Repair an OCR location if Oracle Database displays an OCR failure alert in Oracle Enterprise Manager or in the Oracle Clusterware alert log file, as described in the "Repairing an Oracle Cluster Registry Configuration on a Local Node" section. When you repair OCR on a stopped node using ocrconfig -repair, you must provide the same OCR file name (which should be case-sensitive) as the OCR file names on other nodes. Required fields are marked *. CSS service is sending heartbeat messages through the network and voting disk.In a situation, when due to private network failure, nodes are not able to synchronize I/O to the shared disks, Therefore some of the nodes will be going to the offline stage. WebOracle recommends just two diskgroups by default: A DATA diskgroup to hold all data, index, undo and temp files. 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. WebOCR and Voting Disk. Important Operation for Voting disks in RACa) To list currently configured voting diskif(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'techgoeasy_com-large-mobile-banner-1','ezslot_15',198,'0','0'])};__ez_fad_position('div-gpt-ad-techgoeasy_com-large-mobile-banner-1-0'); Run the following command as the root user to remove a voting disk: Run the following command to back up a voting disk. In addition to maintaining its own disk block, CSSD processes also monitor the disk block maintained by the CSSD processes of other nodes in the cluster. user13389425 Sep 7 2010 edited Sep 7 2010. 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. OCR also helps maintain the structure and dependencies that exist in the startup of various resources in the cluster. If you choose to store your voting disks in Oracle ASM, then Oracle ASM stores all the voting disks for the cluster in the disk group you choose. In 10g, Oracle Clusterware can support 32 voting disks but in 11g R 2 supports 15 voting disks. The CRSD process that creates the backups also creates and retains an OCR backup for each full day and at the end of each week. Oracle Grid Infrastructure Installation Guide for information about creating OCRs, Oracle Automatic Storage Management Administrator's Guide for more information about Oracle ASM disk group management. Added on Sep 7 There is an API provided for this function (ocrconfig and crsctl), which is the appropriate interface This command updates the OCR configuration on all of the nodes on which Oracle Clusterware is running. Because the default backup is on a local file system, Oracle recommends that you include the backup file created with the OCRCONFIG utility as part of your operating system backup using standard operating system or third-party tools. Break-in heartbeat indicates a possible error scenario. If you have only one OCR location configured and online, then you must first add a new location and then delete the failed location, as follows: It may be necessary to repair OCR if your cluster configuration changes while that node is stopped and this node is the only member in the cluster. Hi, How the voting disk differ from the OCR. Mount and check status Diskgroup in all Nodes --With Spmove command we will move the spfile Without the voting disk, its difficult to know, whether nodes are facing network problems or nodes are no longer available. Under no circumstances will the failure of one Oracle ASM instance on one node affect the whole cluster. Our storage is EMC SAN. --Connect with Grid User Repairing an OCR involves either adding, deleting, or replacing an OCR location. What are Consumer Forums and what is their importance? Successful deletion of voting disk 8b62c257e7fa2bfabf363cb4791c1f4c. However, if you upgrade from a previous Oracle Clusterware release, then you can continue to use raw or block devices. 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). Oracle Cluster Registry (OCR) which records cluster configuration information. If voting disks are stored on Oracle ASM with normal or high redundancy, and the storage hardware in one failure group suffers a failure, then if there is another disk available in a disk group in an unaffected failure group, Oracle ASM recovers the voting disk in the unaffected failure group. Ensure there is at least 280 MB of space on the mount partition. To change an Oracle Cluster Registry location: Use the OCRCHECK utility to verify that a copy of OCR other than the one you are going to replace is online, using the following command: OCRCHECK displays all OCR locations that are registered and whether they are available (online). document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. Oracle Cluster Registry Depending on where you store your voting files, do one of the following: If the voting disks are stored in Oracle ASM, then run the following command to migrate the voting disks to the Oracle ASM disk group you specify: The Oracle ASM disk group to which you migrate the voting files must exist in Oracle ASM. Few possible scenarios:1. If OCR is not available or it is corrupt, then you must restore OCR as described in "Restoring Oracle Cluster Registry". Oracle ASM manages voting disks differently from other files that it stores. Typically, one would simply cp or dd the files once the new storage has been presented to the hosts. You can store OCR and voting disks on Oracle Automatic Storage Management (Oracle ASM), or a certified cluster file system. You can just replace with new voting file on disk group DATA. OCR stores Oracle Clusterware and Oracle RAC database configuration information To add one or more voting disks, run the following command, replacing the path_to_voting_disk variable with one or more space-delimited, complete paths to the voting disks you want to add: To replace voting disk A with voting disk B, you must add voting disk B, and then delete voting disk A. Optical Mark Reader (OMR) is the technology of electronically extracting data from marked fields such as checkboxes or bubbles from pre-printed forms. Check the SPFILE location. In such cases, Oracle Database displays an alert message in either Oracle Enterprise Manager, the Oracle Clusterware alert log files, or both. Start the Oracle Clusterware stack on one node in exclusive mode by running the following command as root: The -nocrs option ensures that the crsd process and OCR do not start with the rest of the Oracle Clusterware stack. At least two OCR locations if OCR is configured on an Oracle ASM disk group. 