Oracle Cluster Registry (OCR) which records cluster configuration information. 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 improve Oracle Clusterware storage manageability, OCR is configured, by default, to use Oracle ASM in Oracle Database 11g release 2 (11.2). 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. --add the new diskgroup with root user. # /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/). It contains manageability information about Oracle Clusterware, including dependencies between various services. Optical Mark Reader (OMR) is the technology of electronically extracting data from marked fields such as checkboxes or bubbles from pre-printed forms. Create the New Diskgroup in ASM for moving OCR, VotingDisk and SPFILE 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. 3) CSSD process in each RAC maintains the heartbeat in a block of size 1 OS block in the hot block of the voting disk at a specific offset. OMR technology scans a printed form and reads from predefined positions. Use the procedure in this section to add an OCR location. Jump to Answer. 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 OCR stores Oracle Clusterware and Oracle RAC database configuration information The ocrconfig -replace command requires that at least two OCR locations are configured. If this problem is local to only one node, you can use other nodes to start your cluster database. RAC heartbeat is the polling mechanism that is sent over the cluster interconnect to ensure all RAC nodes are available. c)A node must be able to access more than half of the voting disks at any time. 1. 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. The Oracle Clusterware installation process creates the voting disk and the OCR on a shared storage volume. My test systems OLR files has about 651 keys. 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. This allows for the FRA diskgroup to be restored at a time slightly ahead of DATA, allowing Oracle to perform additional database recovery through the application of archivelogs. 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. Hi, How the voting disk differ from the OCR. Disk Group ocr_newdg is running on node01,node02, 8. It does not require an advanced level recognition engine when compared to OCR. It contains key value pairs of various resources in the cluster. This process is called DISK HEARTBEAT. [root@NODE01 ~]# /u01/app/11.2.0.4/grid/bin/ocrcheck, --Delete the old diskgroup At least two OCR locations if OCR is configured on an Oracle ASM disk group. If a resource fails, then before attempting to restore OCR, restart the resource. 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. For example, if you have configuration problems that you cannot resolve, or if you are unable to restart Oracle Clusterware after such changes, then restore your configuration using the procedure for your platform. OCR stores configuration information in a series of key-value pairs in a tree structure. The number of voting files you can store in a particular Oracle ASM disk group depends upon the redundancy of the disk group. Will install binaries on local disk and use SAN for Voting disk, OCR and ASM. If you are upgrading OCR, then you can use the OCRCHECK utility to verify the integrity of OCR. Cloud Applications; Cloud Infrastructure; On-Premise Applications; E-Business Suite; [root@NODE01 ~]# /u01/app/11.2.0.4/grid/bin/ocrconfig -add +OCR_NEWDG, --Verify the OCR is show in two diskgroup Do this by using the ocrconfig -export command, which exports OCR content to a file format. acknowledge that you have read and understood our, Data Structure & Algorithm Classes (Live), Data Structures & Algorithms in JavaScript, Data Structure & Algorithm-Self Paced(C++/JAVA), Full Stack Development with React & Node JS(Live), Android App Development with Kotlin(Live), Python Backend Development with Django(Live), DevOps Engineering - Planning to Production, GATE CS Original Papers and Official Keys, ISRO CS Original Papers and Official Keys, ISRO CS Syllabus for Scientist/Engineer Exam, Interview Preparation For Software Developers. Oracle Local Registry is OCRs local counterpart. The OLR only supports manual backups. such as Oracle RAC databases, listeners, virtual IP addresses (VIPs), and services and any applications. WebHello Friends,Here with one more topic on database administration guide. 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. If it cannot access the minimum of voting disks, then it is evicted/removed from the cluster. Basic information about the resources, their location, permissions, current value, type, state, etc. It contains the following information shared across the nodes in the cluster. --Connect with SQLPLUS ASM instance 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 Is it illegal to lie about a felony on an application? We and our partners share information on your use of this website to help improve your experience. 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. Run the following command to verify the current running version: Use the Oracle ASM Configuration Assistant (ASMCA) to configure and start Oracle ASM on all nodes in the cluster. 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. col header_status for a20 What is NETWORK and DISK HEARTBEAT and how does it register in VOTING DISKS/FILES? Restore Voting Disk Since we have restored OCR, we restored voting file as well. Generally, the following information is found in the OLR. CRS-4266: Voting file(s) successfully replaced, 9. 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. If all of the voting disks are corrupted, then you can restore them, as follows: Restore OCR as described in "Restoring Oracle Cluster Registry", if necessary. 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. How do you write a referee report for a job application? 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. OLR is a registry similar to OCR located on each node in a cluster, but contains information specific to each node. 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. