OCR BACKUP Automatic backups : - a) Oracle Clusterware (CRSD) automatically creates OCR backups every 4 hours. Voting disk reassigns cluster ownership between the nodes in case of failure. Steps to recover control files through RMAN? Since the raw devices have been deprecated, the choice now is between a cluster filesystem or an ASM diskgroup. Voting Disk - is file that resides on shared storage and Manages cluster members. 48. Ans: OCR is a file that manages the cluster and RAC configuration. Oracle expects that you will configure at least 3 voting disks for redundancy purposes. The seal allows you to place more information. Difference Between Dataguard and Standby. Also the data is automatically restored to any voting that is added. The Voting Files are managed in a similar way to the OCR. How to find Difference between Two Date Coulmns. Restarting the nodes using srvctl seemed to resolve the performance issue. 47. Voting disk and OCR can be keep in same disk-group or different disk-group; Voting disk and OCR automatic backup kept together in a single file. From the documentation Cluster Ready Services (CRS): The primary program for managing high availability operations in a cluster. and Basic Data guard ,After completing this course, students will be able to carry out: Installation of Clusterware and RAC database, Grid Infrastructure pre-installation. 25L Led bar and memory lightning. In other words, it is the use of technology to distinguish printed or handwritten text characters inside digital images of physical documents, such as a scanned paper document. How do you backup voting disk #dd if=voting_disk_name of=backup_file_name. Crsctl command is used to manage the elements of the clusterware (crs, css, evm to be more precise. Few months ago I've bought two 25L Omen computers. Run the following command as root user: ./crsctl start crs -excl. In 11g release 2 you no longer have to take voting disks backup. 11. binary backup file for OCR. The main file components of CRS are the Oracle Cluster Repository (OCR) and the Voting Disk. Ans: The voting disk is nothing but a file that contains and manages information of all the node memberships. In Solaris, they're might be slice, in Linux, they're might be slice using raw-binding or not. Ø A node must be able to access more than half of the voting disks at any time. Data Transfer. Problem: RMAN backup job is causing 100% CPU spike on the system It can be seen that number of voting disks whose failure can be tolerated is same for (2n-1) as well as 2n voting disks where n can be 1, 2 or 3. Every disk in a diskgroup is designed to have the same number of file extents. . Their OCR/Voting disk groups are being dismounted and cluster nodes evicted because writes are taking in excess of 15 secs. The High Availa­bility Services are the lower level stack (starts first). stopping the cluster stack) Start up the cluster stack in exclusive mode on a node that holds the latest. This puts "a day" as 24 hours instead of 23 hours and 57 minutes which means that this will add up slower than the other . State Type Rebal Sector Logical_Sector Block AU Total_MB Free_MB Req_mir_free_MB Usable_file_MB Offline_disks Voting_files Name. Exadata. Why odd number of voting disk? Which is better for Oracle; WHAT IS THE MAIN REASON TO INDEX FOREIGN KEYS; WHAT IS THE PURPOSE OF AN AUTONOMOUS TRANSACTION; What is Voting Disk and OCR; What is VPD (viirtual private database in . 6. Hence to save a redundant voting disk, (2n-1) i.e. What are the new features related to RAC 11gr2 which you have USE (ACTUALLY) SCAN,ASM part of GIRD home ,Voting disk and OCR on ASM etc. Now i know why i can't change some parameter through srvctl. [cssd (25186)]CRS-1714:Unable to discover any voting files, retrying discovery in 15 seconds; Details at (:CSSNM00070:) in . Restore is the process in which physical files are copied from backup to required location. You should plan on allocating 280MB for each voting disk file. - Listing of devices for OCR and voting disk? Why is the OCR&Vote disk group servicing SCAN name; Oracle DBA - what's the difference between the connection strings; Oracle 19c GI Install on OL7 : ASM disks stamped via AsmLib not getting discovered via GridSetup.sh; Oracle 11g - Decreasing Big Table Size Ok doke, First let I make it clear: Adding a disk with force should be avoided, mainly by all the rebalance involved. Add New Disk to ASM disk group. RHEL5. ACFS File systems, seem to be clustered file systems for non database files including ORACLE_HOMEs, application exe's etc ( but NOT GRID_HOME, OS root, OCR's or Voting disks ) Can you create / modify ACFS file