageability information about Oracle Clusterware, including dependencies between various services. (LogOut/ 1. This section includes the following topics: Adding an Oracle Cluster Registry Location, Removing an Oracle Cluster Registry Location, Replacing an Oracle Cluster Registry Location, Repairing an Oracle Cluster Registry Configuration on a Local Node, Overriding the Oracle Cluster Registry Data Loss Protection Mechanism. 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. 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. When using ScaleIO snapshots, it can be beneficial to snapshot the DATA and FRA diskgroups independently. Oracle Universal Installer for Oracle Clusterware 11g release 2 (11.2), does not support the use of raw or block devices. OCR +OCRVD_DG/RAC-cluster/asmparameterfile/registry.183.284573136. Added on Sep 7 As a definitive verification that OCR failed, run ocrcheck and if the command returns a failure message, then both the primary OCR and the OCR mirror have failed. Break-in heartbeat indicates a possible error scenario.

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