Learn how your comment data is processed. Attempt to correct the problem using the OCR restoration procedure for your platform. Use ASMCA to create an Oracle ASM disk group that is at least the same size of the existing OCR and has at least normal redundancy. My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts. For eg, if you have 5 voting disks, a node must be able to access at least 3 of the voting disks. Successful deletion of voting disk da722ae356dd2e3ee871601add127e3c. 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. --Connect with Grid User 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. 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. [root@primary01 ~]# crsctl replace votedisk +DATA Successful addition of voting disk a6f4735a13a64f60bf31092700473fad. OCR and Voting Disk Ensure that the file you created is visible from all nodes in the cluster. -- Mount diskgroup You should configure OCR in two independent disk groups. 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. If the OCR mirror and OCR have been deleted, then it may be faster to restore the OCR using the OCR backups. 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. 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. Fill in your details below or click an icon to log in: You are commenting using your WordPress.com account. on Oct 5 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. However, if you upgrade from a previous Oracle Clusterware release, then you can continue to use raw or block devices. Managing Oracle Cluster Registry and Voting Disks voting disk 10. For steps on this check the documentation: Oracle Database Oracle Clusterware and Oracle Real Application Clusters Administration and Deployment Guide. # /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/). Will install binaries on local disk and use SAN for Voting disk, OCR and ASM. This post has been answered by user00726 on Sep 7 2010. 3. 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. OCR and Voting Disk 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. The OCR file is automatically backed up locally in $ORA_CRS_HOME/cdata/ every four hours (note timestamp of backup*.ocr files below). By default, redo logs and control files are mirrored to both the DATA and FRA diskgroups. You must shut down Oracle Clusterware on all nodes in the cluster to get a consistent snapshot using the ocrconfig -export command. d) All nodes in the RAC cluster register their heartbeat information in the voting disks/files. You must create an empty (0 byte) OCR location, or the Oracle ASM disk group must exist and be mounted. In Oracle Clusterware 11g release 2 (11.2), you no longer have to back up the voting disk. If you did not store voting disks in Oracle ASM, then run the following command using the File Universal Identifier (FUID) obtained in the previous step: Stop the Oracle Clusterware stack as root: Restart the Oracle Clusterware stack in normal mode as root: You can add, remove, and migrate voting disks after you install Oracle Clusterware. Voting Disk Ensure there is at least 280 MB of space on the mount partition. Required fields are marked *. It also acts as a bootstrap for the Cluster Synchronization Services Daemon (CSSd) for port information, nodes and disks. such as Oracle RAC databases, listeners, virtual IP addresses (VIPs), and services and any applications. OCR stores Oracle Clusterware and Oracle RAC database configuration information Backups are created when the system is online. The ocrconfig -replace command requires that at least two OCR locations are configured. Oracle Clusterware uses voting files to determine which nodes are members of a Check the Voting Disk Location Typically this is the work area and the recovery area. Static data: Info about nodes in the cluster. [grid@NODE01 ~]$ crsctl query css votedisk. Ensure that Oracle ASM disk groups that you create are mounted on all of the nodes in the cluster. The OCR cache is updated by the master CRSd process to make is visible to all the nodes in the cluster. to Backup OCR and Voting Disk Voting files. Voting files FAILGROUP fg01 DISK '/dev/oracleasm/disks/OCR_DISK11' If it is, then stop it by running the following command as root: If you want to restore OCR to an Oracle ASM disk group, then you must first create a disk group using SQL*Plus that has the same name as the disk group you want to restore and mount it on the local node. "OCRDUMP Utility Syntax and Options" for more information about the OCRDUMP utility, "Using the OCRCHECK Utility" for more information about the OCRCHECK utility. Move the VotingDisk to new diskgroup. The following example shows how to migrate OCR from Oracle ASM to block devices using OCRCONFIG. Jump to Answer. Both heartbeats failed. Repairing an OCR involves either adding, deleting, or replacing an OCR location. Comments. However, each successive run must point to a different disk group. Successful deletion of voting disk 8b62c257e7fa2bfabf363cb4791c1f4c. 