Switchover and failover for oracle rac database using. Step by step guide on how to create a physical standby. In order to apply redo data to the standby database as soon as it is received, use realtime apply. Switchover, failover physical standby database oracle. Please see the following causes and solutions for the mrp stucking issues on a physical standby database. How to resolve mrp stuck issues on a physical standby database. I want to use the switchover command with dgmgrl to switch over to my data guard standby database. Switchover standby to primary database expert oracle dba. Oracle data guard physical standby database disabled posted on september 11, 2017 by admin this past week, i was working on a task nobody anywhere ever. On a previous document, 10g data guard, physical standby creation, step by step i did describe how to implement a data guard configuration.
Oracle data guard switchover from dcprimary to drstandby switchover and failover. Manually create a physical standby database using data. In this article, i will write about how to switchover from the previous article scenario. For disaster recovery requirements, it is ideal to install the faststart. Physical standby database failover with data guard as previously mentioned, the physical standby database is an exact copy of the primary database on a blockperblock basis. Data guard physical standby setup using the data guard broker in oracle database. Activating the standby database oracle 10g, physical standby.
A physical standby database can be used for backups and readonly reporting, thereby reducing the primary database workload and saving valuable cpu and io cycles. Using data guard, you can change the role of a database using either a switchover or a failover operation. My purpose on this post is a quick stepbystep on how to perform a switchover on an oracle physical standby database. Oracle cloud infrastructure database service version na and later information in this document applies to any platform. Manual physical standby failover activate standby database oracle 11g manual data guard partv published may 12, 2016 may 15, 2016 by jignesh jethwa in case of disaster with primary database site, or not available for production for any reason then we can activated standby database as a primary production database. Faststart failover is an oracle data guard 10g release 2 1 feature that. During a recent switchover of my physical standby to a primary role, i followed all the. Oracle data guard physical standby database disabled.
In this video you will learn about the different types of standby databases in an oracle data guard environment. This way of role transition where the current primary database starts behaving as a physical standby and on the other hand the current physical standby database starts behaving as a primary database. Initiate the switchover on the primary database prim. All the commands in this blog has been tested in test environment only,so please run and test these commands in your test environment before running it. Step by step, document for creating physical standby database, 10g data guard oracle 10gr2 rac installation in linux 5, rhel5 using vmware server2 recreate lost controlfile.
Stepbystep instructions for creating a physical standby database. Performing switchover on oracle standby database db world. Faststart failover to a physical or a logical standby database 11. How to resolve mrp stuck issues on a physical standby. Switchover primary to standby in 10g deepakdbas blog. Oracle database 10g automatic storage management asm is an integrated. Manual switchover standby database in oracle 10g find.
Restarts the new standby former primary database if the switchover occurs to a physical standby database, and redo apply begins applying redo data from the new primary database. Oracle data guard is a crucial part of the insurance policy that guarantees against unrecoverable disasters. Each new release of oracle has augmented these disaster recovery features, and oracle database 11g expands them dramatically to include the capability to keep a standby database open for readonly queries while still accepting change vectors from the primary database. Switchover is a two way process in oracle dataguard. A standby database can be either a physical standby database or a logical standby database. Role transitions involving logical standby databases. Standby database is up with managed recovery mode and there is no archive log gap found in physical standby database. Switchover to a physical standby using oracle enterprise. Configuration of oracle 10g data guard pavan dbas blog. Switchover operation can perform without dataguard and with dataguard. Oracle 8i oracle 9i oracle 10g oracle 11g oracle 12c oracle c oracle 18c oracle 19c miscellaneous plsql sql oracle rac oracle apps weblogic linux mysql. Broker and switchover a configure dataguard broker tool. A switchover consists of the change of roles between the primary and standby database.
A primary database that is running normally the switchover operation must start from the primary site. Configuration oforacle database 10g data guard dated. To set up a physical standby database, please refer to my orafaq blog oracle 10g manually create a physical standby database using data guard. Active data guard does not support any writes to the physical standby database.
This new type of standby database keeps in sync with the. Any primary database instances shut down at this time can be started after the switchover completes. Data guard supports both physical standby and logical standby sites. Accept the create a new physical standby database option by clicking the continue button. A physical standby database is an identical, blockforblock copy of the primary database and is kept in sync with the primary using media recovery also referred to as redo apply. Data guard switchover with dgmgrl burleson oracle consulting. Use data guard switchover to move production to asm. Data guard configuration example oracle 10g, physical standby. Data guard is the name for oracles standby database solution, used for disaster recovery and high availability. In oracle database 10g release 2, a physical standby database can also be easily converted back and forth between being a physical standby database and an open readwrite database. Generally, an ebook can be downloaded in five minutes or less. Oracle introduced a new type of standby database with oracle9i release 2 named logical standby database. In a switchover the primary database is transitioned to the standby role and the standby database is transitioned to the primary role.
