Oracle ASM on ScaleIO Best Practices - Dell Technologies OMR technology scans a printed form and reads from predefined positions. To add an OCRMIRROR device when only OCR device is defined: 3. OCR and Voting Disk WebOracle recommends just two diskgroups by default: A DATA diskgroup to hold all data, index, undo and temp files. Learn how your comment data is processed. This command updates the OCR configuration on all of the nodes on which Oracle Clusterware is running. For eg, if you have 5 voting disks, a node must be able to access at least 3 of the voting disks. 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. 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. WebThe voting disk is a file that manages information about node membership, and the OCR is a file that manages cluster and Oracle RAC database configuration information. 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. Ensure there is at least 280 MB of space on the mount partition. Move the SPFILE to newdiskgroup. 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. Create the New Diskgroup in ASM for moving OCR, VotingDisk and SPFILE The location of OLR can be found in /etc/oracle/olr.loc. This is called NETWORK HEARTBEAT. 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. I am installing two node Oracle 11gR1 RAC on Solaris. It records the data where marks are made on the form. However, overriding the protection mechanism can result in the loss of data that was not available when the previous known good state was created. 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. OCR stores configuration information in a series of key-value pairs in a tree structure. OCR is more commonly used than Voting Disk. c)A node must be able to access more than half of the voting disks at any time. Voting files which record node membership information. Comments. 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. to Backup OCR and Voting Disk This section describes how to back up OCR content and use it for recovery. 1. Generally, the following information is found in the OLR. 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. 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. 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. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. Ocr It will also provide steps to move OCR / voting and ASM devices from raw device to block device. 1. Voting Disk Few possible scenarios:1. Successful addition of voting disk fa21c52bdf245d89acb2ae7bb245e193. 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. 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. Nytro.ai uses technology that works best in other browsers. [root@NODE01 ~]# /u01/app/11.2.0.4/grid/bin/ocrcheck, --Delete the old diskgroup +OCRVD_DG/RAC-cluster/asmparameterfile/registry.183.284573136. 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. Ensure that the file you created is visible from all nodes in the cluster. Restore OCR with an OCR backup that you can identify in "Listing Backup Files" by running the following command as root: If you configured OCR in an Oracle ASM disk group, then ensure that the Oracle ASM disk group exists and is mounted. OCR and Voting Disk At least two OCR locations if OCR is configured on an Oracle ASM disk group. col header_status for a20 The -manualbackup option is especially useful when you want to obtain a binary backup on demand, such as before you make changes to OCR. 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. These backups are stored for a week and written in a round-robin fashion. 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. Voting files. You must specify enough failure groups in each disk group to support the redundancy type for that disk group. the OCR, VotingDisk and spfile to new Break-in heartbeat indicates a possible error scenario. Oracle ASM on ScaleIO Best Practices - Dell Technologies To remove storage configurations no longer in use, run the following command as root: Run this command for every configured OCR. When exporting OLR, Oracle recommends including "olr", the host name, and the timestamp in the name string. Our storage is EMC SAN. Use the following procedure to import OCR on Linux or UNIX systems: Check whether crsd is running. The Oracle Clusterware installation process creates the voting disk and the OCR on shared storage. What is voting disks in RAC Find the temp usage by sessions in Oracle. 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. Check the SPFILE location. [grid@NODE01 ~]$ asmcmd spmove '+OCRVD_DG/RAC-cluster/asmparameterfile/registry.183.284573136' '+OCR_NEWDG/RAC-cluster/spfileASM.ora', --Verify Will install binaries on local disk and use SAN for Voting disk, OCR and ASM. Oracle Cluster Registry (OCR) which records cluster configuration information. If you cannot resolve the problem that caused the CLSD message, then run the command ocrconfig -overwrite to start the node. Begin to start Oracle Clusterware by running the following command as root on all of the nodes: Verify OCR integrity of all of the cluster nodes that are configured as part of your cluster by running the following CVU command: Use the following procedure to restore OCR on Windows systems: Stop Oracle Clusterware by running the following command as a member of the Administrators group 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 a member of the Administrators group on all of the nodes: Start the Oracle Clusterware stack on one node in exclusive mode by running the following command as a member of the Administrators group: Restore OCR with the OCR backup file that you identified in "Listing Backup Files" by running the following command as a member of the Administrators group: Make sure that the OCR devices that you specify in the OCR configuration exist and that these OCR devices are valid. Once you configure voting disks on Oracle ASM, you can only make changes to the voting disks' configuration using the crsctl replace votedisk command. 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. Learn how your comment data is processed. "OCRCONFIG Command Reference" for more information about OCRCONFIG commands. Manage OLR using the OCRCHECK, OCRDUMP, and OCRCONFIG utilities as root with the -local option. To downgrade, follow the downgrade instructions for each component and also downgrade OCR using the ocrconfig -downgrade command. This section describes how to manage OCR and the Oracle Local Registry (OLR) with the following utilities: OCRCONFIG, OCRDUMP, and OCRCHECK. c)A node must be able to access more than half of the voting disks at any time. Make sure that xdpyinfo exist under PATH variable. 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. How do you write a referee report for a job application? Each node reads its KILL BLOCK once per second, if the kill block is not overwritten, the node commits suicide. For Oracle Clusterware 12c, please refer to Software Patch Level and 12c Grid Infrastructure OCR Backup/Restore. It was introduced in 11gR2, and is not shared by any other node in the cluster. 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. Under no circumstances will the failure of one Oracle ASM instance on one node affect the whole cluster. Thus heartbeat of various nodes is recorded at different offsets in the voting disk. WebOCR and Voting Disk. For steps on this check the documentation: Oracle Database Oracle Clusterware and Oracle Real Application Clusters Administration and Deployment Guide. Oracle Local Registry is OCRs local counterpart. 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. Ensure that the OCR devices that you specify in the OCR configuration exist and that these OCR devices are valid. RAC heartbeat is the polling mechanism that is sent over the cluster interconnect to ensure all RAC. 10. 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. For eg, if you have 5 voting disks, a node must be able to access at least 3 of the voting disks.