Move the VotingDisk to new diskgroup. I am installing two node Oracle 11gR1 RAC on Solaris. [grid@NODE01 ~]$ asmcmd spmove '+OCRVD_DG/RAC-cluster/asmparameterfile/registry.183.284573136' '+OCR_NEWDG/RAC-cluster/spfileASM.ora', --Verify The heartbeat counter increments every second on every write call. The following example shows how to migrate OCR from Oracle ASM to block devices using OCRCONFIG. 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. 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. It is the rapid method of data entry. For Oracle Clusterware 12c, please refer to Software Patch Level and 12c Grid Infrastructure OCR Backup/Restore. Voting files which record node membership information. The first method uses automatically generated OCR copies and the second method enables you to issue a backup command manually: Automatic backups: Oracle Clusterware automatically creates OCR backups every four hours. Just one node is unhealthy. Do this by using the ocrconfig -export command, which exports OCR content to a file format. Typically this is the work area and the recovery area. 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. It records the data where marks are made on the form. This section describes how to back up OCR content and use it for recovery. If OCR is not available or it is corrupt, then you must restore OCR as described in "Restoring Oracle Cluster Registry". -- Mount diskgroup You cannot directly influence the number of voting disks in one disk group. 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. 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. Recover OCR by running the ocrconfig -restore command, as instructed in the following procedure. OMR technology scans a printed form and reads from predefined positions. CRS-4266: Voting file(s) successfully replaced, 9. 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. How do you write a referee report for a job application? You cannot repair the OCR configuration on a node on which the Oracle Cluster Ready Services daemon is running. Oracle recommends that you configure multiple voting disks during Oracle Clusterware installation to improve availability. Alternatively, you can place OCR on Oracle ASM and allow it to create mirrors automatically, depending on the redundancy option you select. The written block has a header area with the node name. Cluster management is now affected on this particular node. Please sign in to comment When exporting OLR, Oracle recommends including "olr", the host name, and the timestamp in the name string. 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. 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. There are a few different scenarios possible with missing heartbeats:1. However, overriding the protection mechanism can result in the loss of data that was not available when the previous known good state was created. The Oracle Clusterware installation process creates the voting disk and the OCR on shared storage. OCR stores configuration information in a series of key-value pairs in a tree structure. Before you add, delete, replace, or restore voting disks, run the ocrcheck command as root. To restore an OCR when clusterware is down. 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. 1. Check the location of OCR Disk from GRID Home with root user. "OCRDUMP Utility Syntax and Options" for more information about the OCRDUMP utility, "Using the OCRCHECK Utility" for more information about the OCRCHECK utility. If we are not using a voting disk, then due to network failure, nodes are neither able to communicate with each other nor synchronize with the database, this situation is called a cluster SPLIT-BRAIN problem. 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. There is an API provided for this function (ocrconfig and crsctl), which is the appropriate interface Failure groups are used to determine which Oracle ASM disks to use for storing redundant data. 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. OCR has a mechanism that prevents data loss due to accidental overwrites. Both heartbeats failed. Learn how your comment data is processed. The Oracle Clusterware has the OCR and voting disks open and is actively using them. These backups are stored for a week and written in a round-robin fashion. 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. Voting files. 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. This chapter includes the following topics: Managing Oracle Cluster Registry and Oracle Local Registry. WebHello Friends,Here with one more topic on database administration guide. In a nutshell, OCR is used by CRSd and OLR by the OHASd. Voting files. The Oracle Clusterware has the OCR and voting disks open and is actively using them. "Administering Oracle Cluster Registry with Oracle Cluster Registry Export and Import Commands" to use manually created OCR export files to copy OCR content and use it for recovery. This is widely used for processing the large number of hand-filled forms which have to be processed quickly and with great accuracy. While marking their own presence, all the nodes also register the information about their communicability with other nodes in the voting disk. The Oracle Clusterware (Oracle Grid Infrastructure GI stack in 11gR2) uses OCR to manage resources and node membership information. It was introduced in 11gR2, and is not shared by any other node in the cluster. "OCRCONFIG Command Reference" for more information about OCRCONFIG commands. If all voting disks are corrupted, however, you can restore them as described in "Restoring Voting Disks". The text to speech can be used by them. 