The data guard commandline interface dgmgrl enables you to manage a data guard broker configuration and its databases directly from the command line, or from batch programs or scrip ts. The data guard commandline interface dgmgrl enables you to manage a data guard broker configuration and its various members directly from the command line, or from batch programs or scrip ts. 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. Lsnrctl utility commands on both the primary and standby systems. Data guard physical standby database best practices part 1 oracle data guard is one of the software solutions provided by oracle corporation to maximize high availability of oracle databases. How to configure client failover for data guard connections using database services doc id 1429223. Start the dmon process on both the primary and standby databases.
Oracle database 11g dba handbook oracle database 9i sql fundamental workshop. Chapter 8 backup and recovery and data guard 201 rman disktodisk backups 202 settings for rman backups on the exadata 203 rman2disk shell script 204 rman2disk template files 206 using rman2disk 206 creating rman backups 209 rman backup schedule 2 container and pluggable databases 215 data guard 216 patches 217 session data unit 217. In previous company, we did such thing easily with mysql free edition, but not sure is it possible with oracle. Oracle active data guard creates readonly environments, which prevent the use of native reporting tools with ebusiness suite databases created by this technology. Gain an understanding of the oracle database cloud service describe oracle database backup methods and recovery operations that can be used to resolve database failure. The standby databases will be always in sync with primary database. Startup and open standby database startup commands. Data guard is the name for oracles standby database solution, used for disaster recovery and high availability. Primary database changes that require manual intervention at a physical. If the primary database becomes unavailable, then you can use oracle data guard to switch or fail over the standby database to the primary role. Data guard however provides for continuity of operations if the room in which your rac cluster resides goes away fire, flood, explosion, whatever data guard is somewhere else, ready to take over. Performing manual role changes when faststart failover is.
For me, if mysql can do it, oracle can as well, but internet is not providing me the exact answer on it. Data guard supports both physical standby and logical standby sites. A database can be in one of two mutually exclusive modes primary or standby. Introduction data guard enables and automates the management of a disaster recovery solution. Data guard is the name for oracle s standby database solution, used for disaster recovery and high availability. Dataguardgapdetectionandresolution system and database. This results in the existing primary db112 needing to be rebuilt as this site has been lost. Disaster recovery a dataguard configuration consists of one primary database and one or more standby database.
Sep 27, 2012 read data guard physical standby database best practices part i. Expert oracle university instructors will demonstrate how this solution protects your oracle database against planned and unplanned downtimes. Oracle data guard maintains the standby database by transmitting and applying redo data from the primary database. To sync up the additionalincremental changes on the source database during the exportimport process you can use goldengate or goldengate cloud service to replicate those changes to adb. The syntax on these pages is based on oracle version 9. Oracle data guard with oracle database 11g release 2. Data guard data guard provides the management, monitoring, and automation software to create and maintain one or more synchronized copies of a production database to protect oracle data from failures, disasters, human error, and data corruptions while providing high. Apr 03, 2017 data guard gapdetectionandresolution overview.
Creating a physical standby using rman duplicate from. There are lot of opportunities from many reputed companies in the world. Schema based replication in oracle using data guard. The oracle database sql language quick reference is intended for all users of oracle sql. Changes in this release for oracle data guard broker. Oracle data guard is the management, monitoring, and automation software infrastructure that creates, maintains, and monitors one or more standby databases to protect.
Knowing the most common tasks an oracle database administrator dba encounters and what a dba needs to monitor daily can help keep your database running and wellmaintained. Data guard physical standby database best practices part ii. Dta guard is not more than transferring redo from primary site to secondary site. If you use oracle data guard and not oracle active data guard for your ebs disaster recovery instance, then the dr site can be used for reporting purposes. Ss64 oracle discussion forum links to other sites, books etc. Data guard maintains these standby databases as transactionally consistent copies of the production database. Setting the data protection mode of a data guard configuration 5 19. Oracle data guard concepts and administration, 12c release 112. A data guard configuration may be managed by using either sqlplus, or data guard brokers commandline interface dgmgrl, or oracle enterprise manager 10g grid control.
