Move ocr and vote file from current diskgroup to crs. Migrating oracle cluster registry to oracle automatic storage management. When multiple engines generate different recognition variants for a character or word, the developer can select the best variant by voting between the variants. 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. Create new directory for installing 12c software on both rac nodes. Mar 28, 2015 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.
Aug 24, 2012 adding ocr and voting disk mirroring in oracle 10g the oracle clusterware crs includes two important components. In this post, i will start from ocr recovery, and then voting disk recovery. We need to access the ocr and voting disk to bring up the cluster. With oracle clusterware 18c and before, you must store ocr and voting files on oracle. Voting disk migration ocr disk migration oracle wait events month wise space growth oracle trainings in support. Moving oracle cluster registry andor voting disks to different location important note. To solve this problem the asm disk headers have new metadata in 11. Moving ocr you must be logged in as the root user, because root owns the ocr files.
Amazingly, we can now store the two inside of an automatic storage management asm disk group, which was not possible. Mar 09, 2015 ocr and voting disk are critical components for oracle rac. Sep 04, 2010 this entry was posted in oracle automatic storage management, oracle cluster ready services, oracle real application cluster and tagged moving ocr voting disk from asm to filesystem in 11gr2. How to restore the ocr and voting disk when they are lost by admin published 24 august 2019 updated 01 october 2019 11gr2 restore ocr votedisk based on asm, when loss of crs diskgroup. Sep 04, 2010 in oracle 11gr2 we can use asm as the storage for ocr and voting disks. Restoring voting disks 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.
Recover the oracle voting disk when its backup is missing. Hello, we need to move ocr, voting disk and asm from one storage media to another. You can store ocr and voting disks on oracle automatic storage management. You probably played with the procedure and it worked just fine. Oracle professional anand chavan offers these steps to migrate ocr and voting disk onto asm storage using asmca. Managing oracle cluster registry and voting files oracle docs. It looks like the worst case, but we still have backups of ocr and voting disk on server, plus a full database backup. Multiple ocrs and vote disks on asm in oracle 11gr2 edited. When upgrading 11gr2 rac you might want to consider putting the ocr and voting disk into asm.
For example, if you join two large tables, and oracle cannot do the sort in memory. How to restore 12c clusterware ocr voting disk ed chen logic. You are faced with a corrupt or missing oracle cluster registry ocr and have no. Multiple ocrs and vote disks on asm in oracle 11gr2 guenadi. How to restore the ocr and voting disk when they are lost. How to restore the ocr and voting disk when they are lost by admin published 24 august 2019 updated 01 october 2019 11gr2 restore ocr votedisk based on asm, when loss. Aug 20, 2010 recover corruptmissing ocr and voting disk without backup it happens.
As you can see, having a backup of the ocr and voting disk can dramatically simplify the recovery of your system. That is to say, as long as you have the latest ocr backup, you automatically have voting disk backup too. Now check again and the ocr files have been moved to the ocr diskgroup. Moving ocr and voting disk into asm is the oracle grid infrastructure or. You can use them to display text, links, images, html, or a combination of these. Move ocr and voting disk to asm september 23, 2010 ebob leave a comment go to comments ocr and voting are tools used by the oracle grid to store cluster metadata. In this particular post well take a look at the steps we went through for the diskgroup that is used by our oracle rac servers for the oracle cluster. Sep 23, 2010 move ocr and voting disk to asm september 23, 2010 ebob leave a comment go to comments ocr and voting are tools used by the oracle grid to store cluster metadata. How to migrate asm disk groups to another storage online when asmlib devices are involved. The voting disk is a file that manages information about node membership, and.
Also an ocrmirror must be in place before trying to replace the ocr device. In fact according to oracle documentation restoration of voting. Aug 24, 2019 how to restore the ocr and voting disk when they are lost by admin published 24 august 2019 updated 01 october 2019 11gr2 restore ocr votedisk based on asm, when loss of crs diskgroup. Were migrating data from our old cx4 to a new vmax10k. Relocating the ocrvoting disks for a 12c rac the gruffdba. Migrate voting disk from the current location, which is asm diskgroup. Directly restore of a manual automatic ocr backup is not possible. Recently we had to migrate our asm disks to a new san. Suppose we have lost all disk groups as well as ocr data, voting disk and management database mgmtdb in a disaster, we have to rebuild 12c clusterware nearly from the ground up for later 12c rac database restoration. How to recreate ocr voting disk accidentally deleted. Voting disks manage information about node membership. This is a text widget, which allows you to add text or html to your sidebar. Ocr manages oracle clusterware and oracle rac database configuration information.
