Switchover to physical standby database in oracle 11g. In my previous article we have covered how to configured oracle 11g data guard on centos 6. Oracle 11g data guard switchoverfailover quick stepbystep. If you are using oracle enterprise manager 11gr1 grid control the switchover can be accomplished in just a few mouse clicks. I have an api server running in windows iis which connects to the primary database via oracle 11g client. Guard in the oracle data guard concepts and administration manual and on the. Oracle 12cstep by step manual data guard switchover. In this article, i will write about how to switchover from the previous article scenario. Switchover to physical standby database in oracle 11g once the standby database is configured and works fine then we can switchover to standby database for testing purpose to reduce the primary database downtime. Oracle data guard in oracle database 10g release 2. Nitin is a wellknown oracle technologist and speaker in the areas of oracle storage, high availability, oracle rac, and private database cloud.
Were have a primary and 3 physical standbys in arch mode. We usually recommend to use the broker and i wanted to see if the broker uses that new command or not. How to perform switchover in dataguard oracle database. Oracle data guard in oracle database 10g release 2 business. You can use the data guard commandline interface as an alternative to the data guard graphical user interface gui, integrated with oracle enterprise manager, for. Please suggest or share any document where step by step mention. In remote dba services, these type of oracle errors are very critical to manage if you havent access of some commands or not having more knowledge of operating system commands. Verify that the oracle instance is in archivelog mode. A manual failover would be required in order to execute a failover to any of the additional standby databases within the configuration. A switchover can be used to reduce downtime for planned outages such as patching to the database or host os and hardware upgrades. This paper only applies if you are starting with any release prior to 11g 11. Dgmgrl shows that configuration and databases have been set with success.
Data guard is the name for oracle s standby database solution, used for disaster recovery and high availability. During a switchover, the primary database transitions to a standby role and the standby database. During a switchover, the primary database transitions to a standby role, and the standby database transitions to the primary role. See using far sync instances in oracle data guard concepts and administration for examples of how to set up such configurations correctly so that the far sync instances can service the new roles of the two databases after switchover. Data guard normally ships redo as it is generated, data guard does not normally wait for an archive redo log to fill up. Oracle 11g data guard switchover and switchback data. Oracle10goracle11g data guard switchover and switchback switchover and switchback are very important mechanisms to validate the integrity of oracle data guard configuration. For information about all of the oracle highavailability solutions and the benefits of faster data guard failover and switchover, refer to the oracle database high availability overview4. Sep 29, 2008 oracle 11g data guard switchoverfailover quick stepbystep guide assumptions in this sample, it is assumed that you already have your oracle 11g primary database functioning, and have already set up a oracle 11g physical standby database, and can access them using the data guard commandline interface dgmgrl utility. Switchover and switch back oracle case studies, make it simple. Primary database may need downtime for many reasons like os upgradation, hardwares upgradation and for many other issues. Oracle has introduced the verify functionality which does not perform the switchover but does verify if the switchover can be performed to the target standby database.
In a switchover the primary database is transitioned to the standby role and the standby database is transitioned to the primary role. A switchover is a role reversal between the primary database and one of its standby databases. So, primary database will operate as standby and standby will operate as primary database. Article i had written previously was the creation standby database with rman active database duplication. Jan 01, 2012 my purpose on this post is a quick stepbystep on how to perform a switchover on an oracle physical standby database. The discussions and examples in this manual use the data guard broker. About author hailie jiao works as oracle dba at baltimore, maryland. If there is a far sync instance or a combination of preferred and alternate far sync instances connecting the primary and standby databases, then the procedure to switchover to the standby is the same as described in this topic. Dataguard 10g switchover question oraclel freelists. Oracle corporation, 500 oracle parkway, redwood city, ca 94065 the programs are not intended for use in any nuclear, aviation, mass transit, medical, or other inherently. If the database is open for query, the switchover operation will take longer to complete. You can, however, perform a manual failover to a snapshot standby. During switchover, the primary and standby must be able to communicate directly with each other and perform the switchover role transition steps oblivious of the far sync instances. The oracle instance can be in managed recovery mode or open for read only.