systems using ASM. To solve this problem the ASM disk headers have new metadata in 11.2: you can use kfed to read the header of an ASM disk containing a voting disk. What's the difference between soft link and hard link? For redundancy, one should have at least two OCR disks and three voting disks (raw disk partitions). The OCR and voting must be on a shared device so a local filesystem is not going to work. What is the difference between a materialized view (snapshot) fast refresh versus complete refresh; What is the difference between RAID 5 and RAID 10? OCR,Voting Disk ,SCAN ,VIP and Interconnect and GPNP Profile Oracle Clusterware and Database HOME Installation OCR BACKUP Automatic backups : - a) Oracle Clusterware (CRSD) automatically creates OCR backups every 4 hours. HDD is larger in size. 10. 1. The 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. The voting disk has to reside on shared storage, it is a small file (20MB) that can be accessed by all nodes in the cluster. Some days ago i've stumbled with interesting problem with my voting files. 1) small LUNs, about 1GB for each VD and OCR or. MOUNTED NORMAL N 512 512 4096 4194304 3276544 1953096 409568 771764 0 N DATA/ MOUNTED NORMAL N 512 512 4096 4194304 2866976 2847176 409568 1218804 0 N FRA/ MOUNTED EXTEND N 512 512 4096 4194304 307488 192996 0 0 0 Y OCR/ You should always configure an odd number of voting disks >= 3. How to Move OCR and Voting Disk to ASM Diskgroup in 11gR2; Oracle 11gr2 Grid: root. Learn about the three levels of ASM redundancy . when a new voting disk is added the contents of the voting disk will be copied to the new disk. 2)Data Pump represent metadata in the dump file set as XML documents rather than as DDL commands. DVDscr (DVD screener) refers to a video file that is either on or taken from a disc provided before the movie is released for sale to the general public. Perform this operation on every voting disk as needed where voting_disk_name is the name of the active voting disk and backup_file_name is the name of the file to which you want to back up the voting disk contents: dd if=voting_disk_name of=backup_file_name The washer method is a close approximation which divides 96,000 seconds by 7 days = 13,500 seconds per day The shell method is similar to the washer method except for putting an extra 13 hour-mark on top of it. 47. party cluster file systems. 8. The oracle toplogy diagram for ASM in the 11gR2 ASM Admin guide, shows ACFS as part of ASM. The kfdhdb.vfstart and kfdhdb.vfend fields tell CSS where to find the voting file. My question is whenever we try to send a data into the database it shows that the info has been added successfully but, While fetching it says results no found. Need to Download Patch from metalink and deploy as per Readme document. OCR and Voting on ASM. The CRS daemon (crsd) manages cluster resources… Our storage is EMC SAN. Answer Run the following command to back up a voting disk. This does not require the ASM instance to . How do I identify the OCR file location check /var/opt/oracle/ocr.loc or /etc/ocr.loc ( depends . Tuning parameters that were used in original Export and Import, such as BUFFER and RECORDLENGTH, are neither required nor supported by Data Pump Export and Import. RMAN Backup/restore from one node to another on RAC 1. . What is the difference between OCR and Voting disk? from oracle 11.2 you no longer need to back up voting disks because the contents of the voting disks are automatically backed up in the OCR . They have created a separate ASM disk group for OCR/Voting. Also the data is automatically restored to any voting that is added. such as check voting and ocr permission but the files are in correct permission. By default, the file extent size is equal to 1 AU size. How to replace a failed ASM disk with a new disk . 15:56:28 SYS @ +ASM1:>drop diskgroup DATA; drop diskgroup DATA *. The OCR must reside on shared disk that is accessible by all of the nodes in your cluster. . Differences between EXP,IMP and EXPDP,IMPDP. You should plan on allocating 280MB for each voting disk file. Q4. You should always configure an odd number of voting disks >= 3. The figure clearly shows the difference between CD vs DVD. There are two types of voting disks: the voting disk, which contains information about node membership, and the OCR, which contains information about cluster and Oracle . What is TAF? What is the use of OCR and voting disk? This does not require the ASM instance to be up. To find the voting disk, it gets the location from the ASM disk header for the disk group containing the VD. SSD is more compact in size. Which method you have done /which tool you use. The disk method is using skills to calculate the conversion. One with R7 5700g for myself and another i5 11400 for my parents. HDD is less reliable due to possibility of mechanical failure, like head crash and susceptibility to strong magnets. 