OCR stores configuration information in a series of key-value pairs in a tree structure. Like, on my test box, ocrdump shows 676(11.2.0.4)keys in the OCR (could be different on your system). 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. Static data: Info about nodes in the cluster. If a resource fails, then before attempting to restore OCR, restart the resource. It was introduced in 11gR2, and is not shared by any other node in the cluster. such as Oracle RAC databases, listeners, virtual IP addresses (VIPs), and services and any applications. 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. Break-in heartbeats indicate a possible error scenario. Move the SPFILE to newdiskgroup. How to Recreate Central Inventory in Real Applications Clusters, How to add any node to Oracle RAC cluster in 10g and 11g, Cluster command in Oracle clusterware 10g and 11g, How to check optimizer statistics preferences at the table level, All nodes in the RAC cluster register their heartbeat information in the voting disks/files. RAC heartbeat is the polling mechanism that is sent over the cluster interconnect to ensure all RAC. Important points about Voting disks in Oracle RAC. For example: The default backup location for the OLR is in the path Grid_home/cdata/host_name. Move the OCR to new diskgroup. RAC heartbeat is the polling mechanism that is sent over the cluster interconnect to ensure all RAC nodes are available. Voting Disk It is the rapid method of data entry. Recover OCR by running the ocrconfig -restore command, as instructed in the following procedure. Oracle recommends that you configure multiple voting disks during Oracle Clusterware installation to improve availability. acknowledge that you have read and understood our, Data Structure & Algorithm Classes (Live), Data Structures & Algorithms in JavaScript, Data Structure & Algorithm-Self Paced(C++/JAVA), Full Stack Development with React & Node JS(Live), Android App Development with Kotlin(Live), Python Backend Development with Django(Live), DevOps Engineering - Planning to Production, GATE CS Original Papers and Official Keys, ISRO CS Original Papers and Official Keys, ISRO CS Syllabus for Scientist/Engineer Exam, Interview Preparation For Software Developers. "Administering Oracle Cluster Registry with Oracle Cluster Registry Export and Import Commands" to use manually created OCR export files to copy OCR content and use it for recovery. OCR and Voting Disk This is widely used for processing the large number of hand-filled forms which have to be processed quickly and with great accuracy. Begin to start Oracle Clusterware by running the following command as a member of the Administrators group on all of the nodes: Run the following Cluster Verification Utility (CVU) command to verify OCR integrity of all of the nodes in your cluster database: OCR is present for backward compatibility. (Both primary and mirrors)2. Manage OLR using the OCRCHECK, OCRDUMP, and OCRCONFIG utilities as root with the -local option. Mirroring can help prevent OCR from becoming a single point of failure. If you must change an existing OCR location, or change a failed OCR location to a working location, then you can use the following procedure, as long as all remaining OCR locations remain online. Run the following command to inspect the contents and verify the integrity of the backup file: You can use any backup software to copy the automatically generated backup files at least once daily to a different device from where the primary OCR resides. It also acts as a bootstrap for the Cluster Synchronization Services Daemon (CSSd) for port information, nodes and disks. OCR stores Oracle Clusterware and Oracle RAC database configuration information For steps on this check the documentation: Oracle Database Oracle Clusterware and Oracle Real Application Clusters Administration and Deployment Guide. OCR is more commonly used than Voting Disk. The Oracle Clusterware (Oracle Grid Infrastructure GI stack in 11gR2) uses OCR to manage resources and node membership information. For eg, if you have 5 voting disks, a node must be able to access at least 3 of the voting disks. Voting Disk Note: After verfied on all nodes then move to OCR Disks. At this time VOTING DISK is used to communicate the node and trace information, which node is in the offline stage. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'techgoeasy_com-leader-1','ezslot_11',195,'0','0'])};__ez_fad_position('div-gpt-ad-techgoeasy_com-leader-1-0');2) In a shared storage system, we need to manually configure these files with a redundancy setup for high availability. [grid@NODE01 ~]$ asmcmd spmove '+OCRVD_DG/RAC-cluster/asmparameterfile/registry.183.284573136' '+OCR_NEWDG/RAC-cluster/spfileASM.ora', --Verify Find the temp usage by sessions in Oracle. OCR is used in a variety of applications, such as scanning documents and recognizing text in images. Backups are created when the system is online. The file format generated by ocrconfig -restore is incompatible with the file format generated by ocrconfig -export. (LogOut/ If you choose to store the voting disks on a cluster file system, then select the option to configure multiple voting disks, in which case you will have to specify three different file systems