Following a failover or switchover to the local standby database, the remote standby database in such a configuration will automatically recognize that a role transition has occurred and begin receiving redo from the new primary database maintaining dr protection at a ll times. Ora169 physical standby with a switchover status of. Mrp or lsp process of standby database will apply those redo in standby database. If this is an oracle rac physical standby database, the broker directs crs to restart the instances that were shut down prior to the switchover.
During a switchover, the primary database transitions to a standby role, and the standby database transitions to the primary role. Oct 08, 2014 in my previous article we have covered how to configured oracle 11g data guard on centos 6. A redo apply standby database physical standby is created on. Oracle white papersetup flashback database on data guard physical standby database for sap customers 2 preface many studies show that 40% of application outages are caused by operator or user errors. Switchover to a physical standby using the data guard command. Oct 28, 2014 to say oracle data guard, at least two or more databases should be involved, one designated as primary database and the other standby database either it can be physical or logical standby or snapshot standby database. A logical standby database is an independent database. To shut down a physical standby database, use the sqlplus shutdown command.
In this article, i will write about how to switchover from the previous article scenario. There are many ways to set up an oracle physical standby system. Jun 07, 2010 for information on performing a switchover using oracle enterprise manager see the post switchover to a physical standby using oracle enterprise manager 11gr1 grid control. Configuration of 10g data guard broker and observer for. After my initial setup i can ship and apply logs fr.
On the physical standby database, the following checks should be performed before starting the switchover operation. Data guard faststart failover was introduced in oracle database 10g release 2 along with significant. View switchover and failover best practices oracle data guard 10g release 2. A switchover allows the primary database to switch roles with its standby database. Quick guide to configuring oracle 11gr2 data guard. Oct, 2017 lets walk through the primary and standby database alert. As was the case in the backup based duplication, active duplication can be used to create a standby database. He has been working with oracle database since 1997 and is an oracle certified professional for 9i, 10g, and 11g database. 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. Quick guide to configuring oracle 11gr2 data guard physical. This section will detail the stepbystep procedure for failover operation to the physical and logical standby database. A database running in the physical standby role after the switchover but prior to the flashback will still be running in the physical standby database role after the flashback database operation.
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. Oracle data guard in oracle database 10g disaster recovery. 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. Switchover and failover best practices oracle data guard. Dataguard configuration physical standby database with real.
Switchover operation can perform without dataguard and with dataguard. Pdf data guard is one of the high availability, disaster recovery and data. In this article, let us do the two node rac to rac manual switchover steps. So, primary database will operate as standby and standby will operate as primary database. To set up a physical standby database, please refer to my orafaq blog oracle 10g manually create a physical standby database using data guard. Oracle data guard concepts and administration, 10g release 2 10. Configuring oracle 10g rac standby for rac primary on linux.
Restarts the new standby former primary database if the switchover occurs with a physical standby database, and redo apply begins applying redo data from the new primary database. A switchover is a technique through which the roles reversal is possible between the primary database and standby database. Switchover from primary database to physical standby. Oracle active data guard option for physical standby databases. Step 5 switch the physical standby database role to the primary role. For logical standby databases, refer to oracle 10g sql apply maa best practices 6 to obtain an optimal sql apply rate. Data guard switchover failover to standby the standby database will be activated to serve as the primary database at some point in its life cycle. This article contains an updated version of the 9i physical standby setup method posted here. Performing manual role changes when faststart failover is enabled 5 24. I have selected the data guard command line interface. Configure physical standby database oracle database 12c release 1 12. Use sql commands to create a logical standby database switchover and failover. Oracle database 11g introduces active database duplication which copies the live source database over the network without the need of an existing backup.
Next we need to prepare the original standby and convert it to the new. Here we can see how to perform switchover operation without dataguard configuration. Using switchover operation we can convert physical standby database to primary and primary database to physical standby database in oracle. I have a scenario of oracle 10gr2 database replication using data guard. Oracle 10g high availability data guard and maximum availability.
Step by step oracle 11gr2 rac standby database switchover. Data guard physical standby setup using the data guard broker in oracle database 11g release 2. If the database is performing managed recovery, you must cancel managed recovery operations before issuing the shutdown command. Switchover and failover best practices oracle data guard 10g. Step by step oracle 11gr2 rac standby database switchover description. In the whole activity, there is no data loss occur on both sides. Switchover from primary database to physical standby database. You can use the physical standby database to offload the database backup operation from the primary database because a physical standby database is a copy of the primary database. For detailed best practices for the comprehensive use of. Reinstatement of failed primary database after a manual or automatic failover has occurred.
Creating a dataguard broker configuration using dgmgrl in. This paper focuses on the oracle database 10g architecture that makes use of the. We will now examine the process of switchover andor failover to the standby database. This document explains the step by step process of building 10g r2 10. The broker configuration file is updated to reflect the change in. We are going to switch the role of the primary database and a standby database using the switchover command the state of the primary and standby databases are transporton and applyon standby redo log files are configured on the primary database. A snapshot standby database receives and archives, but does not apply, redo data from a primary database. A redo apply standby database physical standby is created on a separate system running. It also covers the steps of converting physical standby database into logical standby database and at the end it shows the process of configuring the dataguard broker. I have an api server running in windows iis which connects to the primary database via oracle 11g client. Oracle data guard allows you to change the database role depending on the requirement from primary to standby and vice versa. You can switch a physical standby database from the standby role to the primary role when the standby database instance is either mounted in managed recovery mode or open for readonly access. We usually recommend to use the broker and i wanted to see if the broker uses that new command or not.
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. I have played with physical and logical standby database. Oracle 11g data guard switchover and switchback data. Oracle data guard concepts and administration oracle help center.