Make sure there is a recent backup of the ocr file before making any changes. In oracle 11gr2 asm disk groups are used to store the ocr and vote disks. Depending on your printer, you have to activate the product after installation. The rebalance feature in oracle asm makes data migration very easy and seamless. A second and much more efficient method used to recreate the ocr and consequently the. This configuration will provide 3 voting disks 1 on each fail group and a single ocr which takes on the redundancy of the disk group. Apr 23, 2017 voting disk backup in 10g dd if voting disk path of voting disk restore in 10g dd if of voting disk path in 11gr2, the voting files are backed up automatically as part of ocr. Oct 06, 2010 having just delivered an oracle database 11gr2 rac admin course, id like to point out some remarkable changes in the way we handle now the important clusterware components voting disk and oracle cluster registry ocr. The work for doing this is pretty simple and straightforward and all can be done online without any downtime. Starting with oracle 11gr2, oracle recommendation is to use oracle asm to store ocr and voting disks.
Multiplexing ocr and voting disk 11gr2 lisas oracle blog. Each voting disk must be accessible by all nodes in the cluster for nodes to be. You are faced with a corrupt or missing oracle cluster registry ocr and have no backup to recover from. To upgrade to oracle clusterware 12 c from a previous oracle clusterware release on which you were using raw or block devices, you must migrate ocr and voting files to oracle asm or a shared file system before you upgrade. In this particular post well take a look at the steps we went through for the diskgroup that is used by our oracle rac servers for the oracle cluster registry ocr and the voting files. Jun 16, 2019 that is to say, as long as you have the latest ocr backup, you automatically have voting disk backup too. Starting 11gr2, oracle automatically takes backup of voting disk too in ocr backups. If you doubt about it, you should take a look at how to restore 12c clusterware including ocr and voting disk. If you work with rac, you know about metalink note 399482. Step by step upgrade oracle rac grid infrastructure and. How to move ocr and voting disks into asm martins blog. Each voting disk must be accessible by all nodes in the cluster.
How to restore 10g clusterware ocr voting disk ed chen logic. The goal here is to move ocr, voting disk file and asm spfile in a grid. In this article we are going to see voting disk in oracle rac database concepts oracle clusterware uses voting disk files to determine which nodes are members of a cluster. Currently voting disk and ocr are stored in external redundancy. In other words, for 12c rac database, you should only backup ocr instead of backing up voting disk. Jul 22, 20 how to recreate ocrvoting disk accidentally deleted applies to. The steps for 11gr1 and earlier versions are different. Recover voting disk and ocr in 11gr2 oracle data point. You can use any backup software to copy the automatically. Prior 11gr2 rac, ocr and voting disk are store in a nonasm shared storage technology. Asm disks in an oracle asm disk group to manage ocr and the voting files. Finding owner of forms process space usage on table. Dec 21, 2015 software modernization system migration. That is to say, we need to rebuild rac environment almost from the ground, except installed clusterware and database software.
High level steps would be 1 stop your crs 2 add one voting device crsctl add css votedisk 3 remove the old device crsctl delete css votedisk 4 startup crs. Oracle recommends not used dd command to backup or restore as this can lead to loss of the voting disk. If you do not configure voting disks on oracle asm, then for high availability, oracle recommends that you. Jun 21, 2011 prior 11gr2 rac, ocr and voting disk are store in a nonasm shared storage technology. Now we have a new disk group and we can start moving. Suppose we have lost all disk groups as well as ocr data, voting disk and management database mgmtdb in a. The voting disk and the oracle cluster registry ocr. This post is about how to migrate oracle asm data to another storage, for my environment, is migrating from hhd storage to ssd storage, the redo blocksize also need to be modified to 4k for good. Install and upgrade grid from 11gr2 to 12cr1 verify upgrade version database. How to move ocr, vote disk file, asm spile to new diskgroup. Moving oracle cluster registry andor voting disks to. In case of a disk failure of the actual voting disk device, asm automatically chooses another disk to be the new voting disk.
But without being part of the cluster, cssd cannot start the asm instance. Hence, use separate disk group with normal redundancy with one disk quorum is the method to multiplexing voting disks. Create an asm diskgroup using asmca create diskgroup data external redundancy disk orcl. How to backup clusterware ocr and voting disk ed chen logic. To upgrade to oracle clusterware 12 c from a previous oracle clusterware release on which you were using raw or block. This entry was posted in oracle automatic storage management, oracle cluster ready services, oracle real application cluster and tagged moving ocr voting disk from asm to. Addition and deletion of voting files are not allowed because the voting files are on asm.
