Highly available rac architectures including oracle 10g and 11g rac for standard edition and enterprise edition oracle data guard for high availability and disaster recovery for oracle enterprise edition. P and, if you are writing on other sites, i would like to. Here we have compiled set of questions from the students who have attended interviews in fortune 500 companies. Oracle database backup and recovery basics 10g release 2 10. In this article series, i will be explaining the new features and how they help the oracle community. Manage your account and access personalized content. How to rename an unnamed datafile unnamed00004 to original name in oracle 9i 10g 11g standby database. A complete high availability and disaster recovery strategy requires dependable data backup, restore, and recovery procedures. Using the flash recovery area, dbas can direct all backups to a single location that is managed by oracle database. Managing the oracle application server with oracle enterprise manager 10g page 8 figure 4. Manual switchover standby database switchover is a process of dataguard whether we can switch roles of a primary database to standby and a standby database to primary at runtime without loss of data and viceversa can also be done after performing another switchover.
This clause will stop the recovery process, if a new archive log does not arrive within five minutes. When you first start redo apply on a newly created physical standby database that has not yet received any redo data from the primary database, an ora01112 message may be returned. Oracle database recovery software can perform selective recovery of the components in your oracle database dbf file. Oracle data guard known as oracle standby database prior to oracle9i, forms an extension to the oracle rdbms and provides organizations with high availability, data protection, and disaster recovery for enterprise databases. Managed recovery process mrp terminates on standby database upon adding datafile on the primary database. Oracle support master note for troubleshooting managed distributed transactions doc id 100664. If we use physical standby, the mrp managed recovery process will apply to standby database. So in that case you would not be able to finish your recovery process as you can not open the database. In this mode, the primary database is configured to write archived redo logs to not only a local file system, but to also send a copy of the log file to a remote standby database location using an oracle net service name.
You can use a netvault backup job policy to submit one or more jobs that target one or more similar clients. Note that these files can either be manually managed database files or oracle managed files. This article provides instructions and notes for putting an oracle standby database in managed recovery mode. A cancelbased recovery is a type of usermanaged incomplete recovery that is performed by specifying the until cancel clause with the recover command a sqlplus command that is used to recover a database. How to resolve mrp stuck issues on a physical standby database. To start redo apply in the foreground, issue the following sql statement. Manual switchover standby database in oracle 10g find. Ppt oracle data guard powerpoint presentation free to. Stop and start recover managed standby database oracle. Recovery with oracle database 10g is automatically parallelized for these three stages of media recovery. Oracle database 12c has new enhancements and additions in recovery manager rman. How to recover deleted oracle datafiles with no downtime posted in oracle tagged data recovery advisor, dra, health monitor rman and tdpo performance.
Network service reports to rfs remote file service committed redo. Sql alter database recover managed standby database cancel. Background managed standby recovery process started 20071120 11. A better option is to run the recovery process in background. Backup and recovery 51 backup and recovery interview questions and 241 answers by expert members with experience in backup and recovery subject. Till oracle 10g, 9 standby databases are supported. Application server control consoles topology view provides a graphical, realtime view of application server processes managed by opmn. For more information, see oracle flashback technology in oracle database concepts and to configuring oracle flashback database and restore points in the oracle database backup and recovery users guide. It allows readonly access on the physical standby node at the same time as applying archived transactions from the primary node. My doubt is if a server has crashed and has not been up for lets say 24 hours. Data guard managed recovery tips burleson oracle consulting. Recovery for oracle repairs corrupted oracle databases. This indicates that redo apply is unable to determine the starting sequence number for media recovery.
Step by step process on how to configure dataguard for. Index backup and need of it different types of backup hot vs cold full vs incremental physical vs logical user managed backup rman database recovery user managed rman based flashback recovery. If you already have a commercial license, you should download your software from the oracle software delivery cloud, which is specifically designed for customer fulfillment. Oracle support master note for troubleshooting managed. Introduction to usermanaged backup and recovery oracle. To start redo apply in the background, include the disconnect keyword on the sql statement sql alter database recover managed standby database disconnect. Oracle recovery manager rman provides a comprehensive foundation for efficiently backing up and recovering the oracle database. Looking for oracle data guard interview questions with answers. To request access to these releases, follow the instructions in oracle support document 1071023. As a result oracle flags your current control files as backup ones making impossible complete db recovery. Oracle database administration on 24x7 critical production and large databases using oracle 10g rac, 11g rac, 9i, 8i. Managed recovery process mrp terminates on standby. Managed recovery process is stuck and doesnt apply more logs, what do you do to find the cause of the issue and. This master document discusses oracle managed distributed transactions.
