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. Although the instances are shut down, the role change will be. Data guard is the name for oracle s standby database solution, used for disaster recovery and high availability. Use data guard switchover to move production to asm 9.
Data guard normally ships redo as it is generated, data guard does not normally wait for an archive redo log to fill up. Switchoverfailover history data guard 10g 808771 dec 3, 2010 4. In a switchover the primary database is transitioned to the standby role and the standby database is transitioned to the primary role. Graceful switchover and switchback for oracle standby database 10g manas mar 29, 2012 5. Dataguard 10g switchover question oraclel freelists. Please suggest or share any document where step by step mention. This document will detail the steps to perform a manual switchover. 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. Oracle data guard concepts and administration 10g release 2 10. For detailed best practices for the comprehensive use of. This is just a priimary database and its standby with no rac configured. During a switchover, the primary database transitions to a standby role and the standby database transitions to the. Oracle 12cstep by step manual data guard switchover.
Browse other questions tagged oracle 10g dataguard or ask your own question. 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. Oraclel dataguard 10g switchover question grokbase. Its a nice doc for the switch over and switchback database. Switchover to a physical standby using oracle enterprise. Oracle 11g data guard switchover and switchback data. Switchover primary to standby in 10g deepakdbas blog. An oracle database expert for over 15 years from his 20 years of information technology it career. 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. The default value is 30 seconds and the lowest possible value is 10 seconds. Switchover latent the switchover was in pending mode, but did not complete and went back to the primary database. Oracle data guard concepts and administration oracle docs. Oracle10goracle11g data guard switchover and switchback switchover and switchback are very important mechanisms to validate the integrity of oracle data guard configuration.
Oracle data guard in oracle database 10g release 2. Switchover and switch back oracle case studies, make it simple. Performing switchover with no broker manual overview. Oracle data guard 10g release 2 switchover and failover best practices. 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. The discussions and examples in this manual use the data guard broker.
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. 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. I just setup a primarystandby pair managed by dataguard broker and when i. Best physical standby database for a failover operation. Manual switchover standby database in oracle 10g find. 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 that we open new standby database mount mode. 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. Switchover, failover physical standby database oracle. On a previous document, 10g data guard, physical standby creation, step by step i did describe how to implement a data guard. After the switch, the primary will turn into the standby database and the standby into the primary. 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. A switchover is a role reversal between the primary database and one of its standby databases.
April 15, 2019 november 22, 2019 mehmet salih deveci 0 comments database tutorial, dataguard switchover, dataguard switchover ad. A switchover can be used to reduce downtime for planned outages such as patching to the database or host os and hardware upgrades. Installation of oracle 11g databases in production, development and test environments depending on project requirements. Switchover is a two way process in oracle dataguard. A s witchover is a role reversal between the primary database and one of its standby databases. A switchover guarantees no data loss and is typically done for planned maintenance of the. Resolution ddr team in oracle s server technology division.
Oct 08, 2014 in my previous article we have covered how to configured oracle 11g data guard on centos 6. I have an api server running in windows iis which connects to the primary database via oracle 11g client. Switchoverfailover history data guard 10g oracle community. The programs are not intended for use in any nuclear, aviation, mass transit, medical, or other inherently. Oracle 11g data guard switchoverfailover quick stepbystep. Apr 23, 2012 a switchover is a role reversal between the primary database and one of its standby databases. Faststart failover oracle data guard 10g release 2. 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. To achieve seamless data guard role transitions that involve a switchover. Oracle data guard in oracle database 10g release 2 business continuity for the enterprise an oracle white paper november 2006.
A switchover consists of the change of roles between the primary and standby database. Performing switchover on oracle standby database db world. 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. 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. Database services are foundational to the application failover best practices described in this paper. Standby databases before switchover to the new primary database.
Overview switchover on oracle data guard 11g duration. 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. Were have a primary and 3 physical standbys in arch mode. This is typically done for planned maintenance of the primary system. Configuration of 10g data guard broker and observer for. 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. Manual recovery of archived redo log files in an archive gap. Oracle 10g data guard quick switchover with physical. I have a standby configuration havim prim and standby database. 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.
