Data guard has options for multiple standby sites as well as an activeactive configuration. Data guard, physical standby creation, step by step. Flash recovery area, a single filesystem or asm disk group to organize and manage database recovery related files such as backups and archived logs. The manual switch over steps were tested in oracle 11. On the physical standby database, the following checks should be performed before starting the switchover operation. Oracle 12cstep by step manual data guard switchover. A switchover allows the primary database to switch roles with its standby database. Data guard switchover with dgmgrl burleson oracle consulting. Hi all, we have 10g database primary and standby, i never worked before standby, client want me start switch over, can you please let me know how to perform switchover in 10g. Switchover to physical standby database in oracle 11g.
After a switchover, each database continues to participate in the oracle data guard configuration in its new role. Immediately after issuing command in step 2, shut down and restart the former primary instance prim. Initially a small setup, it has been growing very quickly. For a backupbased duplicate, or a manual restore, take a backup of the primary database. Use data guard switchover to move production to asm. Data guard switchover to a physical standby oracle distilled. Oracle data guard 10g release 2 switchover and failover best practices. Using recovery manager with oracle data guard in oracle database 10g page 5 the standby database is a physical standby database and backups are only taken on the standby database. After my initial setup i can ship and apply logs from the primary database to the standby db. Comparing data guard faststart failover and manual failover. Allows the primary database to switch roles with one of its standby databases. Oracle 11g data guard switchover and switchback active. So there is problem in entire dataguard configuration, use this below snapper script. The step by step instructions are contained on this document.
Oracle data guard standby databases overview dg video. 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. Changes in this release for oracle data guard concepts and administration changes in oracle database 12c release 2 12. By default, a critical and warning threshold value was set for this metric column. Switchover steps for physical standby databases 15. Data guard 11g transport is very efficient, it is the only database replication method that does not require any capture processing, database access or disk io at the primary database. In oracle database 10g, rman offers new features for the data guard configuration, including. Changes in this release for oracle data guard concepts and administration changes in oracle database 12c release 1 12. This document describes how to setup clients to connect to data guard databases primary and standby and configure automatic client failover such. Oracle data guard concepts and administration oracle help center. A database can be in one of two mutually exclusive modes primary or standby. You can edit the value for a threshold, as required. Data guard, broker, observer and switchover, step by step.
This document will detail the steps to perform a manual switchover. Linux above systems are installed on exadata machine with active data guard. A switchover guarantees no data loss and is typically done for planned maintenance. Switchover operations involving a physical standby database. Oraclebase data guard physical standby setup using the. Data guard is the name for oracle s standby database solution, used for disaster recovery and high availability. To enable oracle data guard 10g, perform the following steps. If there is no match then you will correct the temp tbs problem after switchover. For a smooth role transition, it is important to have everything inplace and in sync. Oracle10goracle11g data guard switchover and switchback. It allows readonly access on the physical standby node at the same time as applying archived transactions from the primary node. Oraclebase data guard physical standby setup in oracle. Data guard physical standby setup in oracle database 11g release 2. Stepbystep instructions for creating a logical standby database.
Oracle white papersetting up oracle 11g data guard for sap customers efficient utilization of system resources 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. For detailed best practices for the comprehensive use of. Pre requisites include the use of 10g oracle server, using spfile on both the. Oracle data guard supports the following role transitions. Oracle 10g data guard quick switchover with physical.
Few years ago we have chosen oracle rac 10g on linux, on nonbranded hardware as our main platform. Dataguard configuration physical standby database with real time apply. Oracle 12cstep by step manual data guard switchover oracledbwr. Manual switchover standby database in oracle 10g find. Faststart failover is an oracle data guard 10g release 2 1 feature that automatically.
Configuration of 10g data guard broker and observer for switchover. Switchover operation on oracle data guard 11g youtube. Hi, i will explain you to perform switchover in oracle dataguard in this article. Faststart failover oracle data guard 10g release 2. Published october 17, 2014 august 25, 2015 by jignesh jethwa. Oracle data guard helps you change the role of a database using either a switchover or a failover. Oracle database switch over and failover steps switchover and failover for oracle rac database using physical standby. There are many examples, and ritesh chhajer offers this example of doing a data guard switchover using dgmgrl. 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. The oracle active data guard option, an extracost facility, extends oracle data guard functionality in oracle 11g configurations.