The only thing that you must read more how to restore 12c clusterware ocr voting disk. High level steps would be 1 stop your crs 2 add one voting device crsctl add css votedisk 3 remove. Adding ocr and voting disk mirroring in oracle 10g the oracle clusterware crs includes two important components. Lacp bonding and linux configuration steps to migrate multiple iis sites new. In our configuration the spfile is located in the ocr and it should also move to the new disk group for the ocr. Of course, you back up the voting disk every time you change your rac configuration, or on a regular basis. Temporary tablespaces are used to manage space for database sort operations and for storing global temporary tables. Directly restore of a manual automatic ocr backup is not possible, if the ocr is stored on asm disk group. You can configure voting disks on oracle asm, or you can configure voting disks on shared storage. When upgrading 11gr2 rac you might want to consider putting the ocr and voting disk into asm now. In addition to migrating the asm disk groups storing databases data files, all clusterware files ocr and voting disk must be migrated too.
Reboot both nodes in order to see corruption voting disk a. This post is applicable only for oracle databases 11gr2 onwards. A second and much more efficient method used to recreate the ocr and consequently the voting disk as well is to rerun the root. Create an asm diskgroup using asmca create diskgroup data external. Moving oracle cluster registry and or voting disks to different location important note. When multiple engines generate different recognition variants for a character or word, the. I think asm related files are very easy to movere map but how ocr and voting disk files will be migrated to the new storage media.
Online san storage migration for oracle 11g rac database with. In fact according to oracle documentation restoration of voting disks that were copied using the dd or cp command may prevent your clusterware from starting up. Adding new san disks to asm for ocr disk group hey alfredo. Recreating the voting disk may not be as easy as written in metalink. Instruction are included in this guide on how to perform backups of the voting disk and ocr file. How to recreate ocrvoting disk accidentally deleted. Restoring ocr and voting disk on 11gr2 prakash blog. The voting disk is a file that manages information about node membership and the ocr is a file that manages the real application cluster rac database configuration information. Depending on your printer, you have to activate the. Aug 03, 2012 multiple ocrs and vote disks on asm in oracle 11gr2 edited. Oracle clusterware 12 c does not support the use of raw or block devices. In oracle 11gr2 we can use asm as the storage for ocr and voting disks.
Verify that voting disk is on raw storage before migration. Migrating segment serial direct load insert software sql loader srvctl modify. Mann, yes, the ocr and voting disk can be relocated to another storage. Oct 05, 2009 in addition to migrating the asm disk groups storing databases data files, all clusterware files ocr and voting disk must be migrated too. Olr resides on every node in the cluster and manages oracle clusterware configuration information for each. Overview of oracle clusterware platformspecific software components. It is highly recommended to take a backup of the voting disk and ocr file before making any changes. Jan 18, 2014 this configuration will provide 3 voting disks 1 on each fail group and a single ocr which takes on the redundancy of the disk group. Voting disk backup in 10g dd if of voting disk restore in 10g dd if of in 11gr2, the voting files are backed up.
How to recreate ocrvoting disk accidentally deleted oracle. Reboot both nodes in order to see corruption ocrvoting disk accidentally deleted applies to. Ocr and voting disk backup and make a ocr and voting disk. In other words, for 12c rac database, you should only backup ocr instead of. How to move ocr and voting disk to new storage device. Moving ocr voting disk from asm to filesystem in 11gr2. Posts about ocr voting disk restore written by emiliano fusaglia. Jan 23, 20 oracle 11gr2 clusterware ocr and voting disks recovery. If any node is not passing heatbeat across other note or voting disk, then that node will be evicted by voting disk. As can be seen above, the disks are not yet identified by the driver in rac2. Olr resides on every node in the cluster and manages oracle clusterware configuration information for each particular node. Recover corruptmissing ocr and voting disk without backup it happens. Having just delivered an oracle database 11gr2 rac admin course, id like to point out some remarkable changes in the way we handle now the important clusterware components voting.
Oracle 11gr2 clusterware ocr and voting disks recovery. Make it easier for other people to find solutions by marking a reply accept as solution if it solves your problem. Ocr voting api the term voting in ocr is used when developers combine multiple ocr engines in their solutions. Ocr software download hp support community 5382507.
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