Configure physical standby database oracle database 12c release 1 12. Jan 01, 2012 my purpose on this post is a quick stepbystep on how to perform a switchover on an oracle physical standby database. 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. I have selected the data guard command line interface. How to perform switchover in dataguard oracle database. Guard in the oracle data guard concepts and administration manual and on the. We usually recommend to use the broker and i wanted to see if the broker uses that new command or not. Syed is an active oracle speaker, regularly presents technical sessions and webinars on various oracle database technologies at many oracle events.
Oracle database failover and switchover oracle database server replication 10g, 9i, 11g. 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. There are many examples, and ritesh chhajer offers this example of doing a data guard switchover using dgmgrl. Manual switchover standby database in oracle 10g find the.
Switchover of physical standby database in 11g shivananda rao. Oracle standby switchover oracle dba tips from expert remote dba team. Switchover to physical standby database in oracle 11g. A database can be in one of two mutually exclusive modes primary or standby. 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. In my previous article we have covered how to configured oracle 11g data guard on centos 6. Switchover failover history data guard 10g mseberg dec 3, 2010 2. After my initial setup i can ship and apply logs from the primary database to the standby db. Prerequisites for automating client failover jdbc, oci and. 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. Oraclebase data guard physical standby setup using the. Using switchover operation we can convert physical standby database to primary and primary database to physical standby.
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. During a switchover, the primary database transitions to a standby role and the standby database. My name is abhishek, i am oracle 9i, 10g, and 11g ocp certified dba. Data guard switchover with dgmgrl burleson oracle consulting. So, primary database will operate as standby and standby will operate as primary database. Oracle 12cstep by step manual switchover data guard switchover operation procedure. 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. A manual failover would be required in order to execute a failover to any of the additional standby databases within the configuration. Overview switchover on oracle data guard 11g youtube.
The oracle instance can be in managed recovery mode or open for read only. A logical standby database looks like a perfect, quick solution to solve our problem that will avoid timeconsuming applicationdriven approaches. 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. 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. 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. Graceful switchover and switchback activity in dataguard. Performing a switchover to a physical standby database. Switchover in 12c is still the same, but new features have been incorporated and. Errors during databaguard broker switchover oracle community. Manual switchover without dataguard in oracle dbametrix. Oracle database 10g automatic storage management asm is an integrated. 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.
To primary this is a standby database, with no active sessions, that is allowed to switch over to a primary database. 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. 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. I am having 9 years of experiance as an oracle dba for production enviroment. Oracle 11g data guard switchover and switchback data guard.
Oracle license agreement, and, to the extent applicable, the additional rights set forth in far 52. Verify that the oracle instance is in archivelog mode. Oracle data guard concepts and administration, 10g release 2 10. Step by step switchover in 10g data guard how to perform. The best practices described in this paper require oracle database 12. Oracle data guard in oracle database 10g release 2 business. If the database is open for query, the switchover operation will take longer to complete. 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. 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.
In this article, i will write about how to switchover from the previous article scenario. Oracle10goracle11g data guard switchover and switchback. I have a scenario of oracle 10gr2 database replication using data guard. For complete details on doing a data guard switchover, see the book oracle data guard by bipul kumar. Dgmgrl shows that configuration and databases have been set with success. If you are using oracle enterprise manager 11gr1 grid control the switchover can be accomplished in just a few mouse clicks. Performing a switchover to a physical standby database note. I used your procedure flashback using restore point above to resetup our physical standby after our dr test and it worked like a charm. Oracle data guard 10g release 2 switchover and failover best practices page 4.
She is an oracle 10g certified professional and 9i certified associate. Oracle database 10g release 2 page 7 maximum availability architecture the broker automatically reinstates the old primary database if. He currently focuses on the internals of oracle text and oracle ultrasearch, and has worked with jsp, jdbc, plsql, and oci. Nitin is a wellknown oracle technologist and speaker in the areas of oracle storage, high availability, oracle rac, and private database cloud. About author hailie jiao works as oracle dba at baltimore, maryland. From the home page of the primary database click the availability link. Article i had written previously was the creation standby database with rman active database duplication. I have two oracle 11g r2 databases on separate servers primaryphysical standby with data guard configured to switch over between the two. Before you commit to switchover switchback tests, dont forget to make sure that primary and secondary databases are in synch. Data guard helps you change the role of a database using either a switchover or a failover. Primary database may need downtime for many reasons like os upgradation, hardwares upgradation and for many other issues.
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