16. The difference between Oracle RAC and OPS is the addition of Cache Fusion. Why does Oracle RAC have odd number voting disk? What is the difference between a materialized view (snapshot) fast refresh versus complete refresh; What is the difference between RAID 5 and RAID 10? SSD is lighter in weight. RMAN job causing high system CPU. Reliability. OCR 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 manage information about node membership. 3. 6. For VD and OCR Should it be. 2) a shared JFS file system for all VD and OCR that is NFS mounted OR. A voting disk is a shared diks that will be accessed by all the member of the nodes in the cluster.It is used as central referece for all the nodes and keeps the heartbeat information between the nodes.If any of the node is unable to ping the voding disk,cluster immediatly recogonize the comminucation failure and envicts the node from the cluster. File Extents are the basic units in terms of how ASM stores data across the disks in a disk group. In my previous post i've wrote about (difference) between RAC and Single installation component on the example ora.asm resource. The OCR must reside on shared disk that is accessible by all of the nodes in your cluster. Hello Folks, Hope all doing good. This is because loss of more than half your voting disks will cause the entire cluster to fail. This is because loss of more than half your voting disks will cause the entire cluster to fail. The disk and the location of the Voting Files on the disks are stored internally . They follow the ASM disk group configuration with respect to redundancy, but are not managed as normal ASM files in the disk group. Migrate ASM Disks, OCR, Voting Disk to new Storage system. 4. tasks, Patching and Upgrading existing Grid Home and Dataguard installation . Automatic backup of Voting disk and OCR happen after every four hours, end of the day, end of the week; You must have root or sudo privilege account to manage it. - Cluster Voting Disk - Oracle Binaries Now we will have all the trace files, alert.log, reports and so forth in ASM which makes ASM a complete storage management system finally for both database and non-database files and completely eliminates the need for any 3 rd . Steps to install RAC? Oracle expects that you will configure at least 3 voting disks for redundancy purposes. Although there have been quite a large number of new features and significant enhancements incorporated in RMAN 11g R1 and 11g R2, this section primarily focuses on the core new features and enhancements of RMAN that are valuable to apply into your respective databases. Differences Between Enterprise, Standard Edition 2 on Oracle 12.2 (Doc ID 2243031.1) 12.2 gridSetup.sh Does Not List Disks Unless the Discovery String is Provided (Doc ID 2244960.1) Posted by "renamedg" utility can be used to rename of the diskgroup when the diskgroup is dismounted. 49. Ans: A symbolic (soft) linked file and the targeted file can be located on the same or different file system while for a hard link they must be located on the same file system, because they share same inode number and an inode table is unique to a file system, both must be on the same file system. Recovery is the process of making the copied datafiles up to date with the help of archive redo log files. I will appreciate suggesions for VD and OCR configuraion. What Is The Difference Between Oracle Rac And Grid? For this reason you can only have one OCR (or SPFILE) in a diskgroup. ASM Disk Rebalancing operations . 45) Can you have many database versions in the same RAC? ./crsctl stop crs (use -f flag if you have any issues. OMR Home's trusted Verificare OMR Software is an all-inclusive tool to design, scan and read OMR sheets with ease and accuracy, it is also the most economical, easy to afford OMR software. Problem I have is that I cannot control led bar and memory . an odd number of voting disks are desirable. The OCR contains cluster and . 43)What the OCR file is used for? The prior CSS MISSCOUNT default was 200 secs. How many OCR and voting disks should one have? OCR and Voting disk file: ./ocrconfig -showbackup. When you use normal redundancy, Oracle Clusterware automatically maintains two copies of the OCR file and three copies of the voting disk file. OCR, OLR and Voting Disk in Oracle RAC || Real Application Cluster:=====. 