The ocrconfig -replace command requires that at least two OCR locations are configured. If one fails it doesnt cause an outage and the failed one can be replaced. 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 you cannot resolve the problem that caused the CLSD message, then run the command ocrconfig -overwrite to start the node.
the OCR, VotingDisk and spfile to new Oracle Clusterware can manage up to five redundant 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. Please sign in to comment It was first used in 1914 to help blind people in reading. 10. -- Mount diskgroup Voting files. Check the Voting Disk Location Oracle Cluster Registry (OCR) which records cluster configuration information. In 10g, Oracle Clusterware can support 32 voting disks but in 11g R 2 supports 15 voting disks. In this case, it is a little more difficult because:1. This section describes how to administer OCR in the following topics: Migrating Oracle Cluster Registry to Oracle Automatic Storage Management, Adding, Replacing, Repairing, and Removing Oracle Cluster Registry Locations, Diagnosing Oracle Cluster Registry Problems, Administering Oracle Cluster Registry with Oracle Cluster Registry Export and Import Commands, Upgrading and Downgrading the Oracle Cluster Registry Configuration. on Oct 5 2010. 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. Required fields are marked *. CSS service is sending heartbeat messages through the network and voting disk.In a situation, when due to private network failure, nodes are not able to synchronize I/O to the shared disks, Therefore some of the nodes will be going to the offline stage. a) We must have an odd number of disks.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'techgoeasy_com-large-leaderboard-2','ezslot_13',194,'0','0'])};__ez_fad_position('div-gpt-ad-techgoeasy_com-large-leaderboard-2-0'); b)Oracle recommends a minimum of 3 and a maximum of 5. Ensure that the OCR devices that you specify in the OCR configuration exist and that these OCR devices are valid. Look at output from the ocrdump command and determine whether it has your latest updates. 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. 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.
the OCR, VotingDisk and spfile to new If you choose to store your voting disks in Oracle ASM, then Oracle ASM stores all the voting disks for the cluster in the disk group you choose. 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. 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. 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. 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. Our storage is EMC SAN. You can inspect a backup using the OCRDUMP utility. Successful deletion of voting disk da722ae356dd2e3ee871601add127e3c. Oracle recommends just two diskgroups by default: By default, redo logs and control files are mirrored to both the DATA and FRA diskgroups. 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. It shares the same layout or structure as the OCR. A-143, 9th Floor, Sovereign Corporate Tower, We use cookies to ensure you have the best browsing experience on our website. 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. Oracle recommends that you use the -manualbackup and -restore commands and not the -import and -export commands. Check the location of OCR Disk from GRID Home with root user. Voting Disk. It stores information about the local node only, mainly related to the OHASd (as we will see below). To improve Oracle Clusterware storage manageability, OCR is configured, by default, to use Oracle ASM in Oracle Database 11g release 2 (11.2). Perform the following procedure to overwrite OCR if a node cannot start and if the alert log contains CLSD-1009 and CLSD-1011 messages. For Oracle Clusterware 12c, please refer to
Software Patch Level and 12c Grid Infrastructure OCR Backup/Restore. Learn Oracle, PHP, HTML,CSS,Perl,UNIX shell scripts, March 19, 2017 by techgoeasy Leave a Comment. The file format generated by ocrconfig -restore is incompatible with the file format generated by ocrconfig -export. To add an OCRMIRROR device when only OCR device is defined: 3. There is an API provided for this function (ocrconfig and crsctl), which is the appropriate interface You should configure OCR in two independent disk groups. However, overriding the protection mechanism can result in the loss of data that was not available when the previous known good state was created. (Both primary and mirrors)2. 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. You must create an empty (0 byte) OCR location, or the Oracle ASM disk group must exist and be mounted. Learn how your comment data is processed. OCR stores Oracle Clusterware and Oracle RAC database configuration information You must shut down Oracle Clusterware on all nodes in the cluster to get a consistent snapshot using the ocrconfig -export command. Oracle Clusterware uses voting files to determine which nodes are members of a 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. 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 can find the location of the OCRFILE using one of the tow methods below. Oracle Cluster Registry (OCR) which records cluster configuration information. Nodes with quorum will maintain active membership of the cluster and other nodes (s) will be fenced/rebooted. This process is called DISK HEARTBEAT. It contains the following information shared across the nodes in the cluster. It stands for Optical Mark Reader or Optical Mark Recognition. This post has been answered by user00726 on Sep 7 2010. --With Spmove command we will move the spfile Hi, How the voting disk differ from the OCR. 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. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()); if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'techgoeasy_com-large-billboard-2','ezslot_4',129,'0','0'])};__ez_fad_position('div-gpt-ad-techgoeasy_com-large-billboard-2-0');if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'techgoeasy_com-large-billboard-2','ezslot_5',129,'0','1'])};__ez_fad_position('div-gpt-ad-techgoeasy_com-large-billboard-2-0_1');if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'techgoeasy_com-large-billboard-2','ezslot_6',129,'0','2'])};__ez_fad_position('div-gpt-ad-techgoeasy_com-large-billboard-2-0_2');if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'techgoeasy_com-large-billboard-2','ezslot_7',129,'0','3'])};__ez_fad_position('div-gpt-ad-techgoeasy_com-large-billboard-2-0_3');.large-billboard-2-multi-129{border:none!important;display:block!important;float:none!important;line-height:0;margin-bottom:2px!important;margin-left:auto!important;margin-right:auto!important;margin-top:2px!important;max-width:100%!important;min-height:250px;min-width:300px;padding:0;text-align:center!important}, Enter your email address to subscribe to this blog and receive notifications of new posts by email. Successfully replaced voting disk group with +OCR_NEWDG. To replace or move the location of an OCR device, 4. 