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. Look at output from the ocrdump command and determine whether it has your latest updates. where path like '/dev/oracleasm/disks/%' and header_status = 'CANDIDATE'; 5. For any work, queries and help. If a resource fails, then before attempting to restore OCR, restart the resource. Create the New Diskgroup in ASM for moving OCR, VotingDisk and SPFILE Added on Sep 7 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. Network heartbeat is successful, but disk heartbeat is missed.2. 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. Oracle 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. Added on Sep 7 Restore Voting Disk Since we have restored OCR, we restored voting file as well. 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. --Connect with SQLPLUS ASM instance 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. This chapter includes the following topics: Managing Oracle Cluster Registry and Oracle Local Registry. 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. The heartbeat counter increments every second on every write call. 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. Ocr To view the contents of the OLR backup file: When you upgrade Oracle Clusterware, it automatically runs the ocrconfig -upgrade command. Modifying voting disks that are stored in Oracle ASM. OCR stores Oracle Clusterware and Oracle RAC database configuration information An FRA diskgroup that holds archivelogs and backups. Few possible scenarios:1. Successful addition of voting disk B6FF6C1D64B9837D82B1B41D38760445. OCR is what registry is for Windows. As shown in the image, there is a co-relation between Voting Disk, OCR and ASM Diskgroup such that during startup, CSS process reads the voting file and signals the CRSD to start. In this case, it is a little more difficult because:1. Without the voting disk, its difficult to know, whether nodes are facing network problems or nodes are no longer available. This site uses Akismet to reduce spam. This is true even in cases where there are no working voting disks. Ensure that the file you created is visible from all nodes in the cluster. 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. 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. You must specify enough failure groups in each disk group to support the redundancy type for that disk group. voting disk Make sure that xdpyinfo exist under PATH variable. to Restore OCR and Voting Disk At this time VOTING DISK is used to communicate the node and trace information, which node is in the offline stage. However, overriding the protection mechanism can result in the loss of data that was not available when the previous known good state was created. 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 is hard to implement as compared to OMR. Optical Mark Reader (OMR) is the technology of electronically extracting data from marked fields such as checkboxes or bubbles from pre-printed forms. In Oracle Clusterware 11g release 2 (11.2), you no longer have to back up the voting disk. 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. 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. I am installing two node Oracle 11gR1 RAC on Solaris. 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. As shown in the image, there is a co-relation between Voting Disk, OCR and ASM Diskgroup such that during startup, CSS process reads the voting file and signals the CRSD to start. CRS-4266: Voting file(s) successfully replaced, 9. These backups are stored for a week and written in a round-robin fashion. Please sign in to comment 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. 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. Attempt to resolve the cause of the CLSD-1009 and CLSD-1011 messages. Nodes with quorum will maintain active membership of the cluster and other nodes (s) will be fenced/rebooted. 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. An FRA diskgroup that holds archivelogs and 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). The two file formats are incompatible and must not be interchangeably used. There is an API provided for this function (ocrconfig and crsctl), which is the appropriate interface As a definitive verification that OCR failed, run ocrcheck and if the command returns a failure message, then both the primary OCR and the OCR mirror have failed. In addition, with numerous nodes, there are other possible scenarios too. The OCR file is automatically backed up locally in $ORA_CRS_HOME/cdata/ every four hours (note timestamp of backup*.ocr files below). 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. 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. Each voting disk must be accessible by all nodes in the cluster for nodes to be members of the cluster. Use the following procedure to import OCR on Linux or UNIX systems: Check whether crsd is running. 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. The OLR only supports manual backups. The visually impaired people find it useful. Is it illegal to lie about a felony on an application? An advanced recognition engine is needed for OCR compared to OMR. To improve Oracle Clusterware storage manageability, OCR is configured, by default, to use Oracle ASM in Oracle Database 11g release 2 (11.2). OMR technology scans a printed form and reads from predefined positions. Each successive run of this command must point to a different file location. Since Oracle Database 11gR2 it is recommended to store the OCR and Voting Files in a standalone ASM diskgroup, as shown in Table 3. 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. 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. 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. The ocrconfig -manualbackup and ocrconfig -restore commands are compatible. 