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. Successful addition of voting disk 34b3f9458e042b58eb8b601523fb6ef2. Attempt to correct the problem using the OCR restoration procedure for your platform. If the OCR mirror and OCR have been deleted, then it may be faster to restore the OCR using the OCR backups. The default location for generating backups on Linux or UNIX systems is Grid_home/cdata/cluster_name, where cluster_name is the name of your cluster. on Oct 5 2010. Voting disks/files are just like attendance registers where you have nodes mark their attendance (heartbeats). Our storage is EMC SAN. 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. If you cannot resolve the problem that caused the CLSD message, then run the command ocrconfig -overwrite to start the node. 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. Once an OCR location is created, it does not get updated in the Oracle Restart environment. Restore OCR with an OCR backup that you can identify in "Listing Backup Files" by running the following command as root: If you configured OCR in an Oracle ASM disk group, then ensure that the Oracle ASM disk group exists and is mounted. 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 must run the command as a user with administrative privileges. Oracle Local Registry is OCRs local counterpart. Verify the VotingDisk movement on both nodes. This post has been answered by user00726 on Sep 7 2010. Important Operation for Voting disks in RACa) To list currently configured voting diskif(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'techgoeasy_com-large-mobile-banner-1','ezslot_15',198,'0','0'])};__ez_fad_position('div-gpt-ad-techgoeasy_com-large-mobile-banner-1-0'); Run the following command as the root user to remove a voting disk: Run the following command to back up a voting disk. 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. Oracle Cluster Registry (OCR) which records cluster configuration information. WebOracle recommends just two diskgroups by default: A DATA diskgroup to hold all data, index, undo and temp files. You cannot inspect the contents of an export. 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 It also acts as a bootstrap for the Cluster Synchronization Services Daemon (CSSd) for port information, nodes and disks. Its application is in google books, bank statements, business documents etc. List the Candidate Disk present for creating DISKGROUP. It will also provide steps to move OCR / voting and ASM devices from raw device to block device. The Oracle Clusterware has the OCR and voting disks open and is actively using them. Successfully replaced voting disk group with +OCR_NEWDG. 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. where path like '/dev/oracleasm/disks/%' and header_status = 'CANDIDATE'; 5. such as Oracle RAC databases, listeners, virtual IP addresses (VIPs), and services and any applications. A failure group is a subset of the disks in a disk group. Will install binaries on local disk and use SAN for Voting disk, OCR and ASM. Voting Disk. 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. That is to say, as long as you have the latest OCR backup, you automatically have voting disk backup too. 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. 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 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. +OCRVD_DG/RAC-cluster/asmparameterfile/registry.183.284573136. Ensure that the Oracle ASM disk group you specify exists and is mounted. It stands for Optical Mark Reader or Optical Mark Recognition. user13389425 Sep 7 2010 edited Sep 7 2010. 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. Hi all, What is the difference b/w OCR and Voting Disk. For eg, if you have 5 voting disks, a node must be able to access at least 3 of the voting disks. To downgrade, follow the downgrade instructions for each component and also downgrade OCR using the ocrconfig -downgrade command. WebOracle recommends just two diskgroups by default: A DATA diskgroup to hold all data, index, undo and temp files. By default, OLR is located at Grid_home/cdata/host_name.olr on each node. Oracle High Availability Services uses this information. Cloud Applications; Cloud Infrastructure; On-Premise Applications; E-Business Suite; 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. Oracle recommends that you use the -manualbackup and -restore commands and not the -import and -export commands. Ensure there is at least 280 MB of space on the mount partition. You cannot add a voting disk to a cluster file system if the voting disks are stored in an Oracle ASM disk group. 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. 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. Added on Sep 7 Without the voting disk, its difficult to know, whether nodes are facing network problems or nodes are no longer available. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. The OLR only supports manual backups. The visually impaired people find it useful.
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difference between ocr and voting disk