based on different disks. With the Oracle Clusterware storage residing in an Oracle ASM disk group, you can manage both database and clusterware storage using Oracle Enterprise Manager. Do this by using the ocrconfig -export command, which exports OCR content to a file format. CRS-4266: Voting file(s) successfully replaced, 9. For eg, if you have 5 voting disks, a node must be able to access at least 3 of the voting disks. There is an API provided for this function (ocrconfig and crsctl), which is the appropriate interface Before you add, delete, replace, or restore voting disks, run the ocrcheck command as root. If an Oracle ASM instance fails on any node, then OCR becomes unavailable on that particular node. OCR That is to say, as long as you have the latest OCR backup, you automatically have voting disk backup too. 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. 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. Learn how your comment data is processed. For DBAs planning to use ScaleIO snapshots, a two-diskgroup solution should be considered the minimum, but control files and redo logs should NOT be mirrored to both diskgroups. Your biggest Honkai: Star Rail questions, answered The default location for generating backups on Linux or UNIX systems is Grid_home/cdata/cluster_name, where cluster_name is the name of your cluster. 1. 10. 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. [root@NODE01 ~]# /u01/app/11.2.0.4/grid/bin/ocrcheck, --Delete the old diskgroup Ensure there is at least 280 MB of space on the mount partition. It is useful in grading, calculating marks, etc. Oracle High Availability Services uses this information. Recover the Oracle voting disk when its Below is a table of differentiation between Optical Mark Reader (OMR) and Optical Character Reader (OCR): Difference between Optical Character Recognition (OCR) and Magnetic Ink Character Reader (MICR), Difference Between Electric Potential and Potential Difference, Difference between EMF and Potential Difference, Difference between Voltage Drop and Potential Difference, Difference between Difference Engine and Analytical Engine, Difference Between Single and Double Quotes in Shell Script and Linux, Difference between Time Tracking and Time and Attendance Software, Difference and Similarities between PHP and C, Similarities and Difference between Java and C++. (Both primary and mirrors) 2. 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 configure a mirrored OCR and if Oracle Clusterware cannot access the mirrored OCR locations and also cannot verify that the available OCR location contains the most recent configuration, then Oracle Clusterware prevents further modification to the available OCR location. 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. WebOCR and Voting Disk. By default, the -showbackup option displays information for both automatic and manual backups but you can include the auto or manual flag to display only the automatic backup information or only the manual backup information, respectively. Will install binaries on local disk and use SAN for Voting disk, OCR and ASM. Look at output from the ocrdump command and determine whether it has your latest updates. 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. to Restore OCR and Voting Disk WebOracle recommends just two diskgroups by default: A DATA diskgroup to hold all data, index, undo and temp files. If you configure a single voting disk, then you should use external mirroring to provide redundancy. Added on Sep 7 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. Jump to Answer. You should configure OCR in two independent disk groups. It records the data where marks are made on the form. user13389425 Sep 7 2010 edited Sep 7 2010. To migrate OCR from Oracle ASM to another storage type: Create a file in a shared or cluster file system with the following permissions: root, oinstall, 640. Network heartbeat is successful, but disk heartbeat is missed.2. It will also provide steps to move OCR / voting and ASM devices from raw device to block device. Save my name, email, and website in this browser for the next time I comment. srvctl start diskgroup -g OCR_NEWDG -n NODE01,NODE02, --Check Status select path,name,header_status from v$asm_disk 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. to Restore OCR and Voting Disk Without the voting disk, its difficult to know, whether nodes are facing network problems or nodes are no longer available. WebHello Friends,Here with one more topic on database administration guide. 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. This is called NETWORK HEARTBEAT. If this problem is local to only one node, you can use other nodes to start your cluster database. Run the following command on any node in the cluster to remove an OCR location from either Oracle ASM or other location: The file_name variable can be a device name or a file name. A failure group is a subset of the disks in a disk group. Oracle strongly recommends that you mirror OCR if the underlying storage is not RAID. You must create an empty (0 byte) OCR location, or the Oracle ASM disk group must exist and be mounted. You cannot inspect the contents of an export.
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