An example of what you might define as a failure group would be a set of SCSI disks sharing the same SCSI controller. --add the new diskgroup with root user. It records the data where marks are made on the form. Ensure that Oracle ASM disk groups that you create are mounted on all of the nodes in the cluster. OCR and Voting WebOCR and Voting Disk. 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. To replace or move the location of an OCR device, 4. You must shut down Oracle Clusterware on all nodes in the cluster to get a consistent snapshot using the ocrconfig -export command. Network heartbeat is successful, but disk heartbeat is missed.2. Once you configure voting disks on Oracle ASM, you can only make changes to the voting disks' configuration using the crsctl replace votedisk command. OMR technology scans a printed form and reads from predefined positions. However, overriding the protection mechanism can result in the loss of data that was not available when the previous known good state was created. Break-in heartbeats indicate a possible error scenario. Voting files. Use the procedure in this section to add an OCR location. --With Spmove command we will move the spfile Managing Oracle Cluster Registry and Voting Disks Required fields are marked *. Both heartbeats failed. 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. The OLR only supports manual backups. 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. 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. 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. 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 following example shows how to migrate two OCRs to Oracle ASM using OCRCONFIG. In 10g, Oracle Clusterware can support 32 voting disks but in 11g R 2 supports 15 voting disks. Added on Sep 7 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. Voting Disk, should it be c)A node must be able to access more than half of the voting disks at any time. The ocrconfig -export and ocrconfig -import commands are compatible. Use ASMCA to create an Oracle ASM disk group that is at least the same size of the existing OCR and has at least normal redundancy. 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). If this problem is local to only one node, you can use other nodes to start your cluster database. c)A node must be able to access more than half of the voting disks at any time. Manage OLR using the OCRCHECK, OCRDUMP, and OCRCONFIG utilities as root with the -local option. In such cases, Oracle Database displays an alert message in either Oracle Enterprise Manager, the Oracle Clusterware alert log files, or both. CREATE DISKGROUP OCR_NEWDG NORMAL REDUNDANCY 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 stores information about the local node only, mainly related to the OHASd (as we will see below). If all voting disks are corrupted, however, you can restore them as described in "Restoring Voting Disks". Oracle recommends that you configure multiple voting disks during Oracle Clusterware installation to improve availability. Move the SPFILE to newdiskgroup. Healthy nodes will have continuous network & disk heartbeats exchanged between the nodes. Mirroring can help prevent OCR from becoming a single point of failure. The Oracle Clusterware installation process creates the voting disk and the OCR on a shared storage volume. 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. In 10g, Oracle Clusterware can support 32 voting disks but in 11g R 2 supports 15 voting disks. While marking their own presence, all the nodes also register the information about their communicability with other nodes in the voting disk. If you configure a mirrored OCR and if Oracle Clusterware cannot access the mirrored OCR locations and also cannot verify that the available OCR location contains the most recent configuration, then Oracle Clusterware prevents further modification to the available OCR location. Voting Disk Voting disk management requires a valid and working OCR. If you are upgrading OCR, then you can use the OCRCHECK utility to verify the integrity of OCR. 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. You can remove an OCR location to reduce OCR-related overhead or to stop mirroring your OCR because you moved OCR to redundant storage such as RAID. OCR and voting disk Oracle ASM on ScaleIO Best Practices - Dell Technologies CRS-4266: Voting file(s) successfully replaced, 9. This allows for the FRA diskgroup to be restored at a time slightly ahead of DATA, allowing Oracle to perform additional database recovery through the application of archivelogs. Note: In Shared storage you should create 3 minimum voting files in separate storage. It provides more accuracy as compared to OCR. In addition, with numerous nodes, there are other possible scenarios too. voting disk You cannot directly influence the number of voting disks in one disk group. 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. If one fails it doesnt cause an outage and the failed one can be replaced. 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. FAILGROUP fg03 DISK '/dev/oracleasm/disks/OCR_DISK13'; 6. 