2) CSSD process on every node makes entries in the voting disk to ascertain the membership of the node. The file format generated by ocrconfig -restore is incompatible with the file format generated by ocrconfig -export. c)A node must be able to access more than half of the voting disks at any time. However, if you upgrade from a previous Oracle Clusterware release, then you can continue to use raw or block devices. It is useful in grading, calculating marks, etc. When using ScaleIO snapshots, it can be beneficial to snapshot the DATA and FRA diskgroups independently. WebOracle recommends just two diskgroups by default: A DATA diskgroup to hold all data, index, undo and temp files. Optical Mark Reader (OMR) is the technology of electronically extracting data from marked fields such as checkboxes or bubbles from pre-printed forms. WebHello Friends,Here with one more topic on database administration guide. 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. For example: Using the ocrconfig -export command also enables you to restore OCR using the -import option if your configuration changes cause errors. Cloud Applications; Cloud Infrastructure; On-Premise Applications; E-Business Suite; Oracle Cluster Registry (OCR) which records cluster configuration information. Alternatively, you can place OCR on Oracle ASM and allow it to create mirrors automatically, depending on the redundancy option you select. 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. 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. By default, OLR is located at Grid_home/cdata/host_name.olr on each node. 2. 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 It also acts as a bootstrap for the Cluster Synchronization Services Daemon (CSSd) for port information, nodes and disks. (LogOut/ 10. Once you configure voting disks on Oracle ASM, you can only make changes to the voting disks' configuration using the crsctl replace votedisk command. Your email address will not be published. The Windows default location for generating backups uses the same path structure. Basic information about the resources, their location, permissions, current value, type, state, etc. Hi, I am working in IT industry with having more than 10 year of experience, worked as an Oracle DBA with a Company and handling different databases like Oracle, SQL Server , DB2 etc 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. To display the voting disk FUID and file path of each current voting disk, run the crsctl query css votedisk command to display output similar to the following: This command returns a disk sequence number, the status of the disk, the FUID, the path of the disk, and the name of the Oracle ASM disk group on which the disk is stored. Restore Voting Disk Since we have restored OCR, we restored voting file as well. OCR The Oracle installation process for Oracle Clusterware gives you the option of automatically mirroring OCR. However, if you upgrade from a previous version of Oracle Clusterware, you can migrate OCR to reside on Oracle ASM, and take advantage of the improvements in managing Oracle Clusterware storage. Nytro.ai uses technology that works best in other browsers. If you are upgrading OCR, then you can use the OCRCHECK utility to verify the integrity of OCR. Jump to Answer. Healthy nodes will have continuous network & disk heartbeats exchanged between the nodes. the OCR, VotingDisk and spfile to new Cloud Applications; Cloud Infrastructure; On-Premise Applications; E-Business Suite; such as Oracle RAC databases, listeners, virtual IP addresses (VIPs), and services and any applications. 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. 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. Attempt to correct the problem using the OCR restoration procedure for your platform. At least two OCR locations if OCR is configured on an Oracle ASM disk group. 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. Each node reads its KILL BLOCK once per second, if the kill block is not overwritten, the node commits suicide. If the original OCR location does not exist, then you must create an empty (0 byte) OCR location before you run the ocrconfig -import command. For example, if you ran the ocrconfig -restore command on node 1 of a four-node cluster, then you must run the ocrconfig -repair -replace command on nodes 2, 3, and 4. Oracle ASM manages voting disks differently from other files that it stores. Successful deletion of voting disk 8b62c257e7fa2bfabf363cb4791c1f4c. In 10g, Oracle Clusterware can support 32 voting disks but in 11g R 2 supports 15 voting disks. Voting Disk. Oracle Clusterware can manage up to five redundant OCR locations. What is NETWORK and DISK HEARTBEAT and how does it register in VOTING DISKS/FILES? What is voting disks in RAC Will install binaries on local disk and use SAN for Voting disk, OCR and ASM. Voting files For a full experience use one of the browsers below. (Both primary and mirrors)2. CREATE DISKGROUP OCR_NEWDG NORMAL REDUNDANCY Ensure that the OCR devices that you specify in the OCR configuration exist and that these OCR devices are valid. Oracle Automatic Storage Management Administrator's Guide for more information about disk group redundancy and quorum failure groups, "Adding, Deleting, or Migrating Voting Disks" for information about migrating voting disks. It shares the same layout or structure as the OCR. OCR and Voting Disk Hope this sheds some light on what role OCR and OLR play in the Grid Infrastructure. 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. It was first used in 1914 to help blind people in reading. 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. If OCR is not available or it is corrupt, then you must restore OCR as described in "Restoring Oracle Cluster Registry". 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 location of OLR can be found in /etc/oracle/olr.loc. Start the Oracle Clusterware stack on one node in exclusive mode by running the following command as root: The -nocrs option ensures that the crsd process and OCR do not start with the rest of the Oracle Clusterware stack. Worked as a Development and Database Administrator. My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts. Use the following procedure to import OCR on Windows systems: Check whether crsd is running. Managing Oracle Cluster Registry and Voting Disks Voting Disk. It contains key value pairs of various resources in the cluster. If the Oracle Restart home has been backed up, and if there is a failure, then restoring the Oracle Restart home restores OCR. It contains the following information shared across the nodes in the cluster. 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