CSSD is a mutithreaded process.So it use various thread to monitor the heart beat. OCR It does not require an advanced level recognition engine when compared to OCR. Mount and check status Diskgroup in all Nodes Its application is in google books, bank statements, business documents etc. 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. This post has been answered by user00726 on Sep 7 2010. To migrate voting disks from Oracle ASM to an alternative storage device, specify the path to the non-Oracle ASM storage device with which you want to replace the Oracle ASM disk group using the following command: You can run this command on any node in the cluster. Oracle Clusterware can manage up to five redundant OCR locations. 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. "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. The OLR only supports manual backups. Create the New Diskgroup in ASM for moving OCR, VotingDisk and SPFILE 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. Is it illegal to lie about a felony on an application? It maintains and consists of important details about the cluster nodes membership, such as which node is part of the cluster, who (node) is joining the cluster, and who (node) is leaving the cluster. This section describes how to manage OCR and the Oracle Local Registry (OLR) with the following utilities: OCRCONFIG, OCRDUMP, and OCRCHECK. 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. It provides more accuracy as compared to OCR. A voting disk is a file that manages information about node membership. For eg, if you have 5 voting disks, a node must be able to access at least 3 of the voting disks. In a nutshell, OCR is used by CRSd and OLR by the OHASd. ocrdump should be executed as root to display all the keys available. [grid@RAC1 ~]$ asmcmd spget The OCR cache is updated by the master CRSd process to make is visible to all the nodes in the cluster. --Connect with Grid User You can list backups with the ocrconfig -showbackup command, whereas you must keep track of all generated exports. An FRA diskgroup that holds archivelogs and backups. 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. Successful addition of voting disk B6FF6C1D64B9837D82B1B41D38760445. 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. on Oct 5 2010. Once an OCR location is created, it does not get updated in the Oracle Restart environment. cluster. 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. The destination of OCR file has been replaced. Voting Disk, should it be By default, redo logs and control files are mirrored to both the DATA and FRA diskgroups. 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. 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. difference between OCR and voting disk 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. such as Oracle RAC databases, listeners, virtual IP addresses (VIPs), and services and any applications. 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. 11gR2 can have upto five mirrored copies of OCR. It contains the following information shared across the nodes in the cluster. col name for a20 col header_status for a20 --Connect with SQLPLUS ASM instance 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. 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. difference between OCR and voting disk Importing Oracle Cluster Registry Content on Linux or UNIX Systems, Importing Oracle Cluster Registry Content on Windows Systems. 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. Attempt to resolve the cause of the CLSD-1009 and CLSD-1011 messages. It contains manageability information about Oracle Clusterware, including dependencies between various services. To add the file as an OCR location, 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 more than one OCR location. You can just replace with new voting file on disk group DATA. 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. Successful addition of voting disk 34b3f9458e042b58eb8b601523fb6ef2. WebHello Friends,Here with one more topic on database administration guide. b. In a nutshell, OCR is used by CRSd and OLR by the OHASd. 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. If a resource fails, then before attempting to restore OCR, restart the resource. Voting Disk c)A node must be able to access more than half of the voting disks at any time. 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. OLR is located on local storage on each node in a cluster. You can inspect a backup using the OCRDUMP utility. This site uses Akismet to reduce spam. 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. Oracle 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 disks. [root@NODE01 ~]# /u01/app/11.2.0.4/grid/bin/ocrcheck, --Delete the old diskgroup Recover OCR by running the ocrconfig -restore command, as instructed in the following procedure. Failure groups define disks that share components, such that if one fails then other disks sharing the component might also fail. 3. Its default location is in the path Grid_home/cdata/host_name.olr, where Grid_home is the Oracle Grid Infrastructure home, and host_name is the host name of the node. If an Oracle ASM instance fails on any node, then OCR becomes unavailable on that particular node. [root@NODE01 ~]# /u01/app/11.2.0.4/grid/bin/ocrconfig -add +OCR_NEWDG, --Verify the OCR is show in two diskgroup Perform this operation on every voting disk as needed where voting_disk_name is the name of the active voting disk and backup_file_name is the name of the file to which you want to back up the voting disk contents: Run the following command to recover a voting disk where backup_file_name is the name of the voting disk backup file and voting_disk_name is the name of the active voting disk: Hope you like the information onvoting disks in RAC. At least three OCR locations, if OCR is configured on non-mirrored or non-redundant storage. [root@primary01 ~]# crsctl replace votedisk +DATA Successful addition of voting disk a6f4735a13a64f60bf31092700473fad. Change). 