Typically this is the work area and the recovery area. This command updates the OCR configuration on all of the nodes on which Oracle Clusterware is running. You must specify enough failure groups in each disk group to support the redundancy type for that disk group. Disk Group ocr_newdg is running on node01,node02, 8. 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. CSSD is a mutithreaded process.So it use various thread to monitor the heart beat. OMR technology scans a printed form and reads from predefined positions. Oracle strongly recommends that you mirror OCR if the underlying storage is not RAID. This section describes how to back up OCR content and use it for recovery. 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. Oracle recommends just two diskgroups by default: By default, redo logs and control files are mirrored to both the DATA and FRA diskgroups. [grid@NODE01 ~]$ asmcmd spmove '+OCRVD_DG/RAC-cluster/asmparameterfile/registry.183.284573136' '+OCR_NEWDG/RAC-cluster/spfileASM.ora', --Verify An example of what you might define as a failure group would be a set of SCSI disks sharing the same SCSI controller. This chapter includes the following topics: Managing Oracle Cluster Registry and Oracle Local Registry. 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. By default, redo logs and control files are mirrored to both the DATA and FRA diskgroups. Failure groups define disks that share components, such that if one fails then other disks sharing the component might also fail. 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. At least two OCR locations if OCR is configured on mirrored hardware or third-party mirrored volumes. 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. [root@NODE01 ~]# /u01/app/11.2.0.4/grid/bin/ocrconfig -add +OCR_NEWDG, --Verify the OCR is show in two diskgroup 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. In 10g, Oracle Clusterware can support 32 voting disks but in 11g R 2 supports 15 voting disks. 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. col header_status for a20 An FRA diskgroup that holds archivelogs and backups. Perform the following procedure as the root user to remove an OCR location from your Oracle Clusterware environment: Ensure that at least one OCR location other than the OCR location that you are removing is online. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. WebOCR and Voting Disk. 4) If the disk is not updated in a short timeout period, the node is considered unhealthy and maybe rebooted to protect the database. You cannot add a voting disk to a cluster file system if the voting disks are stored in an Oracle ASM disk group. Restore Voting Disk Since we have restored OCR, we restored voting file as well. Check the Voting Disk Location (Both primary and mirrors) 2. Important points about Voting disks in Oracle RAC. Helpful tips . OCR stores Oracle Clusterware and Oracle RAC database configuration information 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. If the crsd process running on the node affected by the Oracle ASM instance failure is the OCR writer, the majority of the OCR locations are stored in Oracle ASM, and you attempt I/O on OCR during the time the Oracle ASM instance is down on this node, then crsd stops and becomes inoperable. At least three OCR locations, if OCR is configured on non-mirrored or non-redundant storage. The text to speech can be used by them. Will install binaries on local disk and use SAN for Voting disk, OCR and ASM. This post has been answered by user00726 on Sep 7 2010. Helpful tips . Modifying voting disks that are stored in Oracle ASM. The file format generated by ocrconfig -restore is incompatible with the file format generated by ocrconfig -export. 1. You cannot customize the backup frequencies or the number of files that Oracle Database retains. user13389425 Sep 7 2010 edited Sep 7 2010. A-143, 9th Floor, Sovereign Corporate Tower, We use cookies to ensure you have the best browsing experience on our website. FAILGROUP fg02 DISK '/dev/oracleasm/disks/OCR_DISK12' To remove a voting disk, run the following command, specifying one or more space-delimited, voting disk FUIDs or comma-delimited directory paths to the voting disks you want to remove: After you start CSS in exclusive mode, you can replace the voting disk, as follows: To migrate voting disks to Oracle ASM, specify the Oracle ASM disk group name in the following command: After modifying the voting disk, verify the voting disk location, as follows: Scripting on this page enhances content navigation, but does not change the content in any way. 3. 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 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. Successful addition of voting disk 34b3f9458e042b58eb8b601523fb6ef2. b. 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. In Oracle Clusterware 11g release 2 (11.2), you no longer have to back up the voting disk. 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. 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. 