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. You must create an empty (0 byte) OCR location, or the Oracle ASM disk group must exist and be mounted. WebOracle recommends just two diskgroups by default: A DATA diskgroup to hold all data, index, undo and temp files. The new OCR file, device, or disk group must be accessible from all of the active nodes in the cluster. ERROR: Unable to verify the graphical display setup. 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. Disk heartbeat is successful, but network heartbeat is missed.3. Failure groups are used to determine which Oracle ASM disks to use for storing redundant data. OCR contains information about all Oracle resources in the cluster. Helpful tips . Voting Disk. 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. 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. Learn how your comment data is processed. Before you add, delete, replace, or restore voting disks, run the ocrcheck command as root. The OLR and GPnP profile are required to start the HA service stack. At this time VOTING DISK is used to communicate the node and trace information, which node is in the offline stage. 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. 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. The following example shows how to migrate OCR from Oracle ASM to block devices using OCRCONFIG. If you did not store voting disks in Oracle ASM, then run the following command using the File Universal Identifier (FUID) obtained in the previous step: Stop the Oracle Clusterware stack as root: Restart the Oracle Clusterware stack in normal mode as root: You can add, remove, and migrate voting disks after you install Oracle Clusterware. 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. 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. Majority of the keys in the OCRDUMPFILE deal with the CRSd. OCR is used in a variety of applications, such as scanning documents and recognizing text in images. 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. If all voting disks are corrupted, however, you can restore them as described in "Restoring Voting Disks". "OCRDUMP Utility Syntax and Options" for more information about the OCRDUMP utility, "Using the OCRCHECK Utility" for more information about the OCRCHECK utility. Ensure that the Oracle ASM disk group you specify exists and is mounted. You can manually put the mirrored OCRs on a shared network file system (NFS), or on any cluster file system that is certified by Oracle. Below is a table of differentiation between Optical Mark Reader (OMR) and Optical Character Reader (OCR): Difference between Optical Character Recognition (OCR) and Magnetic Ink Character Reader (MICR), Difference Between Electric Potential and Potential Difference, Difference between EMF and Potential Difference, Difference between Voltage Drop and Potential Difference, Difference between Difference Engine and Analytical Engine, Difference Between Single and Double Quotes in Shell Script and Linux, Difference between Time Tracking and Time and Attendance Software, Difference and Similarities between PHP and C, Similarities and Difference between Java and C++. Run the following command to list the backup files: The ocrconfig -showbackup command displays the backup location, timestamp, and the originating node name of the backup files that Oracle Clusterware creates. Will install binaries on local disk and use SAN for Voting disk, OCR and ASM. Learn how your comment data is processed. Use the following procedure to import OCR on Windows systems: Check whether crsd is running. 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. It was first used in 1914 to help blind people in reading. I am installing two node Oracle 11gR1 RAC on Solaris. OCR is used in a variety of applications, such as scanning documents and recognizing text in images. 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. The text to speech can be used by them. Optical Character Reader (OCR) is used to convert different types of documents such as scanned paper documents, PDF files or images captured by a digital camera into machine-encoded text. 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. Restore Voting Disk Since we have restored OCR, we restored voting file as well. Its application is in surveys, answer sheets, questionnaires and ballots. Oracle strongly recommends that you mirror OCR if the underlying storage is not RAID. Check the SPFILE location. ocrdump should be executed as root to display all the keys available. WebOracle recommends just two diskgroups by default: A DATA diskgroup to hold all data, index, undo and temp files. Helpful tips . 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. 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. Oracle Cluster Registry You must specify enough failure groups in each disk group to support the redundancy type for that disk group. 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. For any work, queries and help. However, if you are unable to start any cluster node in your environment and if you can neither repair OCR nor restore access to all OCR locations, then you can override the protection mechanism. The Oracle Clusterware (Oracle Grid Infrastructure GI stack in 11gR2) uses OCR to manage resources and node membership information. In a nutshell, OCR is used by CRSd and OLR by the OHASd. FAILGROUP fg03 DISK '/dev/oracleasm/disks/OCR_DISK13'; 6. OMR technology scans a printed form and reads from predefined positions. Voting files. Note: After verfied on all nodes then move to OCR Disks. Each node reads its KILL BLOCK once per second, if the kill block is not overwritten, the node commits suicide. The Oracle Clusterware has the OCR and voting disks open and is actively using them. FAILGROUP fg02 DISK '/dev/oracleasm/disks/OCR_DISK12' Hi all, What is the difference b/w OCR and Voting Disk. 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. 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 means that a device must exist. 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. The visually impaired people find it useful. The ocrconfig -manualbackup and ocrconfig -restore commands are compatible. CSSD processes (Cluster Services Synchronization Daemon) monitor the health of RAC nodes employing two distinct heartbeats: Network heartbeat and Disk heartbeat.
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