Oraclel dataguard 10g switchover question grokbase. Switchover of physical standby database in 11g shivananda rao. In 12c the manual switchover to physical standby requires only one command alter database switchover instead of two alter database commit to switchover on each database. Over the past 15 years of oracle journey, he involved with several local and large scaled international banks where he implemented and managed highly complex cluster and noncluster environments with over 100s of business critical databases. Switchoverfailover history data guard 10g 808771 dec 3, 2010 4. A switchover guarantees no data loss and is typically done for planned maintenance of the. Maintain and support oracle 11gr1, 11gr2, 12c rac, physical and logical standby database for test, development, and production for various homedeveloped applications involve in 24x7 oncall support for 12 databases of 2. Prior to joining ddr, he was a senior analyst in the languages division of oracle worldwide technical support, focusing on all of oracle s language tools. Manual switchover standby database in oracle 10g find. The data guard commandline interface enables you to manage a data guard broker configuration and its databases directly from the command line, or from batch programs or scrip ts. Oracle license agreement, and, to the extent applicable, the additional rights set forth in far 52. Step by step switchover in 10g data guard how to perform.
Performing switchover with no broker manual overview. Configure physical standby database oracle database 12c release 1 12. The best practices described in this paper require oracle database 12. Jun 06, 2010 if you are using oracle enterprise manager 11gr1 grid control the switchover can be accomplished in just a few mouse clicks. After configuring data guard, databases would be either primary and standby database role, and we can altered these roles without loss of data or without resetting logs called switchover. Standby databases before switchover to the new primary database. Using switchover operation we can convert physical standby database to primary and primary database to physical standby. Oracle10goracle11g data guard switchover and switchback. Switchover to a physical standby using oracle enterprise. Although the instances are shut down, the role change will be. Performing a switchover to a physical standby database. Data guard switchover with dgmgrl burleson oracle consulting.
Installation of oracle 11g databases in production, development and test environments depending on project requirements. Overview switchover on oracle data guard 11g duration. I have two oracle 11g r2 databases on separate servers primaryphysical standby with data guard configured to switch over between the two. Performing a switchover to a physical standby database note. After the switch, the primary will turn into the standby database and the standby into the primary. Graceful switchover and switchback activity in dataguard. Errors during databaguard broker switchover oracle community. Resolution ddr team in oracle s server technology division. Graceful switchover and switchback activity in dataguard on september 26, 2015, posted by tj, in oracle, by standby database, switchover and switchback standby, switchover in dataguard, with 1 comment. On a previous document, 10g data guard, physical standby creation, step by step i did describe how to implement a data guard. Manual recovery of archived redo log files in an archive gap. Manual switchover standby database in oracle 10g find the.
Switchoverfailover history data guard 10g oracle community. Oct 08, 2014 in my previous article we have covered how to configured oracle 11g data guard on centos 6. For complete details on doing a data guard switchover, see the book oracle data guard by bipul kumar. Apr 23, 2012 a switchover is a role reversal between the primary database and one of its standby databases. Oracle data guard concepts and administration oracle docs.
I just setup a primarystandby pair managed by dataguard broker and when i. A switchover consists of the change of roles between the primary and standby database. If data guard did that you would always be behind by an archive redo log at least you would lose lots of data during a failover. To primary this is a standby database, with no active sessions, that is allowed to switch over to a primary database. During a switchover, the primary database transitions to a standby role and the standby database transitions to the. She is an oracle 10g certified professional and 9i certified associate. After my initial setup i can ship and apply logs from the primary database to the standby db. After that we open new standby database mount mode. Configuration of 10g data guard broker and observer for. This is just a priimary database and its standby with no rac configured. Faststart failover oracle data guard 10g release 2. He is the author of oracle automatic storage management and the data guard handbook both from oracle press and has written many papers on storage, database internals, database tuning, and served as a. Maximum availability architecture oracle data guard 10g release 2 switchover and failover best practices page 4 for information about all of the oracle highavailability solutions and the benefits of faster data guard failover and switchover, refer to the oracle database high availability overview4. Oracle database failover and switchover oracle database server replication 10g, 9i, 11g.
