Ensure that the most recent OCR contains the latest OCR updates. Its application is in surveys, answer sheets, questionnaires and ballots. CSSD is a mutithreaded process.So it use various thread to monitor the heart beat. In 10g, Oracle Clusterware can support 32 voting disks but in 11g R 2 supports 15 voting disks. You must specify enough failure groups in each disk group to support the redundancy type for that disk group. 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. Check the SPFILE location. +OCR_NEWDG/RAC-cluster/spfileASM.ora. You cannot repair the OCR configuration on a node on which the Oracle Cluster Ready Services daemon is running. The Oracle Clusterware (Oracle Grid Infrastructure GI stack in 11gR2) uses OCR to manage resources and node membership information. When using a mix of storage pools with both high capacity spinning disks and high performance solid state devices additional diskgroups should be considered, which correspond to the different performance storage pools. 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. 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. It also acts as a bootstrap for the Cluster Synchronization Services Daemon (CSSd) for port information, nodes and disks. Oracle Universal Installer for Oracle Clusterware 11g release 2 (11.2), does not support the use of raw or block devices. c)A node must be able to access more than half of the voting disks at any time. on Oct 5 2010. 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. Successful deletion of voting disk 8b62c257e7fa2bfabf363cb4791c1f4c. OCR is used in a variety of applications, such as scanning documents and recognizing text in images. OCR and Voting Disk Rely on OCR Backups Since 11g (11.2), 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. You can have up to five OCR locations. If you choose to put the voting disks into an Oracle ASM disk group, then Oracle ASM ensures the configuration of multiple voting disks if you use a normal or high redundancy disk group. Attempt to resolve the cause of the CLSD-1009 and CLSD-1011 messages. [grid@RAC1 ~]$ asmcmd spget OCR stores Oracle Clusterware and Oracle RAC database configuration information WebOCR manages Oracle Clusterware and Oracle RAC database configuration information OLR resides on every node in the cluster and manages Oracle Clusterware configuration information for each particular node Voting disks The following example shows how to migrate two OCRs to Oracle ASM using OCRCONFIG. This post has been answered by user00726 on Sep 7 2010. 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. The Oracle Clusterware installation process creates the voting disk and the OCR on shared storage. Oracle recommends that you use the -manualbackup and -restore commands and not the -import and -export commands. If the configurations do not match, run ocrconfig -repair. Attempt to correct the problem using the OCR restoration procedure for your platform. It contains manageability information about Oracle Clusterware, including dependencies between various services. # /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/). The file format generated by ocrconfig -restore is incompatible with the file format generated by ocrconfig -export. Oracle ASM on ScaleIO Best Practices - Dell Technologies Oracle Cluster Registry (OCR) which records cluster configuration information. If you are storing OCR on an Oracle ASM disk group, and that disk group is corrupt, then you must restore the Oracle ASM disk group using Oracle ASM utilities, and then mount the disk group again before recovering OCR. Oracle does not support storing OCR on different storage types simultaneously, such as storing OCR on both Oracle ASM and a shared file system, except during a migration. It stores information about the local node only, mainly related to the OHASd (as we will see below). 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. The OLR only supports manual backups. 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). 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 OCR contains information about all Oracle resources in the cluster. When exporting OCR, Oracle recommends including "ocr", the cluster name, and the timestamp in the name string. 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. 3. You cannot inspect the contents of an export. 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. For steps on this check the documentation: Oracle Database Oracle Clusterware and Oracle Real Application Clusters Administration and Deployment Guide. Added on Sep 7 OCR and Voting Disk 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. Once an OCR location is created, it does not get updated in the Oracle Restart environment. 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. If OCR is not available or it is corrupt, then you must restore OCR as described in "Restoring Oracle Cluster Registry". The first method uses automatically generated OCR copies and the second method enables you to issue a backup command manually: Automatic backups: Oracle Clusterware automatically creates OCR backups every four hours. 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. Voting Disk, should it be WebOCR and Voting Disk. If you run the ocrconfig -add | -repair | -replace command, then the device, file, or Oracle ASM disk group that you are adding must be accessible. 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. 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. (Both primary and mirrors) 2. You cannot directly influence the number of voting disks in one disk group. OCR has a mechanism that prevents data loss due to accidental overwrites. We and our partners share information on your use of this website to help improve your experience. These files can be stored either in ASM or in shared storage. OCR If it cannot access the minimum of voting disks, then it is evicted/removed from the cluster. Will install binaries on local disk and use SAN for Voting disk, OCR and ASM. 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. OCR manages Oracle Clusterware and Oracle RAC database configuration information, OLR resides on every node in the cluster and manages Oracle Clusterware configuration information for each particular node, Voting disks manage information about node membership. 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. Repairing an OCR involves either adding, deleting, or replacing an OCR location. Worked as a Development and Database Administrator. 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 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. OCR is more commonly used than Voting Disk. However, each successive run must point to a different disk group. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()); if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'techgoeasy_com-large-billboard-2','ezslot_4',129,'0','0'])};__ez_fad_position('div-gpt-ad-techgoeasy_com-large-billboard-2-0');if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'techgoeasy_com-large-billboard-2','ezslot_5',129,'0','1'])};__ez_fad_position('div-gpt-ad-techgoeasy_com-large-billboard-2-0_1');if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'techgoeasy_com-large-billboard-2','ezslot_6',129,'0','2'])};__ez_fad_position('div-gpt-ad-techgoeasy_com-large-billboard-2-0_2');if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'techgoeasy_com-large-billboard-2','ezslot_7',129,'0','3'])};__ez_fad_position('div-gpt-ad-techgoeasy_com-large-billboard-2-0_3');.large-billboard-2-multi-129{border:none!important;display:block!important;float:none!important;line-height:0;margin-bottom:2px!important;margin-left:auto!important;margin-right:auto!important;margin-top:2px!important;max-width:100%!important;min-height:250px;min-width:300px;padding:0;text-align:center!important}, Enter your email address to subscribe to this blog and receive notifications of new posts by email. (LogOut/ You cannot use the crsctl add | delete votedisk commands on voting disks stored in Oracle ASM disk groups because Oracle ASM manages the number of voting disks according to the redundancy level of the disk group. Our storage is EMC SAN. 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. Since Oracle Database 11gR2 it is recommended to store the OCR and Voting Files in a standalone ASM diskgroup, as shown in Table 3. 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. WebOracle recommends just two diskgroups by default: A DATA diskgroup to hold all data, index, undo and temp files. This chapter includes the following topics: Managing Oracle Cluster Registry and Oracle Local Registry. difference between OCR and voting disk You can find the location of the OCRFILE using one of the tow methods below. (Both primary and mirrors)2. Once you configure voting disks on Oracle ASM, you can only make changes to the voting disks' configuration using the crsctl replace votedisk command. You cannot restore your configuration from an OCR backup file using the -import option, which is explained in "Administering Oracle Cluster Registry with Oracle Cluster Registry Export and Import Commands". to Restore OCR and Voting Disk 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. Difference between You must create an empty (0 byte) OCR location, or the Oracle ASM disk group must exist and be mounted.

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