5. Space occupied by ocr & vote disk [oracle@example1a ~]$ ocrcheck Status . There are no difference between the way you start a normal database and RAC database, except that a RAC database needs to be started from multiple nodes. Add New Disk to ASM disk group. Difference Between 12c, 18c & 19c Clusterware/RAC/ASM Features. Add/delete vote disk . In the prior releases of Oracle, the Oracle Cluster Repository (OCR) and Voting Disks were on raw devices. In SSD the data transfer is random access. What is the PGA_AGGREEGATE_SIZE? For exemple, with crsctl you can tune the heartbeat of the cluster, while with srvctl you will . Size. Oracle Data Guard. How do I identify the voting disk location #crsctl query css votedisk. DBA Sheet. 8)Adding voting disk 9)Deleting voting disk DAY 4: 1)What is OCR 2)Trouble shooting OCR 3)OCR Components 4)OCR Backup and Recovery 5)Recovering OCR disk 6)Adding services to OCR 7)RAC 11gR2 New features a) Administration in 11gR2 b) User Specific Action c) startup and shutown d)Cluster Status e)SCAN -Single Client Access Name f)Client . "Is there any difference between using srvctl vs using sqlplus for starting or stopping one or more database nodes."? Consider an 11.2 Grid Infrastructure with CLUSTER setup having OCR, Vote File and ASM SPFILE on a diskgroup. 49. What are the major difference between 9i RAC and 10g RAC? 7. Oracle 12c Real Application Clusters (RAC) Oracle DBA Interview Questions. 44)What the Voting Disk file is used for? 7. Oracle® Clusterware Installation Guide 11g Release 1 (11.1) for AIX Based Systems Part Number B28258-05 48. May. R7 came with no RGB lightning except front logo so I decided to swap for glass side panel, led bar and rgb memory from intel model. I have been working for a company where they provide online classes for different technologies. Minimum 1 and maximum 15 copy of voting disk is possible. . CREATING DISK GROUP From Oracle's docs:. 2. How do you backup voting disk #dd if=voting_disk_name of=backup_file_name. The voting disk and the OCR must reside on shared storage. Significant changes happen on ODAs most often during the application of new ODA patch bundles. The CLUSTER_DATABASE=TRUE (PARALLEL . Voting hack. . The Oracle Clusterware requires two clusterware components: a voting disk to record node membership information and the Oracle Cluster Registry (OCR) to record cluster configuration information. Ans: As OCRs files are present in ASM diskgroup, While starting the CRS, it wont be able to Access OCR file to find the cluster resource information. 9. This does not require the ASM disk group to be mounted. On the first disk (standard 700 MB), the grooved tracks are located at a distance of 1.6 µm from each other, on the second there is only 0.74 µm between them; pit length 0.8 - 3.1 microns and 0.4 microns, respectively. How do I identify the voting disk location #crsctl query css votedisk. We have had some instances where it seemed that starting rac databases through sqlplus caused performance issues (high load on database server ). This course is designed for Oracle Clusterware architecture and General ASM Concept, RAC database. Every node has its own dedicated OLR file. your voting disk data is automatically backed up in the OCR whenever there is a configuration change. There are other components of the clusteware such as OCR,voting disk, managed by other tools ) while srvctl is used to manage the elements of the cluster (databases,instances,listeners, services etc) . It uses the OLR and the GPnP profile since ASM and the OCR is not yet available. Difference between AIOps and Artificial intelligence (AI) if any node is not passing heart-beat across other node or voting disk, then that node will be evicted by voting disk. How do I identify the OCR file location check /var/opt/oracle/ocr.loc or /etc/ocr.loc ( depends . Oracle Clusterware OCR and Voting Disk (19:43) Oracle Clusterware Background Processes (24:50) Setup RAC Nodes on Virtual Box Lab Setup Overview (9:51) Understand Basic Networking (36:01) . Voting Disk - is file that resides on shared storage and Manages cluster members. How to create duplicate database? . SAN will present LUNs to our both nodes. Ø Oracle recommends minimum of 3 and maximum of 5. What do you understand from MVIEW? When you use normal redundancy, Oracle Clusterware automatically maintains two copies of the OCR file and three copies of the voting disk file. After i've restarted my cluster software on one of my node, i've can't bring it back online, because the voting files has lost. Difference between activeversion, releaseversion and softwareversion:

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