Istilah database oracle yang sering kita pakai itu merujuk pada database management system. Article i had written previously was the creation standby database with rman active database duplication. Oracle 10g manually create a physical standby database. Set up and manage oracle data guard using oracle enterprise. After your testing is completed, you can now convert it back to the physical standby database by clicking on the convert button. Oracle 12cstep by step manual switchover data guard switchover operation procedure. Oracle data guard in oracle database 10g release 2. This article presents switchover and failover methods available for physical standby database in oracle database 12c release 1. 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. A novel approach of using data guard for disaster recovery. Administrasi physical standby db setelah semua persiapan beres dan. Dataguard configuration physical standby database with real time apply. Performing a switchover to a physical standby database note. Oracle 11gr2 data guard physical standby part ii author.
If the switchover transitions a physical standby database to the primary role, then. Oracle data guard 10g release 2 switchover and failover best practices. This is typically done for planned maintenance of the primary system. Using physical standby as primary database after flashback 17. Oracle 10g data guard is a great tool to ensure high availability, data protection and disaster recovery for enterprise data. Manual switchover standby database in oracle 10g find the. Oracle data guard broker oracle database online documentation. A database can be in one of two mutually exclusive modes primary or standby. For a backupbased duplicate, or a manual restore, take a backup of the primary database. Oracle 12cperforming dataguard switchover using dgmgrl utilitydescription. Prior to oracle database 11g duplication was performed from an existing rman backup. Manual failover gives you control over exactly when a failover occurs and to. Only the oracle database 10g with data guard, and the oracle database 10g with rac.
Ora169 physical standby with a switchover status of not. A switchover is a role reversal between the primary database and one of its standby databases. Flashback on primary useful however not necessary to test failover. Fail over, switch over, primary or secondary database, high. Once you have your primary and standby databases up and running these are the steps to follow. Let us consider, we have already configured primary site with two node rac and standby site also with two node rac in 11gr2. Oraclebase data guard physical standby setup using the. Force a log switch on the primary database and examine the alert logs on both the primary database and physical standby database to ensure the archived redo log file sequence numbers are correct. A physical standby database has ondisk database structures that are identical to the primary database on a blockforblock basis, and is updated using oracle media recovery.
Setup flashback database on data guard physical standby. 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. Oracle 12cperforming dataguard switchover using dgmgrl. Adidas has deployed oracle data guard 1 for disaster recovery. Oracle database with oracle clusterware cold cluster failover. Pdf role of oracle active data guard in high availability. Performing manual role changes when faststart failover is enabled 524. Core operating tasks switchover, failover,reinstate, faststart failover, etc. This is just a priimary database and its standby with no rac configured. A logical standby database is an independent database that. At the time of switchover activity, the primary database becomes the standby database and viceversa. Oracle 11g data guard switchover and switchback data guard.
Turn two oracle 11 databases that were primary physical standby into standalone standalone. Stepbystep instructions on how to create a physical standby database on windows and unix servers, and maintenance tips on the databases in a data guard environment. If a symmetrical initialization parameter file is not being used, update the initialization parameter file on the physical oracle instance to include all other standby databases and the original primary database as the log. Creating a physical standby using rman duplicate from active. Using rman at the standby site, you can back up the datafiles and the archived redo logs while the standby database is performing managed recovery. Upgrade oracle clusterware from oracle database 10g to oracle database 11g. Performing a switchover to a physical standby database. 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. Data guard physical standby setup in oracle database 11g. Oracle data guard in oracle database 10g release 2 business. Jul 26, 2018 the environment was two sets of 4 node racs each running oracle 11.
If the switchover involved a logical standby database, flashing back changes the role of the standby database to what it was at the target scn or time. Data guard physical standby setup in oracle database 11g release 2. 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. There are normally two situations when this operation will be performed. Oracle data guard with oracle database 11g release 2. Waiting for target standby to receive all redo 20200227t19. Converting a physical standby to a snapshot standby. Oracle 8i oracle 9i oracle 10g oracle 11g oracle 12c oracle c oracle 18c oracle 19c oracle 21c. Switchover from primary database to physical standby database using oracle standard edition 10. I have two oracle 11g r2 databases on separate servers primary physical standby with data guard configured to switch over between the two. Data guard is the name for oracle s standby database solution, used for disaster recovery and high availability.
Sql alter database commit to switchover to primary. Jed walker is the manager of database operations for the comcast media center in centennial colorado. Switchover, failover physical standby database oracle. Physical standby database takes the redo data from primary. 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. Jul 09, 2011 a snapshot standby database is a fully updatable standby database that is created by converting a physical standby database into a snapshot standby database. Oracle 10g data guard quick switchover with physical. Manual failover can be accomplished by using oracle enterprise manager. Mar 06, 2010 creating a dataguard broker configuration using dgmgrl in oracle 10g intro though grid control offers a graphical interface for much more than just configuring a high availability database, sometimes its installation maybe considered a huge overhead.
Jun 03, 2018 mrp or lsp process of standby database will apply those redo in standby database. During the switchover to a physical standby the broker performs the following. Pdf buku pegangan oracle database administrator suko widdy. A guaranteed restore point is created on the original primary for purposes of flashing back to become a physical standby post switchover. You can refer here, for two node rac to rac dataguard setup in 11gr2 and also we are using the same configuration from the. Step by step procedure page 5 2 introduction a physical standby database is physically identical to the primary database, with on disk database structures that are identical to the primary database on a blockforblock basis. Oracle 12cstep by step manual data guard switchover. Manual intervention to recreate a new standby database. Switchover to a physical standby using the data guard. With or without broker, data guard manager, in different modes e.
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