Managing Oracle Cluster Registry and Voting Disks Added on Sep 7 Cluster management is now affected on this particular node. Run the following command as root from only one node to start the Oracle Clusterware stack in exclusive mode, which does not require voting files to be present or usable: Run the crsctl query css votedisk command to retrieve the list of voting files currently defined, similar to the following: This list may be empty if all voting disks were corrupted, or may have entries that are marked as status 3 or OFF. By default, OLR is located at Grid_home/cdata/host_name.olr on each node. If you scroll through the key names below you will observe that most of the information pertains to the local resources required by OHASd (refer to the flow chart in the earlier post to see which values this file would hold). 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. [grid@NODE01 ~]$ asmcmd spmove '+OCRVD_DG/RAC-cluster/asmparameterfile/registry.183.284573136' '+OCR_NEWDG/RAC-cluster/spfileASM.ora', --Verify Depending on where you store your voting files, do one of the following: If the voting disks are stored in Oracle ASM, then run the following command to migrate the voting disks to the Oracle ASM disk group you specify: The Oracle ASM disk group to which you migrate the voting files must exist in Oracle ASM. Healthy nodes will have continuous network & disk heartbeats exchanged between the nodes. OCR While marking their own presence, all the nodes also register the information about their communicability with other nodes in the voting disk. In such cases, Oracle Database displays an alert message in either Oracle Enterprise Manager, the Oracle Clusterware alert log files, or both. It contains manageability information about Oracle Clusterware, including dependencies between various services. 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. Please sign in to comment If an OCR location suddenly becomes unavailable, then it might take a short period for Oracle Clusterware to show the change in status. OCR and Voting # /u01/app/11.2.0.4/grid/bin/ocrdump OCRDUMPFILE.root, # /u01/app/11.2.0.4/grid/bin/ocrdump -xml OCRDUMPFILE.root.xml, # /u01/app/11.2.0.4/grid/bin/ocrdump -xml -local OLRDUMPFILE.root.xml, # grep '' OLRDUMPFILE.root.xml|wc -l, # ls -trl /u01/app/11.2.0.4/grid/cdata/ol6-dr-114-rac1.olr, Oracle Cluster Registry (OCR) and Oracle Local Registry (OLR), 12c: Backup NOARCHIVELOG database using RMAN, Howto: Apply July PSU 12c Grid and DB to an Oracle 12c 2 Node RAC cluster, Howto: Apply 12c Grid and DB PSU to Oracle 12c 2 node RAC, AIX RM PARAMETER LIST IS TOO LONG 0403 027 KSH, RMAN TSM TDPO TIVOLI BACKUP RECOVERY ORACLE, SQL OPTIMIZATION INDEX LIKE OPERATOR EXPLAIN PLAN, ASM diskgroups, volumes, filesystems, and instances, Its own backups (/etc/oracle/ocr.loc and local backups in $ORA_CRS_HOME/cdata/). WebOCR and Voting Disk. The file format generated by ocrconfig -restore is incompatible with the file format generated by ocrconfig -export. [root@NODE01 ~]# /u01/app/11.2.0.4/grid/bin/ocrcheck, --Delete the old diskgroup In 10g, Oracle Clusterware can support 32 voting disks but in 11g R 2 supports 15 voting disks. If the configurations do not match, run ocrconfig -repair. d) All nodes in the RAC cluster register their heartbeat information in the voting disks/files. Healthy nodes will have a continuous network and disk heartbeats exchanged between the nodes. 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 section describes how to back up OCR content and use it for recovery. --Connect with SQLPLUS ASM instance Generally, the following information is found in the OLR. For example, if you ran the ocrconfig -restore command on node 1 of a four-node cluster, then you must run the ocrconfig -repair -replace command on nodes 2, 3, and 4. Repairing an OCR involves either adding, deleting, or replacing an OCR location. --add the new diskgroup with root user. 4. Oracle Cluster Registry (OCR) and Oracle Local Registry (OLR) are two very important components of a Grid Infrastructure that help manage the clusterresources. Attempt to resolve the cause of the CLSD-1009 and CLSD-1011 messages. 3. OCR stores Oracle Clusterware and Oracle RAC database configuration information The Oracle Clusterware installation process creates the voting disk and the OCR on shared storage. In this case, it is a little more difficult because:1. Break-in heartbeat indicates a possible error scenario. Important points about Voting disks in Oracle RAC. Ensure that the file you created is visible from all nodes in the cluster. The Oracle Clusterware has the OCR and voting disks open and is actively using them. OCR and Voting Disk Your biggest Honkai: Star Rail questions, answered "OCRDUMP Utility Syntax and Options" for more information about the OCRDUMP utility, "Using the OCRCHECK Utility" for more information about the OCRCHECK utility. Mount and check status Diskgroup in all Nodes 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. In Oracle Clusterware 11g release 2 (11.2), you no longer have to back up the voting disk. There are a few different scenarios possible with missing heartbeats:1. Use the following procedure to import OCR on Linux or UNIX systems: Check whether crsd is running. This is widely used for processing the large number of hand-filled forms which have to be processed quickly and with great accuracy. 