It records the data where marks are made on the form. However, each successive run must point to a different disk group. 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. Oracle recommends that you do not use more than five voting files, Following are the steps to move OCR, Voting Disk and Spfile to new disk group. Only after you use the replace verb to move voting disks back to non-Oracle ASM storage are the verbs add css votedisk and delete css votedisk again usable. Check the SPFILE location. Break-in heartbeats indicate a possible error scenario. Repairing an OCR involves either adding, deleting, or replacing an OCR location. 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. Under no circumstances will the failure of one Oracle ASM instance on one node affect the whole cluster. 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. c)A node must be able to access more than half of the voting disks at any time. An FRA diskgroup that holds archivelogs and backups. Voting Disk For example, if any node that is part of your current Oracle RAC cluster is shut down, then you must update the OCR configuration on the stopped node to let that node rejoin the cluster after the node is restarted. In 10g, Oracle Clusterware can support 32 voting disks but in 11g R 2 supports 15 voting disks. 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. srvctl status diskgroup -g OCR_NEWDG 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. The voting disk data is automatically backed up in OCR as part of any configuration change and is automatically restored to any voting disk added. Important points about Voting disks in Oracle RAC. Comments. For example: Using the ocrconfig -export command also enables you to restore OCR using the -import option if your configuration changes cause errors. Check the location of OCR Disk from GRID Home with root user. to Backup OCR and Voting Disk It is widely used as a form of data entry from printed paper data records into electronic editable text which can be easily searched, stored etc. OCR CRS-4266: Voting file(s) successfully replaced, 9. The Oracle installation process for Oracle Clusterware gives you the option of automatically mirroring OCR. The Oracle Clusterware has the OCR and voting disks open and is actively using them. OCR and voting disk Difference between such as Oracle RAC databases, listeners, virtual IP addresses (VIPs), and services and any applications. If you scroll through the key names below you will observe that most of the information pertains to the local resources required by OHASd (refer to the flow chart in the earlier post to see which values this file would hold). 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. [grid@NODE01 ~]$ crsctl query css votedisk. If you have only one OCR location configured and online, then you must first add a new location and then delete the failed location, as follows: It may be necessary to repair OCR if your cluster configuration changes while that node is stopped and this node is the only member in the cluster. c)A node must be able to access more than half of the voting disks at any time. It is useful in grading, calculating marks, etc. Our storage is EMC SAN. Please sign in to comment 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. Oracle Cluster Registry (OCR) which records cluster configuration information. Perform the following procedure to overwrite OCR if a node cannot start and if the alert log contains CLSD-1009 and CLSD-1011 messages. Worked as a Development and Database Administrator. If the Oracle Restart home has been backed up, and if there is a failure, then restoring the Oracle Restart home restores OCR. 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. Verify the VotingDisk movement on both nodes. OCR is what registry is for Windows. 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. However, Oracle recommends using several failure groups. Successful deletion of voting disk 8b62c257e7fa2bfabf363cb4791c1f4c. 1. This section includes the following topics for managing voting disks in your cluster: Adding, Deleting, or Migrating Voting Disks. Ensure that Oracle ASM disk groups that you create are mounted on all of the nodes in the cluster. If you configure a single voting disk, then you should use external mirroring to provide redundancy. Its application is in google books, bank statements, business documents etc. This means that a device must exist. The destination of OCR file has been replaced. 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. 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. Find the temp usage by sessions in Oracle. 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). 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. Is it illegal to lie about a felony on an application? If an Oracle ASM instance fails on any node, then OCR becomes unavailable on that particular node. 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. You must specify enough failure groups in each disk group to support the redundancy type for that disk group. External redundancy: A disk group with external redundancy can store only one voting disk, Normal redundancy: A disk group with normal redundancy stores three voting disks, High redundancy: A disk group with high redundancy stores five voting disks. 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. (Both primary and mirrors) 2. Depending on where you store your voting files, do one of the following: If the voting disks are stored in Oracle ASM, then run the following command to migrate the voting disks to the Oracle ASM disk group you specify: The Oracle ASM disk group to which you migrate the voting files must exist in Oracle ASM. It records the data where marks are made on the form. You can check the status of OLR on the local node using the OCRCHECK utility, as follows: You can display the content of OLR on the local node to the text terminal that initiated the program using the OCRDUMP utility, as follows: You can perform administrative tasks on OLR on the local node using the OCRCONFIG utility. In addition to maintaining its own disk block, CSSD processes also monitor the disk block maintained by the CSSD processes of other nodes in the cluster. However, overriding the protection mechanism can result in the loss of data that was not available when the previous known good state was created. 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. If the OCR mirror and OCR have been deleted, then it may be faster to restore the OCR using the OCR backups. By default, redo logs and control files are mirrored to both the DATA and FRA diskgroups. It was first used in 1914 to help blind people in reading. Look at output from the ocrdump command and determine whether it has your latest updates. Ocr While marking their own presence, all the nodes also register the information about their communicability with other nodes in the voting disk. If you upgrade from a previous version of Oracle Clusterware to Oracle Clusterware 11g release 2 (11.2) and you want to store voting disks in an Oracle ASM disk group, then you must set the ASM Compatibility (COMPATIBLE.ASM) compatibility attribute to 11.2.0.0. You cannot add a voting disk to a cluster file system if the voting disks are stored in an Oracle ASM disk group. To replace or move the location of an OCR device, 4. Each node reads its KILL BLOCK once per second, if the kill block is not overwritten, the node commits suicide. OCR is used in a variety of applications, such as scanning documents and recognizing text in images. OCR and Voting Disk 1. 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. c)A node must be able to access more than half of the voting disks at any time. Restore Voting Disk Since we have restored OCR, we restored voting file as well. Cloud Applications; Cloud Infrastructure; On-Premise Applications; E-Business Suite; You must create an empty (0 byte) OCR location, or the Oracle ASM disk group must exist and be mounted. --Connect with Grid User Hope this sheds some light on what role OCR and OLR play in the Grid Infrastructure. Ensure that the file you created is visible from all nodes in the cluster. If OCR is not available or it is corrupt, then you must restore OCR as described in "Restoring Oracle Cluster Registry". Restore OCR by running the following command as root: Run the ocrcheck command to verify the integrity of OCR: Start Oracle High Availability Services by running the following command on all of the nodes: You can use the OCRDUMP and OCRCHECK utilities to diagnose OCR problems. That is to say, as long as you have the latest OCR backup, you automatically have voting disk backup too. Hi, How the voting disk differ from the OCR. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[336,280],'techgoeasy_com-box-4','ezslot_3',192,'0','0'])};__ez_fad_position('div-gpt-ad-techgoeasy_com-box-4-0');1)If it is stored in ASM, no need to configure manually as the files will be created depending on the redundancy in ASM. By default, Oracle ASM puts each voting disk in its own failure group within the disk group. [root@NODE01 ~]# /u01/app/11.2.0.4/grid/bin/ocrcheck, --Delete the old diskgroup The OLR and GPnP profile are required to start the HA service stack. Ensure that the most recent OCR contains the latest OCR updates. For eg, if you have 5 voting disks, a node must be able to access at least 3 of the voting disks. Nytro.ai uses technology that works best in other browsers. Recover the Oracle voting disk when its To remove storage configurations no longer in use, run the following command as root: Run this command for every configured OCR. 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.
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