The two file formats are incompatible and must not be interchangeably used. Both heartbeats failed. -- Mount diskgroup To add OCR to an Oracle ASM disk group, 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 multiple OCR locations. By default, redo logs and control files are mirrored to both the DATA and FRA diskgroups. The Oracle Clusterware installation process creates the voting disk and the OCR on shared storage. 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. You must create an empty (0 byte) OCR location, or the Oracle ASM disk group must exist and be mounted. The number of voting files you can store in a particular Oracle ASM disk group depends upon the redundancy of the disk group. ocrdump should be executed as root to display all the keys available. It stores information about the local node only, mainly related to the OHASd (as we will see below). Cluster management is now affected on this particular node. If this problem is local to only one node, you can use other nodes to start your cluster database. 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. Check whether crsd is running. By default, Oracle ASM puts each voting disk in its own failure group within the disk group. This section includes the following topics for managing voting disks in your cluster: Adding, Deleting, or Migrating Voting Disks. OCR and Voting Disk Recover the Oracle voting disk when its Change), You are commenting using your Facebook account. There are a few different scenarios possible with missing heartbeats:1. 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. On Windows, use a dir command if the OCR location is a file and run GuiOracleObjectManager.exe to verify that the part of the cluster with the name exists. The Oracle Clusterware installation process creates the voting disk and the OCR on shared storage. 10. 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. A small number of failure groups, or failure groups of uneven capacity, can create allocation problems that prevent full use of all of the available storage. For steps on this check the documentation: Oracle Database Oracle Clusterware and Oracle Real Application Clusters Administration and Deployment Guide. The new OCR file, device, or disk group must be accessible from all of the active nodes in the cluster. For DBAs planning to use ScaleIO snapshots, a two-diskgroup solution should be considered the minimum, but control files and redo logs should NOT be mirrored to both diskgroups. It will also provide steps to move OCR / voting and ASM devices from raw device to block device. Modifying voting disks that are stored in Oracle ASM. If a resource fails, then before attempting to restore OCR, restart the resource. 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. I am installing two node Oracle 11gR1 RAC on Solaris. cluster. Network heartbeat is successful, but disk heartbeat is missed.2. 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. Voting Disk In 10g, Oracle Clusterware can support 32 voting disks but in 11g R 2 supports 15 voting disks. It provides more accuracy as compared to OCR. Oracle recommends that you use either automatic or manual backups, and the ocrconfig -restore command instead of the ocrconfig -export and ocrconfig -import commands to restore OCR for the following reasons: A backup is a consistent snapshot of OCR, whereas an export is not. Oracle High Availability Services uses this 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. You cannot add a voting disk to a cluster file system if the voting disks are stored in an Oracle ASM disk group. Basic information about the resources, their location, permissions, current value, type, state, etc. WebOracle recommends just two diskgroups by default: A DATA diskgroup to hold all data, index, undo and temp files. 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++. However, if you upgrade from a previous Oracle Clusterware release, then you can continue to use raw or block devices. If it is, stop it by running the following command as root: Import OCR by running the following command as root: If you are importing OCR to a cluster or network file system, then skip to step 7. This site uses Akismet to reduce spam. Remove an OCR location if, for example, your system experiences a performance degradation due to OCR processing or if you transfer your OCR to RAID storage devices and choose to no longer use multiple OCR locations, as described in the "Removing an Oracle Cluster Registry Location" section. Ensure that the most recent OCR contains the latest OCR updates. 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. Will install binaries on local disk and use SAN for Voting disk, OCR and ASM. Managing Oracle Cluster Registry and Voting Disks Comments. 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. Will install binaries on local disk and use SAN for Voting disk, OCR and ASM. 4) If the disk is not updated in a short timeout period, the node is considered unhealthy and maybe rebooted to protect the database. In this case, a message to this effect is written in the KILL BLOCK of the node. b. 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. 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. Just one node is unhealthy. The Oracle Clusterware has the OCR and voting disks open and is actively using them. Oracle Cluster Registry (OCR) which records cluster configuration information. If the Oracle Restart home has been backed up, and if there is a failure, then restoring the Oracle Restart home restores OCR. 1. This post has been answered by user00726 on Sep 7 2010. This post has been answered by user00726 on Sep 7 2010. col name for a20 4. Important points about Voting disks in Oracle RAC. Voting disks contain static and dynamic data. You can manually mirror OCR, as described in the "Adding an Oracle Cluster Registry Location" section, if you: Upgraded to Oracle Clusterware 11g release 2 (11.2) but did not choose to mirror OCR during the upgrade, Created only one OCR location during the Oracle Clusterware installation. 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. The ocrconfig -export and ocrconfig -import commands are compatible. Run the following command on any node in the cluster to remove an OCR location from either Oracle ASM or other location: The file_name variable can be a device name or a file name. 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. 