Rac questions - SlideShare It only takes a minute to sign up. OCRCONFIG. Oracle Cluster Registry to Oracle Automatic Storage Management, Adding_ In other words, running the ocrconfig -overwrite command can result in data loss if the OCR location that you are using to perform the overwrite does not contain the latest configuration updates for your cluster environment. Oracle Universal Installer for Oracle Clusterware 11g release 2 (11.2), does not support the use of raw or block devices. stopping the cluster stack) Start up the cluster stack in exclusive mode on a node that holds the latest. The ocrconfig -export and ocrconfig -import commands are compatible. Run the following command to change the location where OCR creates backups: The file_name variable in the preceding command can be a full directory path name that is accessible by all nodes, or it can be an Oracle ASM disk group that is mounted on all nodes. Asking for help, clarification, or responding to other answers. You can run this command more than once if you add multiple OCR However, the ocrconfig command cannot modify OCR configuration information for nodes that are shut down or for nodes on which Oracle Clusterware is not running. You cannot customize the backup frequencies or the number of files that Oracle Database retains. voting disk Vs OCR user3266490 Aug 17 2009 — edited Aug 17 2009 Hi, How the voting disk differ from the OCR. You can migrate OCR to reside on Oracle ASM, and take advantage of the Use this procedure to import OCR on Windows systems. command to verify the current running version: Use the Oracle ASM Configuration Assistant (ASMCA) to configure and start 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. OMR technology scans a printed form and reads from predefined positions. Mirroring can help prevent OCR from becoming a single point of failure. 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. Oracle recommends that you configure multiple voting disks during Oracle Clusterware installation to improve availability. OCR and Voting Disks in RAC Complete Understanding - YouTube them. Use this procedure to restore OCR on Windows systems. The OCR location that you are replacing can be either online or offline. Are there any food safety concerns related to food produced in countries with an ongoing war in it? How many copies of OCR and voting disk Max we can have? To replace all voting disks not stored in Oracle ASM with voting disks managed by Oracle ASM in an Oracle ASM disk group, run the following command: Modifying voting disks that are not stored on Oracle ASM: To display the voting disk FUID and file path of each current voting disk, run the following command: This command returns a disk sequence number, the status of the disk, the FUID, and the path of the disk and no name of an Oracle ASM disk group. However, overriding the protection mechanism can result in the loss of data that was not available when the previous known good state was created. This list may be empty if all voting files were corrupted, or the list may have Oracle recommends that you use either automatic or manual backups, and the ocrconfig -restore command instead of the ocrconfig -export and ocrconfig -import commands to restore OCR for the following reasons: A backup is a consistent snapshot of OCR, whereas an export is not. Use the following command to verify that Oracle Clusterware is running on the node on which the you are going to perform the replace operation: Run the following command as root to replace the current OCR location using either destination_file or +ASM_disk_group to indicate the current and target OCR locations: The preceding command fails if you have less than two configured OCR locations that are online. To remove a voting disk, run the following command, specifying one or more space-delimited, voting disk FUIDs or comma-delimited directory paths to the voting disks you want to remove: After you start CSS in exclusive mode, you can replace the voting disk, as follows: To migrate voting disks to Oracle ASM, specify the Oracle ASM disk group name in the following command: After modifying the voting disk, verify the voting disk location, as follows: Scripting on this page enhances content navigation, but does not change the content in any way. The procedure described in the following list enables you to start the cluster using the available OCR location. Difference between OMR and OCR - GeeksforGeeks Oracle High Availability If all voting files are corrupted, however, you can restore them as described in "Restoring Voting Files". You must run the command as a user with administrative privileges. Do not restore OCR as a correction to revert to previous configurations, if some of these configuration changes should fail. Importing Oracle Cluster Registry Content on Linux or UNIX Systems, Importing Oracle Cluster Registry Content on Windows Systems. OCR and Voting disk file: ./ocrconfig -showbackup. Clusterware by running the following command as If the CRSD process running on the node affected by You cannot add a voting file to a cluster file system if the voting files are stored in an Oracle ASM disk group. Run the following command on