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. Oracle database 10g automatic storage management asm is an integrated. A database can be in one of two mutually exclusive modes primary or standby. From the home page of the primary database click the availability link. He currently focuses on the internals of oracle text and oracle ultrasearch, and has worked with jsp, jdbc, plsql, and oci.
To achieve seamless data guard role transitions that involve a switchover. 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 is typically done for planned maintenance of the primary system. Oracle 12cstep by step manual switchover data guard switchover operation procedure. Data guard helps you change the role of a database using either a switchover or a failover. Switchover in 12c is still the same, but new features have been incorporated and. Oracle data guard concepts and administration 10g release 2 10. Switchover primary to standby in 10g deepakdbas blog. A s witchover is a role reversal between the primary database and one of its standby databases. Oraclebase data guard physical standby setup using the. A logical standby database looks like a perfect, quick solution to solve our problem that will avoid timeconsuming applicationdriven approaches. Oracle data guard 10g release 2 switchover and failover best practices. If you would like to perform this switchover using a manual method take a look at the post data guard switchover to a physical standby.
There are many examples, and ritesh chhajer offers this example of doing a data guard switchover using dgmgrl. Browse other questions tagged oracle 10g dataguard or ask your own question. The programs are not intended for use in any nuclear, aviation, mass transit, medical, or other inherently. I used your procedure flashback using restore point above to resetup our physical standby after our dr test and it worked like a charm. Manual switchover without dataguard in oracle dbametrix. Syed is an active oracle speaker, regularly presents technical sessions and webinars on various oracle database technologies at many oracle events. Sep 26, 2015 graceful switchover and switchback activity in dataguard on september 26, 2015, posted by tj, in oracle, by standby database, switchover and switchback standby, switchover in dataguard, with 1 comment. This document will detail the steps to perform a manual switchover. Database services are foundational to the application failover best practices described in this paper. Before you commit to switchover switchback tests, dont forget to make sure that primary and secondary databases are in synch. April 15, 2019 november 22, 2019 mehmet salih deveci 0 comments database tutorial, dataguard switchover, dataguard switchover ad.
My name is abhishek, i am oracle 9i, 10g, and 11g ocp certified dba. Performing switchover on oracle standby database db world. Its a nice doc for the switch over and switchback database. Switchover failover history data guard 10g mseberg dec 3, 2010 2. Unfortunately, we make use of functionbased indexes against heavilyreported tables in our oltp system, and have a desire to continue to use functionbased indexes in the future in our oltp system. This article is a repeat of the manual 11gr2 data guard setup described here, but here the data guard setup and administration is performed using the data guard broker. The oracle instance should be placed in archivelog mode before switching over the role.
Oracle data guard concepts and administration, 10g release 2 10. 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. Use data guard switchover to move production to asm 9. Oracle 10g data guard quick switchover with physical. Oracle data guard in oracle database 10g release 2 business continuity for the enterprise an oracle white paper november 2006. Dec 07, 2015 switchover in 12c is still the same, but new features have been incorporated and the usage of the switchover commands have in a great change. I have a standby configuration havim prim and standby database. I do provide training on below courses oracle 10g dba training oracle 10g 11g rac dba training oracle 10g data guard administration oracle 10g rman administration oracle 10g new. Best physical standby database for a failover operation. Switchover, failover physical standby database oracle. Oracle standby switchover oracle dba tips from expert remote dba team. Switchover is a two way process in oracle dataguard.
I have a scenario of oracle 10gr2 database replication using data guard. Were going to activate one of the standbys as primary, ditch the original primary and have the other 2 standbys feeding off the new primary. Graceful switchover and switchback for oracle standby database 10g manas mar 29, 2012 5. Switchover latent the switchover was in pending mode, but did not complete and went back to the primary database. Prerequisites for automating client failover jdbc, oci and. An oracle database expert for over 15 years from his 20 years of information technology it career. Oracle database 10g release 2 page 7 maximum availability architecture the broker automatically reinstates the old primary database if. Oracle 11g data guard switchover and switchback data guard. I have selected the data guard command line interface. The default value is 30 seconds and the lowest possible value is 10 seconds. Oracle data guard 10g release 2 switchover and failover best practices page 4. I am having 9 years of experiance as an oracle dba for production enviroment. Overview switchover on oracle data guard 11g youtube.
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