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. 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. Ensure that the file you created is visible from all nodes in the cluster. 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. Oracle Cluster Registry (OCR) which records cluster configuration information. 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. Restore Voting Disk Since we have restored OCR, we restored voting file as well. OCR is more commonly used than Voting Disk. It is located on the shared cluster system or a shared raw device file or Oracle ASM(11gr2 onwards) . OCR and voting disk Is it illegal to lie about a felony on an application? There is an API provided for this function (ocrconfig and crsctl), which is the appropriate interface By default, Oracle ASM puts each voting disk in its own failure group within the disk group. Network heartbeat is successful, but disk heartbeat is missed.2. FAILGROUP fg02 DISK '/dev/oracleasm/disks/OCR_DISK12' 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. It is important to ensure that control files, redo log files, temp and undo reside exclusively in a pool with high performance. 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. Mount and check status Diskgroup in all Nodes You must instead use the -restore option, as described in the following sections. Voting Disk. Change), You are commenting using your Facebook account. Its application is in surveys, answer sheets, questionnaires and ballots. RAC heartbeat is the polling mechanism that is sent over the cluster interconnect to ensure all RAC nodes are available. Is it illegal to lie about a felony on an application? Ocr You can check the status of OLR on the local node using the OCRCHECK utility, as follows: You can display the content of OLR on the local node to the text terminal that initiated the program using the OCRDUMP utility, as follows: You can perform administrative tasks on OLR on the local node using the OCRCONFIG utility. OLR is located on local storage on each node in a cluster. These files can be stored either in ASM or in shared storage. 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. To view the contents of the OLR backup file: When you upgrade Oracle Clusterware, it automatically runs the ocrconfig -upgrade command. user13389425 Sep 7 2010 edited Sep 7 2010. Managing Oracle Cluster Registry and Voting Disks Please do provide the feedback, Related ArticlesWhat is Oracle Clusterware?How to Recreate Central Inventory in Real Applications ClustersHow to add any node to Oracle RAC cluster in 10g and 11gHow to setup diag wait in clusterCluster command in Oracle clusterware 10g and 11gOracle Flex Cluster 12c, Filed Under: Oracle, Oracle Database Tagged With: voting disks, Your email address will not be published. It provides more accuracy as compared to OCR. 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. 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. Create the New Diskgroup in ASM for moving OCR, VotingDisk and SPFILE That is to say, as long as you have the latest OCR backup, you automatically have voting disk backup too. Oracle recommends that you use Oracle ASM to store OCR and voting disks. 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. By default, OLR is located at Grid_home/cdata/host_name.olr on each node. on Oct 5 2010. The ocrconfig -export and ocrconfig -import commands are compatible. A small number of failure groups, or failure groups of uneven capacity, can create allocation problems that prevent full use of all of the available storage. External redundancy: A disk group with external redundancy can store only one voting disk, Normal redundancy: A disk group with normal redundancy stores three voting disks, High redundancy: A disk group with high redundancy stores five voting disks. Your biggest Honkai: Star Rail questions, answered Ensure that the most recent OCR contains the latest OCR updates. The Windows default location for generating backups uses the same path structure. Hi all, What is the difference b/w OCR and Voting Disk. 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 Oracle Clusterware installation process creates the voting disk and the OCR on a shared storage volume. Oracle 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 disks. If necessary, you can dynamically add or replace voting disks after you complete the Oracle Clusterware installation process without stopping the cluster. OCR is used in a variety of applications, such as scanning documents and recognizing text in images. Learn how your comment data is processed. You can have up to five OCR locations. It is the rapid method of data entry. 3. WebOCR and Voting Disk. OCR is what registry is for Windows. SQL> show parameter spfile, [grid@RAC1 ~]$ asmcmd spget "OCRDUMP Utility Syntax and Options" for more information about the OCRDUMP utility, "Using the OCRCHECK Utility" for more information about the OCRCHECK utility. OLR is a registry similar to OCR located on each node in a cluster, but contains information specific to each node. A normal redundancy disk group must contain at least two failure groups but if you are storing your voting disks on Oracle ASM, then a normal redundancy disk group must contain at least three failure groups. 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. The new OCR file, device, or disk group must be accessible from all of the active nodes in the cluster. Managing Oracle Cluster Registry and Voting Disks 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. The procedure described in the following list enables you to start the cluster using the available OCR location. This site uses Akismet to reduce spam. It records the data where marks are made on the form. 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. For example: Using the ocrconfig -export command also enables you to restore OCR using the -import option if your configuration changes cause errors. It does not require an advanced level recognition engine when compared to OCR. WebThe voting disk is a file that manages information about node membership, and the OCR is a file that manages cluster and Oracle RAC database configuration information. You cannot restore your configuration from an OCR backup file using the -import option, which is explained in "Administering Oracle Cluster Registry with Oracle Cluster Registry Export and Import Commands". Move the SPFILE to newdiskgroup. 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