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. Use the following procedure to restore OCR in an Oracle Restart environment: Stop Oracle High Availability Services by running the following command on all of the nodes: Run the ocrcheck -config command to determine the OCR location and then create an empty (0 byte) OCR location with appropriate permissions in that location. 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. Oracle recommends that you do not use more than five voting files, Following are the steps to move OCR, Voting Disk and Spfile to new disk group. If the OCR mirror and OCR have been deleted, then it may be faster to restore the OCR using the OCR backups. Hi all, What is the difference b/w OCR and Voting Disk. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[336,280],'techgoeasy_com-box-4','ezslot_3',192,'0','0'])};__ez_fad_position('div-gpt-ad-techgoeasy_com-box-4-0');1)If it is stored in ASM, no need to configure manually as the files will be created depending on the redundancy in ASM. A small number of failure groups, or failure groups of uneven capacity, can create allocation problems that prevent full use of all of the available storage. WebOracle Clusterware includes two important components that manage configuration and node membership: Oracle Cluster Registry (OCR), which also includes the local component Oracle Local Registry (OLR), and voting files. Look at output from the ocrdump command and determine whether it has your latest updates. Oracle Cluster Registry (OCR) which records cluster configuration information. Stop Oracle Clusterware on the node where it is running in exclusive mode: Run the ocrconfig -repair -replace command as root on all the nodes in the cluster where you did not the ocrconfig -restore command. Check the Voting Disk Location You can run this command more than once if there is more than one OCR location configured. However, if you are unable to start any cluster node in your environment and if you can neither repair OCR nor restore access to all OCR locations, then you can override the protection mechanism. Jump to Answer. [root@NODE01 ~]# /u01/app/11.2.0.4/grid/bin/crsctl query css votedisk, 3. As the root user, run the following command to add an OCR location to either Oracle ASM or other storage device: To remove an OCR location or a failed OCR location, at least one other OCR must be online. CREATE DISKGROUP OCR_NEWDG NORMAL REDUNDANCY WebOCR 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 If you did not store voting disks in Oracle ASM, then run the following command using the File Universal Identifier (FUID) obtained in the previous step: Stop the Oracle Clusterware stack as root: Restart the Oracle Clusterware stack in normal mode as root: You can add, remove, and migrate voting disks after you install Oracle Clusterware. It records the data where marks are made on the form. This post has been answered by user00726 on Sep 7 2010. Then each node uses its local copy of OCR and the local CRSd process to access it and communicate via the same local process if they need more updates from the physical OCR file. Basic information about the resources, their location, permissions, current value, type, state, etc. For eg, if you have 5 voting disks, a node must be able to access at least 3 of the voting disks. You must run the command as a user with administrative privileges. If you run the ocrconfig -add | -repair | -replace command, then the device, file, or Oracle ASM disk group that you are adding must be accessible. This section describes how to administer OCR in the following topics: Migrating Oracle Cluster Registry to Oracle Automatic Storage Management, Adding, Replacing, Repairing, and Removing Oracle Cluster Registry Locations, Diagnosing Oracle Cluster Registry Problems, Administering Oracle Cluster Registry with Oracle Cluster Registry Export and Import Commands, Upgrading and Downgrading the Oracle Cluster Registry Configuration. 4) If the disk is not updated in a short timeout period, the node is considered unhealthy and maybe rebooted to protect the database. The Oracle Clusterware installation process creates the voting disk and the OCR on shared storage. Restore OCR with an OCR backup that you can identify in "Listing Backup Files" by running the following command as root: If you configured OCR in an Oracle ASM disk group, then ensure that the Oracle ASM disk group exists and is mounted. If you move voting disks from one Oracle ASM disk group to another, then you can change the number of voting disks by placing them in a disk group of a different redundancy level as the former disk group. When using a mix of storage pools with both high capacity spinning disks and high performance solid state devices additional diskgroups should be considered, which correspond to the different performance storage pools.

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