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. When using ScaleIO snapshots, it can be beneficial to snapshot the DATA and FRA diskgroups independently. For Oracle Clusterware 12c, please refer to Software Patch Level and 12c Grid Infrastructure OCR Backup/Restore. These files can be stored either in ASM or in shared storage. OCR Voting Disk, should it be There is an API provided for this function (ocrconfig and crsctl), which is the appropriate interface than typical cp and/or dd commands.It is highly recommended to take a backup of the voting disk, and OCR device before making any changes. However, overriding the protection mechanism can result in the loss of data that was not available when the previous known good state was created. Disk heartbeat is successful, but network heartbeat is missed.3. 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. The text to speech can be used by them. Added on Sep 7 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. 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. If an Oracle ASM instance fails on any node, then OCR becomes unavailable on that particular node. Run the following command to verify the current running version: Use the Oracle ASM Configuration Assistant (ASMCA) to configure and start Oracle ASM on all nodes in the cluster. 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. Voting disks/files are just like attendance registers where you have nodes mark their attendance (heartbeats). Voting Disk. Break-in heartbeats indicate a possible error scenario. It is used in scanning and converting different types of documents. 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. 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. When exporting OLR, Oracle recommends including "olr", the host name, and the timestamp in the name string. Comments. OCR is more commonly used than Voting Disk. By default, OLR is located at Grid_home/cdata/host_name.olr on each node. Difference between OCR WebOCR and Voting Disk. If all voting disks are corrupted, however, you can restore them as described in "Restoring Voting Disks". Optical Mark Reader (OMR) is the technology of electronically extracting data from marked fields such as checkboxes or bubbles from pre-printed forms. Recover the Oracle voting disk when its What are Consumer Forums and what is their importance? Restore Voting Disk Since we have restored OCR, we restored voting file as well. In a nutshell, OCR is used by CRSd and OLR by the OHASd. Voting files which record node membership information. Please do provide the feedback, Related ArticlesWhat is Oracle Clusterware?How to Recreate Central Inventory in Real Applications ClustersHow to add any node to Oracle RAC cluster in 10g and 11gHow to setup diag wait in clusterCluster command in Oracle clusterware 10g and 11gOracle Flex Cluster 12c, Filed Under: Oracle, Oracle Database Tagged With: voting disks, Your email address will not be published. Voting Disk. You can inspect a backup using the OCRDUMP utility. 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. such as Oracle RAC databases, listeners, virtual IP addresses (VIPs), and services and any applications. A normal redundancy disk group must contain at least two failure groups but if you are storing your voting disks on Oracle ASM, then a normal redundancy disk group must contain at least three failure groups. WebOracle recommends just two diskgroups by default: A DATA diskgroup to hold all data, index, undo and temp files. You can manually put the mirrored OCRs on a shared network file system (NFS), or on any cluster file system that is certified by Oracle. Please contact us at contactus@smarttechways.com, How to get DDL of Tablespace present in OracleDatabase, Follow Smart way of Technology on WordPress.com, Exclude/Include option in EXPDP and IMPDP Datapump, Create & grant permission to directory in Oracle, Check the Undo tablespace Usage in Oracle, Check datafiles and tablespace information in Oracle, Check the Patch Applied to the Oracle Database, Stop the EXPDP/IMPDP Datapump Job in Oracle, Find top CPU Consuming Session or SQLs query in Oracle. user13389425 Sep 7 2010 edited Sep 7 2010. Ensure that the Oracle ASM disk group you specify exists and is mounted. Difference between To restore an OCR when clusterware is down. If you store OCR on an Oracle ASM disk group and the disk group is not available, then you must recover and mount the Oracle ASM disk group. 1. The Oracle Clusterware has the OCR and voting disks open and is actively using them. This means that a device must exist. Generally, the following information is found in the OLR. The file format generated by ocrconfig -restore is incompatible with the file format generated by ocrconfig -export. 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. There is an API provided for this function (ocrconfig and crsctl), which is the appropriate interface "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. Oracle ASM on ScaleIO Best Practices - Dell Technologies to Restore OCR and Voting Disk Each voting disk must be accessible by all nodes in the cluster for nodes to be members of the cluster. I am installing two node Oracle 11gR1 RAC on Solaris. 