any node in the cluster to remove an OCR location from either Oracle ASM or other location: Use the OCRCHECK utility to verify that a copy of OCR other than the one you are going to replace is. Despite the fact that crsctl query css votedisk reports zero vote disks in use, Oracle Clusterware remembers the fact that Oracle ASM was in use and the replace verb is required. Start Oracle High Availability Services by running the following command on all of the nodes: Stop Oracle Clusterware by running the following command as, Import OCR by running the following command as. If you configured OCR in an Oracle Run the following command as root user: ./crsctl start crs -excl. Quorum failure groups are used for storing As a definitive verification that OCR failed, run ocrcheck. If a resource fails, then before attempting to restore OCR, restart the resource. Oracle Clusterware 12c does not support the use of raw or block devices. It records the data where marks are made on the form. Restore OCR with an OCR backup that you can identify in. To add a new disk and remove the existing disk, run the following command, replacing the path_to_voting_diskB variable with the fully qualified path name of voting file B: The -purge option deletes existing voting files. 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. The 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. Its default location is in the path Because Oracle ASM does not mirror data in an external redundancy disk group, Oracle recommends that you use external redundancy with storage devices such as RAID, or other similar devices that provide their own data protection mechanisms. The file_name variable can be a device name or a file name. An example of what you might define as a failure group would be a set of SCSI disks sharing the same SCSI controller. If all of the voting files are corrupted, then you can use this procedure to restore must create an empty (0 byte) OCR location with the same Backups are created when the system is online. The ocrconfig -manualbackup and ocrconfig -restore commands are compatible. redundancy when you create it. proceed to the next step. an Oracle ASM disk group, then ensure that the This section describes how to manage OCR and the Oracle Local Registry (OLR) with the following utilities: OCRCONFIG, OCRDUMP, and OCRCHECK. high redundancy for OCR, you must configure the disk group with high Ensure that the Oracle ASM disk group you specify exists and is mounted. 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. and later releases. Note that the commands you use to do this are different, depending on whether your voting disks are located in Oracle ASM, or are located in another storage option. To add one or more voting files, run the following command, replacing the path_to_voting_disk variable with one or more space-delimited, complete paths to the voting files you want to add: To replace voting file A with voting file B, you must add voting file B, and then delete voting file A. Oracle increased the Oracle Clusterware shared storage requirement to accommodate the Grid Infrastructure Management Repository, which can be a network file system (NFS), cluster file system, or an Oracle ASM disk group. Use the backup and restore Ensure that the OCR devices that you specify in the OCR configuration exist and that these OCR devices are valid. If it is, stop it by running the following command as a member of the Administrators group: Do not use the -init flag in any other command. OCR is used in a variety of applications, such as scanning documents and recognizing text in images. The Oracle installation process for Oracle Clusterware gives you the option of automatically mirroring OCR. In general, a flex disk group enables users to manage storage at the granularity of the database, in addition to at the disk group level. OCR has a mechanism that prevents data loss due to accidental overwrites. Ensure that the Oracle ASM disk group that you specify exists and is mounted. 577), We are graduating the updated button styling for vote arrows, Statement from SO: June 5, 2023 Moderator Action. "OCRDUMP Utility Syntax and Options" for more information about the OCRDUMP utility, "Using the OCRCHECK Utility" for more information about the OCRCHECK utility. At least three OCR locations, if OCR is configured on non-mirrored or non-redundant storage. The Oracle Clusterware installation process creates the voting disk and the OCR on shared storage. Restore from one of the automatic physical backups using ocrconfig -restore. The ocrconfig -manualbackup and ocrconfig -restore commands are compatible. How do I backup my OCR files? - Thecrucibleonscreen.com /home/oracle/.bash_profile [root@primary01 ~]# cd /backup/ [root@primary01 backup]# ocrconfig -export ocr_backup_`date +%Y%m%d`.dmp The two file formats are incompatible and must not be interchangeably used. Ramesh B: OCR, Voting and OLR files - rameshoradba.blogspot.com Disks in the quorum failure group do not contain user data, therefore a quorum failure group is not considered when determining redundancy requirements in respect to storing user data.
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