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. 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). This is widely used for processing the large number of hand-filled forms which have to be processed quickly and with great accuracy. Successful deletion of voting disk 0e3a9c8e306a2befaf5548b77231be3a. 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. You cannot customize the backup frequencies or the number of files that Oracle Database retains. I am installing two node Oracle 11gR1 RAC on Solaris. the OCR, VotingDisk and spfile to new You cannot inspect the contents of an export. In such cases, Oracle Database displays an alert message in either Oracle Enterprise Manager, the Oracle Clusterware alert log files, or both. WebHello Friends,Here with one more topic on database administration guide. To remove storage configurations no longer in use, run the following command as root: Run this command for every configured OCR. The two file formats are incompatible and must not be interchangeably used. In this case, it is a little more difficult because:1. A high redundancy disk group must contain at least three failure groups. When exporting OCR, Oracle recommends including "ocr", the cluster name, and the timestamp in the name string. When using ScaleIO snapshots, it can be beneficial to snapshot the DATA and FRA diskgroups independently. 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. You can list backups with the ocrconfig -showbackup command, whereas you must keep track of all generated exports. OCR also helps maintain the structure and dependencies that exist in the startup of various resources in the cluster. The number of voting files you can store in a particular Oracle ASM disk group depends upon the redundancy of the disk group. In a nutshell, OCR is used by CRSd and OLR by the OHASd. Disk heartbeat is successful, but network heartbeat is missed.3. Using the crsctl replace votedisk command, you can move a given set of voting disks from one Oracle ASM disk group into another, or onto a certified file system. There is an API provided for this function (ocrconfig and crsctl), which is the appropriate interface Oracle ASM on ScaleIO Best Practices - Dell Technologies If the OCR mirror and OCR have been deleted, then it may be faster to restore the OCR using the OCR backups. Voting files. The Oracle Clusterware installation process creates the voting disk and the OCR on a shared storage volume. [root@NODE01 ~]# /u01/app/11.2.0.4/grid/bin/ocrcheck, --Delete the old diskgroup Move the SPFILE to newdiskgroup. Like, on my test box, ocrdump shows 676(11.2.0.4)keys in the OCR (could be different on your system). For eg, if you have 5 voting disks, a node must be able to access at least 3 of the voting disks. However, if you upgrade from a previous version of Oracle Clusterware, you can migrate OCR to reside on Oracle ASM, and take advantage of the improvements in managing Oracle Clusterware storage. 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. difference between OCR and voting disk Typically, one would simply cp or dd the files once the new storage has been presented to the hosts. 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. In 10g, Oracle Clusterware can support 32 voting disks but in 11g R 2 supports 15 voting disks. At least two OCR locations if OCR is configured on an Oracle ASM disk group. You can have up to five OCR locations. 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. It was introduced in 11gR2, and is not shared by any other node in the cluster. There is an API provided for this function (ocrconfig and crsctl), which is the appropriate interface List the Candidate Disk present for creating DISKGROUP. A-143, 9th Floor, Sovereign Corporate Tower, We use cookies to ensure you have the best browsing experience on our website. You must specify enough failure groups in each disk group to support the redundancy type for that disk group. The Oracle Clusterware has the OCR and voting disks open and is actively using them. The Oracle installation process for Oracle Clusterware gives you the option of automatically mirroring OCR. Majority of the keys in the OCRDUMPFILE deal with the CRSd. If OCR is not available or it is corrupt, then you must restore OCR as described in "Restoring Oracle Cluster Registry". It stands for Optical Character Reader or Optical Character Recognition. Learn Oracle, PHP, HTML,CSS,Perl,UNIX shell scripts, March 19, 2017 by techgoeasy Leave a Comment. 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. Hi, How the voting disk differ from the OCR. For example: The default backup location for the OLR is in the path Grid_home/cdata/host_name. You can inspect a backup using the OCRDUMP utility. [grid@NODE01 ~]$ crsctl query css votedisk. OCR When any node is not able to send a heartbeat to the voting disk, then it will reboot itself.For high availability, Oracle recommends that you have a minimum of three voting disks. Ocr 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 [root@primary01 ~]# crsctl replace votedisk +DATA Successful addition of voting disk a6f4735a13a64f60bf31092700473fad. [root@NODE01 ~]# /u01/app/11.2.0.4/grid/bin/ocrconfig -add +OCR_NEWDG, --Verify the OCR is show in two diskgroup Recover the Oracle voting disk when its Voting files. That is to say, as long as you have the latest OCR backup, you automatically have voting disk backup too. 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. You can use this command whether the voting disks were stored in Oracle ASM or some other storage device. 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 Typically this is the work area and the recovery area. If we are not using a voting disk, then due to network failure, nodes are neither able to communicate with each other nor synchronize with the database, this situation is called a cluster SPLIT-BRAIN problem. Voting files which record node membership information. Optical Mark Reader (OMR) is the technology of electronically extracting data from marked fields such as checkboxes or bubbles from pre-printed forms. For example: Using the ocrconfig -export command also enables you to restore OCR using the -import option if your configuration changes cause errors. 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. 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. [root@primary01 ~]# crsctl replace votedisk +DATA Successful addition of voting disk a6f4735a13a64f60bf31092700473fad. CRS-4266: Voting file(s) successfully replaced, 9. Difference between a) We must have an odd number of disks.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'techgoeasy_com-large-leaderboard-2','ezslot_13',194,'0','0'])};__ez_fad_position('div-gpt-ad-techgoeasy_com-large-leaderboard-2-0'); b)Oracle recommends a minimum of 3 and a maximum of 5. 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. 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. 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. The ocrconfig -export and ocrconfig -import commands are compatible. Hi all, What is the difference b/w OCR and Voting Disk. The new OCR file, device, or disk group must be accessible from all of the active nodes in the cluster. OCR 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. The ocrconfig -manualbackup and ocrconfig -restore commands are compatible. 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. 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.
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