During a switchover, the primary database transitions to a standby role and the standby database transitions to the. If this is an oracle rac physical standby database, the broker directs oracle clusterware to restart the instances that were shut down prior to the switchover. You can manually create a physical standby database in maximum performance mode using asynchronous redo transport and realtime apply, the default oracle data guard configuration. The software which oracle corporation markets as oracle data guard forms an extension to. The role transitions described in this chapter are invoked m anually using sql statements.
How to perform switchover in dataguard oracle database. Data guard switchover to a physical standby oracle distilled. Oracle dbas rely on oracle data guard to provide continuous uptime in the event of storage subsystem failure, sitewide failure or disaster. I have been working on data guardstandby databases using both grid control and sql command line for a couple of years, and my latest experience with data guard was manually creating a physical standby database for a laboratory information management system. Notice that the standby database is now the standby database and the primary database, proddb, is now standby. Scheduled and unscheduled maintenance at primary site e. Using recovery manager with oracle data guard in oracle database 10g executive summary a welldocumented and validated system and software recovery plan is critical to an overall high availability strategy. Faststart failover oracle data guard 10g release 2. Oracle 10g manually create a physical standby database using.
Manual failover,failover,physical standby,standby database. Refresh and switchover to the physical standby oracle database. A switchover is a role reversal between the primary database and one of its standby databases. Install oracle database software without the starter database on the standby server and patch it if necessary. Before performing a switchover from an oracle rac primary database to a physical standby database, shut down all but one primary database instance.
Article i had written previously was the creation standby database with rman active database duplication. Here we can see how to perform switchover operation without dataguard configuration. During a switchover, the primary database transitions to a standby role and the standby database transitions to the continue reading. Recovery process on a physical standby, or the sql apply process on a logical. Oracle database 11g release 2 data guard setup using oracle grid control. Install oracle database 10gr2 for physicallogical standby.
Preparing the primary database for standby database creation. Oracle 10g data guard is a great tool to ensure high availability, data protection and disaster recovery for enterprise data. Before performing a switchover to a physical standby database that is. One of the nice things about doing the switchover through oracle enterprise manager 11gr1 grid control is that the entire monitoring configuration is updated to reflect the change. If the mrp stucking issues still couldnt be resolved, then you could use rman incremantal backup method to roll forward your physical standby database. Oraclebase data guard physical standby setup using the data guard broker in oracle database 18c. This is typically done for planned maintenance of the primary system. Data guard physical standby setup using the data guard broker in oracle database 11g release 2. Performing switchover with no broker manual overview. Use the recover standby database command with the from service clause to refresh a physical standby database with changes that were made to the primary database. In short we can say that our standby database is synchronize with primary database. Application dr tests switchover can be used for a dr test that tests nondatabase parts failover is the right. This is the situation though if i build physical first and then create a logical standby, upon the switchover to physical, logical doesnt know where the primary is now. This article presents switchover and failover methods available for physical standby database in oracle database 12c release 1 this article is based on following article.
Configure physical standby database oracle database 12c release 1 12. After the switch, the primary will turn into the standby database and the standby into the primary. I have played with physical and logical standby database. Performing switchover in 11gr2 standby steps dba tutorials. Oracle data guard standby databases overview dg video.
Role transitions involving physical standby databases. Oracle data guard 10g release 2 switchover and failover best practices. Oracle 10g manually create a physical standby database. This section is what data guard is really all about, its about a standby database taking over the production database, and how to revert back when problems have been fixed.
Install the observer by installing the oracle client administrator. Data guard switchover to a physical standby a switchover can be used to reduce downtime for planned outages such as patching to the database or host os and hardware upgrades. What will be state of the instance, controlfile, datafile header if we do not use the disconnect from session clause, i know the session will hung and we can not do anything. So, primary database will operate as standby and standby will operate as primary database. Asm migration using oracle data guard physical standby. Configuration of oracle database 10g dataguard slideshare. With a switchover, there is no data loss, and the old primary database will. Oracle 10g data guard quick switchover with physical. In my previous article we have covered how to configured oracle 11g data guard on centos 6. Physical standby database standby primary database. Using recovery manager with oracle data guard in oracle10g. During a switchover, the primary database transitions to a standby role, and the standby database transitions to the primary role. Switchover in 12c is still the same, but new features have been incorporated and.
Data guard switchover with dgmgrl oracle database tips by donald burlesonmarch 11, 2015 question. A switchover allows the primary database to switch roles with its standby database. Switchover to a physical standby database oracle community. Oracle 11g data guard switchover and switchback active. Manual switchover without dataguard in oracle dbametrix. You can also use the oracle data guard broker to simplify role transitions and automate failovers. Oracle 10g11g create a physical standby database using. Hello all, i have completed switchover to a physical standby database succesfully. For more detail kindly check our article in oracle.