Hi, How the voting disk differ from the OCR. For eg, if you have 5 voting disks, a node must be able to access at least 3 of the voting disks. Verify the VotingDisk movement on both nodes. 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. 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. It contains the following information shared across the nodes in the cluster. 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. such as Oracle RAC databases, listeners, virtual IP addresses (VIPs), and services and any applications. Hope this sheds some light on what role OCR and OLR play in the Grid Infrastructure. This command updates the OCR configuration on all of the nodes on which Oracle Clusterware is running. 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. CSSD is a mutithreaded process.So it use various thread to monitor the heart beat. The Oracle Clusterware (Oracle Grid Infrastructure GI stack in 11gR2) uses OCR to manage resources and node membership information. 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. Check the SPFILE location. Will install binaries on local disk and use SAN for Voting disk, OCR and ASM. The OLR and GPnP profile are required to start the HA service stack. You must shut down Oracle Clusterware on all nodes in the cluster to get a consistent snapshot using the ocrconfig -export command. An FRA diskgroup that holds archivelogs and backups. 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. If necessary, you can dynamically add or replace voting disks after you complete the Oracle Clusterware installation process without stopping the cluster. 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. However, if you upgrade from a previous Oracle Clusterware release, then you can continue to use raw or block devices. You can find the location of the OCRFILE using one of the tow methods below. Nodes with quorum will maintain active membership of the cluster and other nodes (s) will be fenced/rebooted. Look at output from the ocrdump command and determine whether it has your latest updates. --Connect with Grid User Do this by using the ocrconfig -export command, which exports OCR content to a file format. OLR is a registry similar to OCR located on each node in a cluster, but contains information specific to each node. At least three OCR locations, if OCR is configured on non-mirrored or non-redundant storage. --With Spmove command we will move the spfile 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. To downgrade, follow the downgrade instructions for each component and also downgrade OCR using the ocrconfig -downgrade command. It is useful in grading, calculating marks, etc. Our storage is EMC SAN. Learn Oracle, PHP, HTML,CSS,Perl,UNIX shell scripts, March 19, 2017 by techgoeasy Leave a Comment. This post has been answered by user00726 on Sep 7 2010. Perform the following procedure to overwrite OCR if a node cannot start and if the alert log contains CLSD-1009 and CLSD-1011 messages. 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. The number of voting files you can store in a particular Oracle ASM disk group depends upon the redundancy of the disk group. You can just replace with new voting file on disk group DATA. FAILGROUP fg02 DISK '/dev/oracleasm/disks/OCR_DISK12' [root@NODE01 ~]# /u01/app/11.2.0.4/grid/bin/crsctl query css votedisk, 3. Will install binaries on local disk and use SAN for Voting disk, OCR and ASM. Nodes have split into N sets of nodes, communicating within the set, but not with members in another set.2. You cannot use the crsctl add | delete votedisk commands on voting disks stored in Oracle ASM disk groups because Oracle ASM manages the number of voting disks according to the redundancy level of the disk group. 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. Each voting disk must be accessible by all nodes in the cluster for nodes to be members of the cluster. 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. OMR technology scans a printed form and reads from predefined positions. Few possible scenarios:1. Before you add, delete, replace, or restore voting disks, run the ocrcheck command as root. You can run this command more than once if there is more than one OCR location configured. The OCR file is automatically backed up locally in $ORA_CRS_HOME/cdata/ every four hours (note timestamp of backup*.ocr files below). You cannot repair the OCR configuration on a node on which the Oracle Cluster Ready Services daemon is running. 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. 3. A-143, 9th Floor, Sovereign Corporate Tower, We use cookies to ensure you have the best browsing experience on our website. Oracle recommends that you use the -manualbackup and -restore commands and not the -import and -export commands. 2) CSSD process on every node makes entries in the voting disk to ascertain the membership of the node. Disk heartbeat is successful, but network heartbeat is missed.3. 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. OCR contains information about all Oracle resources in the cluster. Oracle High Availability Services uses this information. OMR technology scans a printed form and reads from predefined positions. 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". Learn how your comment data is processed. ERROR: Unable to verify the graphical display setup. WebOCR and Voting Disk. In such cases, Oracle Database displays an alert message in either Oracle Enterprise Manager, the Oracle Clusterware alert log files, or both. Oracle Cluster Registry (OCR) and Oracle Local Registry (OLR) are two very important components of a Grid Infrastructure that help manage the clusterresources. 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). [root@NODE01 ~]# /u01/app/11.2.0.4/grid/bin/ocrconfig -delete +OCRVD_DG, 11. 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. "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. 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. Just one node is unhealthy. 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. The Oracle Clusterware has the OCR and voting disks open and is actively using them. CSSD processes (Cluster Services Synchronization Daemon) monitor the health of RAC nodes employing two distinct heartbeats: Network heartbeat and Disk heartbeat. 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. The destination of OCR file has been replaced. The ocrconfig -export and ocrconfig -import commands are compatible. 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. What is NETWORK and DISK HEARTBEAT and how does it register in VOTING DISKS/FILES? At this time VOTING DISK is used to communicate the node and trace information, which node is in the offline stage. Recover OCR by running the ocrconfig -restore command, as instructed in the following procedure. If it cannot access the minimum of voting disks, then it is evicted/removed from the cluster. The OLR only supports manual backups. Voting files. 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.
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