It will also provide steps to move OCR / voting and ASM devices from raw device to block device. There is an API provided for this function (ocrconfig and crsctl), which is the appropriate interface (LogOut/ When using ScaleIO snapshots, it can be beneficial to snapshot the DATA and FRA diskgroups independently. How do you write a referee report for a job application? If you are storing OCR on an Oracle ASM disk group, and that disk group is corrupt, then you must restore the Oracle ASM disk group using Oracle ASM utilities, and then mount the disk group again before recovering OCR. The Oracle Clusterware installation process creates the voting disk and the OCR on shared storage. Learn how your comment data is processed. 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. That is to say, as long as you have the latest OCR backup, you automatically have voting disk backup too. 4. Oracle Cluster Registry (OCR) which records cluster configuration information. You can have up to five OCR locations. "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. You can list backups with the ocrconfig -showbackup command, whereas you must keep track of all generated exports. Cluster management is now affected on this particular node. It provides more accuracy as compared to OCR. Managing Oracle Cluster Registry and Voting Disks 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. If you run the ocrconfig -add | -repair | -replace command, then the device, file, or Oracle ASM disk group that you are adding must be accessible. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. Ensure that the file you created is visible from all nodes in the cluster. SQL> show parameter spfile, [grid@RAC1 ~]$ asmcmd spget 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. Generally, the following information is found in the OLR. (Both primary and mirrors)2. If the OCR mirror and OCR have been deleted, then it may be faster to restore the OCR using the OCR backups. You cannot inspect the contents of an export. By default, redo logs and control files are mirrored to both the DATA and FRA diskgroups. Ensure that the Oracle ASM disk group you specify exists and is mounted. Alternatively, you can place OCR on Oracle ASM and allow it to create mirrors automatically, depending on the redundancy option you select. Nytro.ai uses technology that works best in other browsers. If all voting disks are corrupted, however, you can restore them as described in "Restoring Voting Disks". 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. such as Oracle RAC databases, listeners, virtual IP addresses (VIPs), and services and any applications. Oracle Cluster Registry (OCR) and Oracle Local Registry (OLR) are two very important components of a Grid Infrastructure that help manage the clusterresources. However, each successive run must point to a different disk group. The location of OLR can be found in /etc/oracle/olr.loc. OCR Hi all, What is the difference b/w OCR and Voting Disk. Voting files. 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. In addition, the process prevents overwriting by prohibiting Oracle Clusterware from starting on the node on which only one OCR is available. 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. [root@NODE01 ~]# /u01/app/11.2.0.4/grid/bin/ocrcheck, --Delete the old diskgroup 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. 3) CSSD process in each RAC maintains the heartbeat in a block of size 1 OS block in the hot block of the voting disk at a specific offset. 10. 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. Oracle Clusterware uses voting files to determine which nodes are members of a This section describes how to back up OCR content and use it for recovery. What is voting disks in RAC 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. The two file formats are incompatible and must not be interchangeably used. Note: In Shared storage you should create 3 minimum voting files in separate storage. Helpful tips . Oracle High Availability Services uses this information. Comments. It is useful in grading, calculating marks, etc. 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. 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. Its application is in google books, bank statements, business documents etc. Ensure that the Oracle ASM disk group that you specify exists and is mounted. OMR technology scans a printed form and reads from predefined positions. 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. ERROR: Unable to verify the graphical display setup. OCR Check the SPFILE location. 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. 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. To add an OCRMIRROR device when only OCR device is defined: 3. Typically, one would simply cp or dd the files once the new storage has been presented to the hosts. select path,name,header_status from v$asm_disk It maintains and consists of important details about the cluster nodes membership, such as which node is part of the cluster, who (node) is joining the cluster, and who (node) is leaving the cluster. The following example shows how to migrate OCR from Oracle ASM to block devices using OCRCONFIG. OCR and Voting To remove storage configurations no longer in use, run the following command as root: Run this command for every configured OCR. If you configure a single voting disk, then you should use external mirroring to provide redundancy. This section includes the following topics: Adding an Oracle Cluster Registry Location, Removing an Oracle Cluster Registry Location, Replacing an Oracle Cluster Registry Location, Repairing an Oracle Cluster Registry Configuration on a Local Node, Overriding the Oracle Cluster Registry Data Loss Protection Mechanism. Repairing an OCR involves either adding, deleting, or replacing an OCR location. If OCR is stored in an Oracle ASM disk group with external redundancy, then Oracle recommends that you add another OCR location to another disk group to avoid the loss of OCR, if a disk fails in the disk group. Optical Character Reader (OCR) is used to convert different types of documents such as scanned paper documents, PDF files or images captured by a digital camera into machine-encoded text. [grid@NODE01 ~]$ asmcmd spmove '+OCRVD_DG/RAC-cluster/asmparameterfile/registry.183.284573136' '+OCR_NEWDG/RAC-cluster/spfileASM.ora', --Verify 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. to Restore OCR and Voting Disk If the configurations do not match, run ocrconfig -repair. It was introduced in 11gR2, and is not shared by any other node in the cluster. For example: The default backup location for the OLR is in the path Grid_home/cdata/host_name. Since Oracle Database 11gR2 it is recommended to store the OCR and Voting Files in a standalone ASM diskgroup, as shown in Table 3. List the Candidate Disk present for creating DISKGROUP. There is an API provided for this function (ocrconfig and crsctl), which is the appropriate interface 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. FAILGROUP fg01 DISK '/dev/oracleasm/disks/OCR_DISK11' 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. For steps on this check the documentation: Oracle Database Oracle Clusterware and Oracle Real Application Clusters Administration and Deployment Guide. OCR stores configuration information in a series of key-value pairs in a tree structure. 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. OCR stores Oracle Clusterware and Oracle RAC database configuration information The OLR only supports manual backups. Oracle Universal Installer for Oracle Clusterware 11g release 2 (11.2), does not support the use of raw or block devices. Jump to Answer. Oracle ASM on ScaleIO Best Practices - Dell Technologies Voting Disk, should it be Static data: Info about nodes in 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 the OCR, VotingDisk and spfile to new Recover the Oracle voting disk when its Voting files which record node membership information. You cannot repair the OCR configuration on a node on which the Oracle Cluster Ready Services daemon is running. It is used in scanning and converting different types of documents. To add a new disk and remove the existing disk, run the following command, replacing the path_to_voting_diskB variable with the fully qualified path name of voting disk B: The -purge option deletes existing voting disks. 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. 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.

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