difference between ocr and voting disk

Oracle ASM on ScaleIO Best Practices - Dell Technologies FAILGROUP fg01 DISK '/dev/oracleasm/disks/OCR_DISK11' Its application is in google books, bank statements, business documents etc. Ocr Use the following procedure to import OCR on Linux or UNIX systems: Check whether crsd is running. the OCR, VotingDisk and spfile to new Once you configure voting disks on Oracle ASM, you can only make changes to the voting disks' configuration using the crsctl replace votedisk command. b. WebHello Friends,Here with one more topic on database administration guide. Ensure that the most recent OCR contains the latest OCR updates. At this time VOTING DISK is used to communicate the node and trace information, which node is in the offline stage. This process is called DISK HEARTBEAT. When using a mix of storage pools with both high capacity spinning disks and high performance solid state devices additional diskgroups should be considered, which correspond to the different performance storage pools. OCR and Voting Is it illegal to lie about a felony on an application? 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 c)A node must be able to access more than half of the voting disks at any time. You must instead use the -restore option, as described in the following sections. In 10g, Oracle Clusterware can support 32 voting disks but in 11g R 2 supports 15 voting disks. on Oct 5 2010. "OCRDUMP Utility Syntax and Options" for more information about the OCRDUMP utility, "Using the OCRCHECK Utility" for more information about the OCRCHECK utility. 1. OCR is used in a variety of applications, such as scanning documents and recognizing text in images. In addition to using the automatically created OCR backup files, you should also export OCR contents before and after making significant configuration changes, such as adding or deleting nodes from your environment, modifying Oracle Clusterware resources, and upgrading, downgrading or creating a database. The Oracle Clusterware installation process creates the voting disk and the OCR on a shared storage volume. Successful deletion of voting disk 8b62c257e7fa2bfabf363cb4791c1f4c. 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. OLR is a registry similar to OCR located on each node in a cluster, but contains information specific to each node. 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. Comments. 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. 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. At any one time, Oracle Database always retains the last three backup copies of OCR. For steps on this check the documentation: Oracle Database Oracle Clusterware and Oracle Real Application Clusters Administration and Deployment Guide. The Oracle installation process for Oracle Clusterware gives you the option of automatically mirroring OCR. Our storage is EMC SAN. In addition, with numerous nodes, there are other possible scenarios too. Its primary purpose is to help in a situation where the private network communication fails.CSS (Cluster Synchronization Service) is the service that determines which nodes in the cluster are available via communication through a dedicated private network and with a voting disk used as a secondary communication mechanism. Verify the VotingDisk movement on both nodes. This is called NETWORK HEARTBEAT. You cannot repair the OCR configuration on a node on which the Oracle Cluster Ready Services daemon is running. WebHello Friends,Here with one more topic on database administration guide. When you repair OCR on a stopped node using ocrconfig -repair, you must provide the same OCR file name (which should be case-sensitive) as the OCR file names on other nodes. 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. If it is, stop it by running the following command as a member of the Administrators group: Import OCR by running the following command as a member of the Administrators group: In Oracle Clusterware 11g release 2 (11.2), each node in a cluster has a local registry for node-specific resources, called an Oracle Local Registry (OLR), that is installed and configured when Oracle Clusterware installs OCR. For any work, queries and help. Voting Disk It stands for Optical Mark Reader or Optical Mark Recognition. For a full experience use one of the browsers below. 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. You cannot add a voting disk to a cluster file system if the voting disks are stored in an Oracle ASM disk group. 1. By default, Oracle ASM puts each voting disk in its own failure group within the disk group. 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. Our storage is EMC SAN. The procedure described in the following list enables you to start the cluster using the available OCR location. 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. It contains key value pairs of various resources in the cluster. This section includes the following topics for managing voting disks in your cluster: Adding, Deleting, or Migrating Voting Disks. 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. The heartbeat counter increments every second on every write call. Oracle recommends that you do not use more than five voting files, Following are the steps to move OCR, Voting Disk and Spfile to new disk group. 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. If you upgrade from a previous version of Oracle Clusterware to Oracle Clusterware 11g release 2 (11.2) and you want to store voting disks in an Oracle ASM disk group, then you must set the ASM Compatibility (COMPATIBLE.ASM) compatibility attribute to 11.2.0.0. Use the following procedure to import OCR on Windows systems: Check whether crsd is running. +OCR_NEWDG/RAC-cluster/spfileASM.ora. 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. 1. SQL> show parameter spfile, [grid@RAC1 ~]$ asmcmd spget 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. difference between OCR and voting disk What is voting disks in RAC Will install binaries on local disk and use SAN for Voting disk, OCR and ASM. such as Oracle RAC databases, listeners, virtual IP addresses (VIPs), and services and any applications. 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. Do this by using the ocrconfig -export command, which exports OCR content to a file format. An FRA diskgroup that holds archivelogs and backups. Typically this is the work area and the recovery area. 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. Worked as a Development and Database Administrator. 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). Majority of the keys in the OCRDUMPFILE deal with the CRSd. For example: The default backup location for the OLR is in the path Grid_home/cdata/host_name. 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. Hi, How the voting disk differ from the OCR. Break-in heartbeat indicates a possible error scenario. Both heartbeats failed. Recover the Oracle voting disk when its Oracle recommends that you configure multiple voting disks during Oracle Clusterware installation to improve availability. Importing Oracle Cluster Registry Content on Linux or UNIX Systems, Importing Oracle Cluster Registry Content on Windows Systems. Is it illegal to lie about a felony on an application? to Backup OCR and Voting Disk It is useful in grading, calculating marks, etc. Voting files which record node membership information. However, Oracle recommends using several failure groups. This section describes how to back up OCR content and use it for recovery. The number of voting files you can store in a particular Oracle ASM disk group depends upon the redundancy of the disk group. If you cannot mount the disk group locally, then run the following SQL*Plus command: Optionally, if you want to restore OCR to a raw device, then you must run the ocrconfig -repair -replace command as root, assuming that you have all the necessary permissions on all nodes to do so and that OCR was not previously on Oracle ASM. 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 Move the SPFILE to newdiskgroup. 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. Oracle strongly recommends that you mirror OCR if the underlying storage is not RAID. Your email address will not be published. to Restore OCR and Voting Disk The following example shows how to migrate two OCRs to Oracle ASM using OCRCONFIG. Multiple processes on each node have simultaneous read and write access to the OLR particular to the node on which they reside, regardless of whether Oracle Clusterware is running or fully functional. There is an API provided for this function (ocrconfig and crsctl), which is the appropriate interface than typical cp and/or dd commands.It is highly recommended to take a backup of the voting disk, and OCR device before making any changes. 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. OCR and Voting Disk -- Mount diskgroup Will install binaries on local disk and use SAN for Voting disk, OCR and ASM. 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. For eg, if you have 5 voting disks, a node must be able to access at least 3 of the voting disks. 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 does not support having voting disks in Oracle ASM and directly on a cluster file system for the same cluster at the same time.

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