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 exporting OCR, Oracle recommends including "ocr", the cluster name, and the timestamp in the name string. cluster. When the clusterware stack is down on all nodes in the cluster, the backups that are listed by the ocrconfig -showbackup command may differ from node to node. You can remove an OCR location to reduce OCR-related overhead or to stop mirroring your OCR because you moved OCR to redundant storage such as RAID. An example of what you might define as a failure group would be a set of SCSI disks sharing the same SCSI controller. For example, if you ran the ocrconfig -restore command on node 1 of a four-node cluster, then you must run the ocrconfig -repair -replace command on nodes 2, 3, and 4. 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. Make sure that xdpyinfo exist under PATH variable. 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. 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. If one fails it doesnt cause an outage and the failed one can be replaced. Basic information about the resources, their location, permissions, current value, type, state, etc. Perform the following procedure to overwrite OCR if a node cannot start and if the alert log contains CLSD-1009 and CLSD-1011 messages. FAILGROUP fg02 DISK '/dev/oracleasm/disks/OCR_DISK12' Nodes with quorum will maintain active membership of the cluster and other nodes (s) will be fenced/rebooted. Change). Alternatively, you can place OCR on Oracle ASM and allow it to create mirrors automatically, depending on the redundancy option you select. Oracle ASM on ScaleIO Best Practices - Dell Technologies It records the data where marks are made on the form. 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. Your biggest Honkai: Star Rail questions, answered The Oracle Clusterware installation process creates the voting disk and the OCR on shared storage. This is true even in cases where there are no working voting disks. It is used to process data from printed forms. Added on Sep 7 In 10g, Oracle Clusterware can support 32 voting disks but in 11g R 2 supports 15 voting disks. OCR and Voting Disk 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. Each successive run of this command must point to a different file location. 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. It is located on the shared cluster system or a shared raw device file or Oracle ASM(11gr2 onwards) . "OCRCONFIG Command Reference" for more information about OCRCONFIG commands. 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. Important points about Voting disks in Oracle RAC. Use the procedure in this section to add an OCR location. In such cases, Oracle Database displays an alert message in either Oracle Enterprise Manager, the Oracle Clusterware alert log files, or both. Hi, I am working in IT industry with having more than 10 year of experience, worked as an Oracle DBA with a Company and handling different databases like Oracle, SQL Server , DB2 etc This process is called DISK HEARTBEAT. What is voting disks in RAC Database data files, temp files, redo logs and undo, SYSTEM, SYSAUX, DATA, INDEX, USERS, TEMP, UNDO, Shared or database-specific ASM diskgroups, ScaleIO volumes, ASM diskgroup, and database datafile relationship, ASM stripesize, coarse, and fine grained striping, ASM intelligent data placement and physical disk placement, ASM compaction and rebalance (ASM 11.1.0.7 and later), A DATA diskgroup to hold all data, index, undo and temp files, An FRA diskgroup that holds archivelogs and backups, Since Oracle Database 11gR2 it is recommended to store the OCR and Voting Files in a standalone ASM diskgroup, as shown in, Using VMDKs and ASM with Virtualized Databases. 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. 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. Managing Oracle Cluster Registry and Voting Disks OCR is what registry is for Windows. WebHello Friends,Here with one more topic on database administration guide. Oracle Local Registry is OCRs local counterpart. OMR technology scans a printed form and reads from predefined positions. If OCR is stored in an Oracle ASM disk group with external redundancy, then Oracle recommends that you add another OCR location to another disk group to avoid the loss of OCR, if a disk fails in the disk group. WebOracle RAC uses two storage locations, which can be accessed by all cluster members: The Oracle Cluster Registry (OCR) Contains information for managing the cluster The Voting Disk Contains information to determine which nodes are active members of the cluster at any given moment In Oracle RAC 10gRelease 2, these storage locations can 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. Network heartbeat is successful, but disk heartbeat is missed.2. To remove storage configurations no longer in use, run the following command as root: Run this command for every configured OCR. For example, the database cannot be started until the asm resource has come up, or the service resource doesnt start until the database has been started.
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