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. Recover the Oracle voting disk when its Move the VotingDisk to new diskgroup. Voting disks contain static and dynamic data. To migrate OCR to Oracle ASM using OCRCONFIG: Ensure the upgrade to Oracle Clusterware 11g release 2 (11.2) is complete. the OCR, VotingDisk and spfile to new What is NETWORK and DISK HEARTBEAT and how does it register in VOTING DISKS/FILES? OCR Typically, one would simply cp or dd the files once the new storage has been presented to the hosts. such as Oracle RAC databases, listeners, virtual IP addresses (VIPs), and services and any applications. Backups are created when the system is online. OCR Voting files. OCR and Voting Disk Helpful tips . Manual backups: Run the ocrconfig -manualbackup command on a node where the Oracle Clusterware stack is up and running to force Oracle Clusterware to perform a backup of OCR at any time, rather than wait for the automatic backup. My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts. 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 Clusterware uses voting files to determine which nodes are members of a OCR WebOCR and Voting Disk. Voting files which record node membership information. 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 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. In such cases, Oracle Database displays an alert message in either Oracle Enterprise Manager, the Oracle Clusterware alert log files, or both. Disk heartbeat is successful, but network heartbeat is missed.3. Oracle Cluster Registry (OCR) which records cluster configuration information. For eg, if you have 5 voting disks, a node must be able to access at least 3 of the voting disks. Just one node is unhealthy. RAC heartbeat is the polling mechanism that is sent over the cluster interconnect to ensure all RAC nodes are available. How do you write a referee report for a job application? Each voting disk must be accessible by all nodes in the cluster for nodes to be members of the cluster. 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. Compare the node's OCR configuration (ocr.loc on Linux and UNIX systems and the Registry on Windows systems) with other nodes on which Oracle Clusterware is running. 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. [root@primary01 ~]# crsctl replace votedisk +DATA Successful addition of voting disk a6f4735a13a64f60bf31092700473fad. Ensure that the Oracle ASM disk group you specify exists and is mounted. Voting Disk. OCR also helps maintain the structure and dependencies that exist in the startup of various resources in the cluster. For example: Using the ocrconfig -export command also enables you to restore OCR using the -import option if your configuration changes cause errors. 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. Note: After verfied on all nodes then move to OCR Disks. In 10g, Oracle Clusterware can support 32 voting disks but in 11g R 2 supports 15 voting disks. 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. There are a few different scenarios possible with missing heartbeats:1. 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. OCR is more commonly used than Voting Disk. Oracle Cluster Registry (OCR) and Oracle Local Registry (OLR) are two very important components of a Grid Infrastructure that help manage the clusterresources. You cannot repair the OCR configuration on a node on which the Oracle Cluster Ready Services daemon is running. OMR technology scans a printed form and reads from predefined positions. 3. Oracle Cluster Registry The ocrconfig -export and ocrconfig -import commands are compatible. 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. What is voting disks in RAC 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. The ocrconfig -replace command requires that at least two OCR locations are configured. If you cannot resolve the problem that caused the CLSD message, then run the command ocrconfig -overwrite to start the node. Our storage is EMC SAN. to Backup OCR and Voting Disk voting disk [root@NODE01 ~]# /u01/app/11.2.0.4/grid/bin/crsctl query css votedisk, 3. Recover the Oracle voting disk when its Successful addition of voting disk fa21c52bdf245d89acb2ae7bb245e193. If you cannot mount the disk group locally, then run the following SQL*Plus command: Optionally, if you want to restore OCR to a raw device, then you must run the ocrconfig -repair -replace command as root, assuming that you have all the necessary permissions on all nodes to do so and that OCR was not previously on Oracle ASM. # /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 '