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. Ensure there is at least 280 MB of space on the mount partition. WebOracle recommends just two diskgroups by default: A DATA diskgroup to hold all data, index, undo and temp files. 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. Once an OCR location is created, it does not get updated in the Oracle Restart environment. Hi, How the voting disk differ from the OCR. Change). voting disk Both heartbeats failed. 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. FAILGROUP fg03 DISK '/dev/oracleasm/disks/OCR_DISK13'; 6. Oracle Cluster Registry (OCR) which records cluster configuration information. Helpful tips . OLR is located on local storage on each node in a cluster. "OCRCONFIG Command Reference" for more information about OCRCONFIG commands. My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts. I am installing two node Oracle 11gR1 RAC on Solaris. 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. Without the voting disk, its difficult to know, whether nodes are facing network problems or nodes are no longer available. OCR Backups are created when the system is online. 11gR2 can have upto five mirrored copies of OCR. Save my name, email, and website in this browser for the next time I comment. OCR contains information about all Oracle resources in the cluster. difference between OCR and voting disk Move the VotingDisk to new diskgroup. [root@primary01 ~]# crsctl replace votedisk +DATA Successful addition of voting disk a6f4735a13a64f60bf31092700473fad. 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. where path like '/dev/oracleasm/disks/%' and header_status = 'CANDIDATE'; 5. OCR is more commonly used than Voting Disk. The written block has a header area with the node name. It is used in scanning and converting different types of documents. Helpful tips . Each node reads its KILL BLOCK once per second, if the kill block is not overwritten, the node commits suicide. 1. [root@NODE01 ~]# /u01/app/11.2.0.4/grid/bin/ocrconfig -delete +OCRVD_DG, 11. OCR and Voting Disk Ocr Successfully replaced voting disk group with +OCR_NEWDG. It is located on the shared cluster system or a shared raw device file or Oracle ASM(11gr2 onwards) . The ocrconfig -export and ocrconfig -import commands are compatible. 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. +OCR_NEWDG/RAC-cluster/spfileASM.ora. In a nutshell, OCR is used by CRSd and OLR by the OHASd. On Windows, use a dir command if the OCR location is a file and run GuiOracleObjectManager.exe to verify that the part of the cluster with the name exists. If you move voting disks from one Oracle ASM disk group to another, then you can change the number of voting disks by placing them in a disk group of a different redundancy level as the former disk group. Oracle However, Oracle recommends using several failure groups. Importing Oracle Cluster Registry Content on Linux or UNIX Systems, Importing Oracle Cluster Registry Content on Windows Systems. Optical Mark Reader (OMR) is the technology of electronically extracting data from marked fields such as checkboxes or bubbles from pre-printed forms. 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. 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. Nytro.ai uses technology that works best in other browsers. This section describes how to manage OCR and the Oracle Local Registry (OLR) with the following utilities: OCRCONFIG, OCRDUMP, and OCRCHECK. Modifying voting disks that are stored in Oracle ASM. Check the SPFILE location. Voting disk management requires a valid and working OCR. such as Oracle RAC databases, listeners, virtual IP addresses (VIPs), and services and any applications. Typically this is the work area and the recovery area. What is NETWORK and DISK HEARTBEAT and how does it register in VOTING DISKS/FILES? 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. Network heartbeat is successful, but disk heartbeat is missed.2. This post has been answered by user00726 on Sep 7 2010. Voting Disk. WebOracle recommends just two diskgroups by default: A DATA diskgroup to hold all data, index, undo and temp files. 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. This chapter includes the following topics: Managing Oracle Cluster Registry and Oracle Local Registry. If the OCR mirror and OCR have been deleted, then it may be faster to restore the OCR using the OCR backups. Worked as a Development and Database Administrator. Optical Mark Reader (OMR) is the technology of electronically extracting data from marked fields such as checkboxes or bubbles from pre-printed forms.
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