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. col name for a20 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 ASM manages voting disks differently from other files that it stores. This section describes how to back up OCR content and use it for recovery. 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. Modifying voting disks that are stored in Oracle ASM. CSSD processes (Cluster Services Synchronization Daemon) monitor the health of RAC nodes employing two distinct heartbeats: Network heartbeat and Disk heartbeat. [root@primary01 ~]# crsctl replace votedisk +DATA Successful addition of voting disk a6f4735a13a64f60bf31092700473fad. 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. 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. "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. 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. user13389425 Sep 7 2010 edited Sep 7 2010. Check the location of OCR Disk from GRID Home with root user. You must specify enough failure groups in each disk group to support the redundancy type for that disk group. It stands for Optical Character Reader or Optical Character Recognition. Thus heartbeat of various nodes is recorded at different offsets in the voting disk. To improve Oracle Clusterware storage manageability, OCR is configured, by default, to use Oracle ASM in Oracle Database 11g release 2 (11.2). For Oracle Clusterware 12c, please refer to Software Patch Level and 12c Grid Infrastructure OCR Backup/Restore. OLR is located on local storage on each node in a cluster. If the Oracle Restart home has been backed up, and if there is a failure, then restoring the Oracle Restart home restores OCR. The Oracle Clusterware installation process creates the voting disk and the OCR on a shared storage volume. This is called NETWORK HEARTBEAT. OCR is more commonly used than Voting Disk. List the Candidate Disk present for creating DISKGROUP. For eg, if you have 5 voting disks, a node must be able to access at least 3 of the voting disks. Jump to Answer. Configure voting files on Oracle ASM or on shared storage. (LogOut/ To add an OCRMIRROR device when only OCR device is defined: 3. The number of voting files you can store in a particular Oracle ASM disk group depends upon the redundancy of the disk group. Ensure that the Oracle ASM disk group that you specify exists and is mounted. You can use this command whether the voting disks were stored in Oracle ASM or some other storage device. Basic information about the resources, their location, permissions, current value, type, state, etc. For example, if any node that is part of your current Oracle RAC cluster is shut down, then you must update the OCR configuration on the stopped node to let that node rejoin the cluster after the node is restarted. Create the New Diskgroup in ASM for moving OCR, VotingDisk and SPFILE WebOracle RAC uses two storage locations, which can be accessed by all cluster members: The Oracle Cluster Registry (OCR) Contains information for managing the cluster The Voting Disk Contains information to determine which nodes are active members of the cluster at any given moment In Oracle RAC 10gRelease 2, these storage locations can Look at output from the ocrdump command and determine whether it has your latest updates. 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. Use the following procedure to import OCR on Linux or UNIX systems: Check whether crsd is running. ocrdump should be executed as root to display all the keys available. Voting Disk, should it be 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. Just one node is unhealthy. The destination of OCR file has been replaced. It was first used in 1914 to help blind people in reading. Failure groups are used to determine which Oracle ASM disks to use for storing redundant data. By using our site, you Hi, How the voting disk differ from the OCR. You cannot customize the backup frequencies or the number of files that Oracle Database retains. The ocrconfig -manualbackup and ocrconfig -restore commands are compatible. [grid@NODE01 ~]$ crsctl query css votedisk. It is used to process data from printed forms. [root@primary01 ~]# crsctl replace votedisk +DATA Successful addition of voting disk a6f4735a13a64f60bf31092700473fad. In this case, it is a little more difficult because:1. Alternatively, you can place OCR on Oracle ASM and allow it to create mirrors automatically, depending on the redundancy option you select. What is voting disks in RAC I am installing two node Oracle 11gR1 RAC on Solaris. By default, OLR is located at Grid_home/cdata/host_name.olr on each node. 