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. Hope this sheds some light on what role OCR and OLR play in the Grid Infrastructure. Create the New Diskgroup in ASM for moving OCR, VotingDisk and SPFILE 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. The new OCR file, device, or disk group must be accessible from all of the active nodes in the cluster. While marking their own presence, all the nodes also register the information about their communicability with other nodes in the voting disk. Move the SPFILE to newdiskgroup. You cannot repair the OCR configuration on a node on which the Oracle Cluster Ready Services daemon is running. If the OCR mirror and OCR have been deleted, then it may be faster to restore the OCR using the OCR backups. Find the temp usage by sessions in Oracle. 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. Check the SPFILE location. ERROR: Unable to verify the graphical display setup. Ensure there is at least 280 MB of space on the mount partition. 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. Hi, How the voting disk differ from the OCR. However, each successive run must point to a different disk group. 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. Manage OLR using the OCRCHECK, OCRDUMP, and OCRCONFIG utilities as root with the -local option. --Connect with Grid User Successful deletion of voting disk 0e3a9c8e306a2befaf5548b77231be3a. Cluster management is now affected on this particular node. OCR stores configuration information in a series of key-value pairs in a tree structure. 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. My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts. 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. For example: Using the ocrconfig -export command also enables you to restore OCR using the -import option if your configuration changes cause errors. You can list backups with the ocrconfig -showbackup command, whereas you must keep track of all generated exports. 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. 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. 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. How do you write a referee report for a job application? Few possible scenarios:1. However, if you upgrade from a previous Oracle Clusterware release, then you can continue to use raw or block devices. 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. 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++. It is hard to implement as compared to OMR. 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. Please sign in to comment c)A node must be able to access more than half of the voting disks at any time. That is to say, as long as you have the latest OCR backup, you automatically have voting disk backup too. Jump to Answer. This section includes the following topics for managing voting disks in your cluster: Adding, Deleting, or Migrating Voting Disks. Voting disk management requires a valid and working OCR. 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. Cloud Applications; Cloud Infrastructure; On-Premise Applications; E-Business Suite; 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). Ensure that the Oracle ASM disk group that you specify exists and is mounted. 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. You can have up to five OCR locations. It records the data where marks are made on the form. I am installing two node Oracle 11gR1 RAC on Solaris. 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. With the Oracle Clusterware storage residing in an Oracle ASM disk group, you can manage both database and clusterware storage using Oracle Enterprise Manager. 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. (Both primary and mirrors)2. Successful addition of voting disk fa21c52bdf245d89acb2ae7bb245e193. Note: In Shared storage you should create 3 minimum voting files in separate storage. If you cannot resolve the problem that caused the CLSD message, then run the command ocrconfig -overwrite to start the node. Do this by using the ocrconfig -export command, which exports OCR content to a file format. If necessary, you can dynamically add or replace voting disks after you complete the Oracle Clusterware installation process without stopping the cluster. OMR technology scans a printed form and reads from predefined positions. The destination of OCR file has been replaced. OCR has a mechanism that prevents data loss due to accidental overwrites. The game features a fantasy space odyssey story with turn-based combat, and you can play it without spending a single cent on gacha. OCR also helps maintain the structure and dependencies that exist in the startup of various resources in the cluster. At this time VOTING DISK is used to communicate the node and trace information, which node is in the offline stage. If an OCR location suddenly becomes unavailable, then it might take a short period for Oracle Clusterware to show the change in status. You cannot use voting disks stored in Oracle ASM and voting disks not stored in Oracle ASM in the same cluster. It was first used in 1914 to help blind people in reading. Once you configure voting disks on Oracle ASM, you can only make changes to the voting disks' configuration using the crsctl replace votedisk command. 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. It is used to process data from printed forms.
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