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. such as Oracle RAC databases, listeners, virtual IP addresses (VIPs), and services and any applications. "OCRDUMP Utility Syntax and Options" for more information about the OCRDUMP utility, "Using the OCRCHECK Utility" for more information about the OCRCHECK utility. Ocr 2) CSSD process on every node makes entries in the voting disk to ascertain the membership of the node. Successful deletion of voting disk 0e3a9c8e306a2befaf5548b77231be3a. 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. 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. Each successive run of this command must point to a different file location. If you are upgrading OCR, then you can use the OCRCHECK utility to verify the integrity of OCR. Restoring the Oracle Cluster Registry on Linux or UNIX Systems, Restoring the Oracle Cluster Registry on Windows Systems, Restoring the Oracle Cluster Registry in an Oracle Restart Environment. Verify the VotingDisk movement on both nodes. 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. The Oracle Clusterware has the OCR and voting disks open and is actively using them. The goal of this note is to provide steps to add, remove, replace or move an Oracle Cluster Repository (OCR) and/or Voting Disk in Oracle Clusterware 10gR2, 11gR1 and 11gR2 environment. 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. --With Spmove command we will move the spfile Perform the following procedure to overwrite OCR if a node cannot start and if the alert log contains CLSD-1009 and CLSD-1011 messages. Oracle does not support having voting disks in Oracle ASM and directly on a cluster file system for the same cluster at the same time. 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. If an OCR location suddenly becomes unavailable, then it might take a short period for Oracle Clusterware to show the change in status. 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. Oracle Clusterware can manage up to five redundant OCR locations. If the OCR mirror and OCR have been deleted, then it may be faster to restore the OCR using the OCR backups. For any work, queries and help. Check the location of OCR Disk from GRID Home with root user. The OCR file is automatically backed up locally in $ORA_CRS_HOME/cdata/ every four hours (note timestamp of backup*.ocr files below). The following example shows how to migrate two OCRs to Oracle ASM using OCRCONFIG. OCR Nodes have split into N sets of nodes, communicating within the set, but not with members in another set.2. The ocrconfig -replace command requires that at least two OCR locations are configured. the OCR, VotingDisk and spfile to new 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. Will install binaries on local disk and use SAN for Voting disk, OCR and ASM. Move the VotingDisk to new diskgroup. 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. 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. 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. You must shut down Oracle Clusterware on all nodes in the cluster to get a consistent snapshot using the ocrconfig -export command. Ensure that Oracle ASM disk groups that you create are mounted on all of the nodes in the cluster. Managing Oracle Cluster Registry and Voting Disks OCR and Voting To remove storage configurations no longer in use, run the following command as root: Run this command for every configured OCR. Healthy nodes will have a continuous network and disk heartbeats exchanged between the nodes. OCR and Voting Disk Voting files 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. 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. OCR It records the data where marks are made on the form. It does not require an advanced level recognition engine when compared to OCR. the OCR, VotingDisk and spfile to new In addition to mirroring OCR locations, you can also: Replace an OCR location if there is a misconfiguration or other type of OCR error, as described in the "Replacing an Oracle Cluster Registry Location" section. WebHello Friends,Here with one more topic on database administration guide. 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. Oracle Cluster Registry (OCR) which records cluster configuration information. In such cases, Oracle Database displays an alert message in either Oracle Enterprise Manager, the Oracle Clusterware alert log files, or both. 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). It records the data where marks are made on the form. col path for a30 With the Oracle Clusterware storage residing in an Oracle ASM disk group, you can manage both database and clusterware storage using Oracle Enterprise Manager. [root@NODE01 ~]# /u01/app/11.2.0.4/grid/bin/crsctl query css votedisk, 3. That is to say, as long as you have the latest OCR backup, you automatically have voting disk backup too. It contains manageability information about Oracle Clusterware, including dependencies between various services. (Both primary and mirrors) 2. You must run the command as a user with administrative privileges. Use the following command syntax as root on the restarted node where you use either a destination_file or +ASM_disk_group to indicate the current and target OCR locations: This operation only changes OCR on the node on which you run this command. List the Candidate Disk present for creating DISKGROUP. Each voting disk must be accessible by all nodes in the cluster for nodes to be members of the cluster. 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 You can run this command more than once if there is more than one OCR location configured. Hi, How the voting disk differ from the OCR. to Backup OCR and Voting Disk OMR technology scans a printed form and reads from predefined positions. Move the SPFILE to newdiskgroup. difference between OCR and voting disk Oracle Local Registry is OCRs local counterpart. If all voting disks are corrupted, however, you can restore them as described in "Restoring Voting Disks". Configure voting files on Oracle ASM or on shared storage. Restore Voting Disk Since we have restored OCR, we restored voting file as well. Ensure there is at least 280 MB of space on the mount partition. OCR stores configuration information in a series of key-value pairs in a tree structure. You cannot directly influence the number of voting disks in one disk group. 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. Oracle ASM on ScaleIO Best Practices - Dell Technologies 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. Optical Mark Reader (OMR) is the technology of electronically extracting data from marked fields such as checkboxes or bubbles from pre-printed forms. to Backup OCR and Voting Disk It is important to ensure that control files, redo log files, temp and undo reside exclusively in a pool with high performance. You can just replace with new voting file on disk group DATA.