The recovery manager continues to enhance and extend the reliability, efficiency, and availability of oracle database backup and recovery. Is it just me or does it look like a few of these remarks look like coming from brain dead individuals. Sqlalter database recover managed standby database using current logfile disconnect. Resetlogs option does not work complaining that system tablespace file is not old enough. Step by step, document for creating physical standby database, 10g data guard. It is designed to work intimately with the server, providing blocklevel corruption. Oracle database recovery software repair corrupt oracle. Dbsnmp intelligent agent pnnn parallel query mrpn data guard managed recovery mmon captures statistics for sql objects which have been recently modified checkpoint queue indicates optional setup disk recovery catalog to another instance oracle managed backups with rman crossplatform transportable tablespaces i s c a d e d a g e d. Oracle data guard provides the dba with services for creating, maintaining, managing, and monitoring one or more standby databases. Download the generated process wsdl file from oracle bpel control.
Senior oracle dba, oracle 10g, oracle 11g oce,oracle 12c and oracle 11g opn certified. To submit a batch job for example, when a job can allow little or no idle time for the server process to use recovery manager rman to back up, restore, or recover a database. The flash recovery area is an oracle managed directory, file system, or automatic storage management disk group that provides a centralized disk location for backup and recovery files. Oracle document mentions archived logs are never used during crash recovery.
The until cancel clause specifies that the recovery process will continue until the user manually cancels the recovery process issuing the cancel command. Oracle dbas are basically database administrators specialized in the most popular relational database management oracle dba. Discuss each question in detail for better understanding and indepth knowledge of backup and recovery. There are three main strands to cintras managed services. Please find the steps to rename an unnamed datafile to. Oracle database administrator resume samples qwikresume. Managed recovery process mrp applies archived redo logs to standby. If you use the oracle managed files feature, then oracle names the files for you and also deletes them for you when you drop a tablespace. Alter database recover managed standby database disconnect thu oct 2 15. Managed recovery process is not activating in data guard. Below are the steps to be followed to configure dataguard. With this, the repair process gets accomplished after scanning. Oracle database servers applications manager user guide. Physical standby database i am having problems configuring dataguard, the logs are shipping to my standby server but they are not being applied.
Cpadmin is a menubased utility that wraps multiple existing utilities for concurrent processes and allows you to work on several concurrent processrelated tasks. Oracle performs instance recovery when the database is restarted due to instance failure or shutdown the database with abort optionshutdown abort or startup the. I will take a look at two usage scenarios in which i think could offer significant benefit to anyone using oracle database flashback with a physical standby. The disconnect from session clause of the recover managed oracle instance starts recovery in a background session. Using the oracle rman image copies in the fra, dbas can very quickly recover from damage to a datafile without using a traditional restoreandrecovery operation. If the realtime apply feature is enabled as shown above, log apply services can apply redo data as it is received, without waiting for the current standby redo log file to be archived. Oracle parallel recovery tips oracle consulting, oracle. It allows you to do so on selecting the components by placing check marks on them. And i do have some questions for you if its allright. Oracle complete recovery using backup control file dadbm. From the point of view of backup and recovery, oracle managed files are no different from user managed files.
Oracle creates archived logs in the flash recov ery area. The oracle active data guard option, an extracost facility, extends oracle data guard functionality in oracle 11g configurations. This third instalment covering some of the flashback features in oracle 10g takes a look at combining flashback with using a physical standby. Applications manager supports monitoring of oracle database servers of versions 8. Alter database recover managed oracle instance timeout 5. How to resolve mrp stuck issues on a physical standby. Cancelbased recovery tamim dbas blog play with oracle. Dataguard is used to create standby database for live production database which will be used as disaster recovery for the live database. How to recover deleted oracle datafiles with no downtime. Managing the oracle application server with oracle. Managed recovery process, andor an lsp logical standby process may set. For example, if parallel recovery is performed with parallel four, and only one data file is recovered, four spawned processes read blocks from the data file and apply records instead of only one process.
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