Switchover and switchback are very important mechanisms to validate the integrity of oracle data guard configuration. The two databases make an oracle data guard association. In this video you will learn about the different types of standby databases in an oracle data guard environment. However, with oracle 12c, this is simplified with the alter database switchover verify command. Oracle data guard 10g release 2 switchover and failover best practices page 6 minutes to enable reinstantiation after a failover default value is 1440 minutes. In this video, you will learn how to perform switchover operation on oracle data guard 11g. If you are using oracle database 10g release 1, you will have to shut down and restart the new primary database stan. Configuration of 10g data guard broker and observer for. Manas, refer switchover failover best practices pdf from oracle maa. After configuring data guard, databases would be either primary and standby database role, and we can altered these roles. This article contains an updated version of the 9i physical standby setup method posted here.
Good knowdledge in oracle 8i,9i, 10g,11g,rac,dataguard. Primary database changes that require manual intervention at a physical standby. Manual recovery of archived logs in an archive gap. We have primary and two standby database on this data guard environment. Dgmgrl shows that configuration and databases have been set with success. My customer did not want to enable fast start failover but to leave the decision to failover in case of a major crash to the management team.
Primary database may need downtime for many reasons like os upgradation, hardwares upgradation and for many other issues. In a data guard environment you have primary database which is open in read write mode and the standby database which can be in mount mode or open in read only mode for reporting purpose. Performing a switchover to a physical standby database. The oracle cloud infrastructure database data guard implementation requires two databases. To set up a physical standby database, please refer to my orafaq blog oracle 10g manually create a physical standby database using data guard. 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 is oracle 12cs true disaster protection technology.
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. Oracle 11g physical standby data guard failover steps active data guard partv. I have selected the data guard command line interface. Connect with primary database and initiate the switchover c. Oracle data guard with oracle database 11g release 2. Data guard enables you to change these roles dynamically by issuing the sql statements described in this chapter, or by using either of the data guard brokers interfaces. This can also be done via the enterprise manager grid control gui as well and the assumption is that there is a physical standby database in place and redo transport and redo apply have already been configured and that both the primary and standby database. I have a scenario of oracle 10gr2 database replication using data guard.
Before you commit to switchover switchback tests, dont forget to make sure that primary and secondary databases are in synch. Oracle data guard ensures high availability, data protection, and disaster recovery for enterprise data. In it, you have a minimum of two databases, primary and standby. Alerts will be generated when threshold values are reached. Once you have your primary database up and running these are the steps to follow. You will get to know the typical use cases in which you would use each type of. Using oracle data guard oracle cloud infrastructure. In case of worst situation with data guard primary database, or not available for production than we can activated standby database as a primary. A switchover is typically used to reduce primary database downtime during planned outages, such as operating system or hardware upgrades, or rolling upgrades of the oracle database software and patch sets. Dataguard configuration physical standby database with. Data guard broker permit to manage a data guard configuration, from both the enterprise manager grid control console, or from a terminal in command line mode. Data guard is the name for oracles standby database solution, used for. This time i did focus on configuring data guard broker, the observer and implement switchover from the primary to the standby and back.
Pre oracle 12c, a set of commands used on primary and standby to validate the readiness of the systems. Physical standby database creation, step by step c. Data guard must use spfile, in order to configure it we create and configure the standby parameters on a regular pfile, and once it is ready we. By activeactive, it means bothall sites are up, running, and accessible. Data guard for manual failover, step by step oracle. Oracle 11g physical standby data guard failover steps. Oracle 12cstep by step manual switchover data guard. Data guard physical standby setup using the data guard broker in oracle database 12c release 1. For complete details on doing a data guard switchover, see the book oracle data guard by bipul kumar. Oracle data guard concepts and administration, 10g release 2 10. In my previous article we have covered how to configured oracle 11g data guard on centos 6.
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