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. You can have up to five OCR locations. For steps on this check the documentation: Oracle Database Oracle Clusterware and Oracle Real Application Clusters Administration and Deployment Guide. When exporting OCR, Oracle recommends including "ocr", the cluster name, and the timestamp in the name string. To display the voting disk FUID and file path of each current voting disk, run the crsctl query css votedisk command to display output similar to the following: This command returns a disk sequence number, the status of the disk, the FUID, the path of the disk, and the name of the Oracle ASM disk group on which the disk is stored. Each voting disk must be accessible by all nodes in the cluster for nodes to be members of the cluster. OCR and voting disk This post has been answered by user00726 on Sep 7 2010. Using the crsctl replace votedisk command, you can move a given set of voting disks from one Oracle ASM disk group into another, or onto a certified file system. By default, redo logs and control files are mirrored to both the DATA and FRA diskgroups. (Both primary and mirrors) 2. In 10g, Oracle Clusterware can support 32 voting disks but in 11g R 2 supports 15 voting disks. The heartbeat counter increments every second on every write call. For any work, queries and help. You should configure OCR in two independent disk groups. such as Oracle RAC databases, listeners, virtual IP addresses (VIPs), and services and any applications. Backups are created when the system is online. It was introduced in 11gR2, and is not shared by any other node in the cluster. Learn Oracle, PHP, HTML,CSS,Perl,UNIX shell scripts, March 19, 2017 by techgoeasy Leave a Comment. To downgrade, follow the downgrade instructions for each component and also downgrade OCR using the ocrconfig -downgrade command. RAC heartbeat is the polling mechanism that is sent over the cluster interconnect to ensure all RAC nodes are available. srvctl status diskgroup -g OCR_NEWDG 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. This chapter includes the following topics: Managing Oracle Cluster Registry and Oracle Local Registry. --Connect with SQLPLUS ASM instance There are a few different scenarios possible with missing heartbeats:1. 1. 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. What is NETWORK and DISK HEARTBEAT and how does it register in VOTING DISKS/FILES? The Oracle installation process for Oracle Clusterware gives you the option of automatically mirroring OCR. (LogOut/ on Oct 5 2010. 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. 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. It is useful in grading, calculating marks, etc. For OCRs not stored on Oracle ASM, Oracle recommends that you mirror OCR on different devices. Move the VotingDisk to new diskgroup. Optical Mark Reader (OMR) is the technology of electronically extracting data from marked fields such as checkboxes or bubbles from pre-printed forms. Failure groups define disks that share components, such that if one fails then other disks sharing the component might also fail. OCR is more commonly used than Voting Disk. You can inspect a backup using the OCRDUMP utility. Oracle Verify the VotingDisk movement on both nodes. Each node reads its KILL BLOCK once per second, if the kill block is not overwritten, the node commits suicide. An FRA diskgroup that holds archivelogs and backups. It is hard to implement as compared to OMR. 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. such as Oracle RAC databases, listeners, virtual IP addresses (VIPs), and services and any applications. It is the rapid method of data entry. Ocr Perform the following procedure to overwrite OCR if a node cannot start and if the alert log contains CLSD-1009 and CLSD-1011 messages. 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. Run the following command to inspect the contents and verify the integrity of the backup file: You can use any backup software to copy the automatically generated backup files at least once daily to a different device from where the primary OCR resides. such as Oracle RAC databases, listeners, virtual IP addresses (VIPs), and services and any applications. You cannot repair the OCR configuration on a node on which the Oracle Cluster Ready Services daemon is running. 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. Our storage is EMC SAN. Cloud Applications; Cloud Infrastructure; On-Premise Applications; E-Business Suite; By default, redo logs and control files are mirrored to both the DATA and FRA diskgroups. Make sure that xdpyinfo exist under PATH variable. Attempt to resolve the cause of the CLSD-1009 and CLSD-1011 messages. Its default location is in the path Grid_home/cdata/host_name.olr, where Grid_home is the Oracle Grid Infrastructure home, and host_name is the host name of the node. Cluster management is now affected on this particular node. Change), You are commenting using your Facebook account. 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. We and our partners share information on your use of this website to help improve your experience. 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. Generally, the following information is found in the OLR. 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 if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'techgoeasy_com-leader-1','ezslot_11',195,'0','0'])};__ez_fad_position('div-gpt-ad-techgoeasy_com-leader-1-0');2) In a shared storage system, we need to manually configure these files with a redundancy setup for high availability. Oracle Universal Installer for Oracle Clusterware 11g release 2 (11.2), does not support the use of raw or block devices. Please sign in to comment A high redundancy disk group must contain at least three failure groups. Hi all, What is the difference b/w OCR and Voting Disk. difference between OCR and voting disk