New data guard commandline interface dgmgrl commands include. Data guard administration ed 1 training teaches you how to use oracle data guard. Explore how data guard standby databases can be used to support production functions such as reporting, querying and testing, while in a standby role. Oracle corporation makes data guard available only as a bundled feature included within its enterprise edition of the oracle rdbms. Well organized training materials with easy to understand step by step explanation.
How to configure client failover for data guard connections. Oracle data guard maintains one or many secondary databases as alternatives to the primary production database. Data guard administration training helps you develop the skills to use oracle data guard to help protect your oracle database against planned and unplanned downtime. You can manually configure data guard on exadata db systems using native oracle database utilities and commands, however this topic explains. You can use the data guard commandline interface as an alternative to oracle enterprise manager for managing a data guard configuration. Using recovery manager with oracle data guard in oracle10g. Data guard maintains these standby databases as copies of the production. By default, a critical and warning threshold value was set for this metric column. Dgmgrl commands to configure and monitor an existing standby, including those. So, you still have opportunity to move ahead in your career in oracle development.
Oracle data guard interview questions oracle dba interview. Oct 11, 2017 fast sync is a new data guard capability available with oracle database 12c. This command does not remove or affect the actual primary or standby database instances, databases, far sync instances, data files, control files, initialization parameter files, server parameter files, or log files of the underlying oracle data guard configuration. For the rman procedures in an oracle9i database configuration, refer to using recovery manager with oracle data guard in oracle9i 1. Data guard has options for multiple standby sites as well as an activeactive configuration. Fast sync enables use of the destination parameter noaffirm which specifies that the standby acknowledge receipt of redo without waiting. This article gives an example of the setup and administration of data guard using the data guard broker. 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. This interview section questions contains a brief introduction to the orcle dba. You can do data guard related configuration, set transport methods, apply setup and role change services and also change overall protection mode. The first annoying thing is that data guard broker has not been configured so i will use only sql commands but reaching conclusion with dg broker is much simpler if you are here you know what is data guard, the official oracle high level picture is below one. Data guard provides a comprehensive set of services that create, maintain, manage, and monitor one or more standby databases to enable production oracle databases to survive disasters and data corruptions. Oracle database 11g administration workshop i vol 2pdfppt.
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. The unique name defaults to the name specified in the dbname parameter. Oracle database and instance components dbarch video 3 duration. Tip the standby databases in oracle cloud infrastructure database are physical standbys. If a license for the oracle active data guard option has been purchased, redo apply can be active while the physical standby. Data guard switch over with dgmgrl and sqlplus askmlabs. Aug 29, 2018 oracle recovery manager rman with examples. Commands for weekly tape backups using disk as cache. You can use the data guard commandline interface as an alternative to oracle enterprise manager cloud control cloud control for managing a data guard configuration. Oracle database 11g administration workshop i vol 1pdfppt. Data guard is oracle 12cs true disaster protection technology. T o use dgmgrl, the best practice is to install the oracle enterprise edition or personal edition database software on each location you expect to include in broker.
Standby database technology in oracle is a powerful high availability solution. At the moment my system has one primary database and one physical standby database. If youre looking for oracle data guard interview questions for experienced or freshers, you are at right place. Pre requisites include the use of 10g oracle server, using spfile on both the. You can edit the value for a threshold, as required. Oracle data guard concepts and administration 11g release 2 11. Oraclebase data guard physical standby setup using the. Jan 07, 2018 45 videos play all oracle db online training tutorials point india ltd. Oracle active data guard enables readonly access to a physical standby database for queries, sorting, reporting, webbased access, and so on, while continuously applying changes received from the production database. In the current release you cannot use physical migration methods like backuprestore, data guard. Nov 17, 2011 stepbystep configuration of data guard broker in oracle 11g as we have already discuss about the data guard broker and its benefits in earlier post. Use the data guard status metric to check the status of each database in the data guard configuration. Configuration of 10g data guard broker and observer for.
Start the standby database instance in nomount start up mode. Kevin loney, director of data management for a major financial institution, is an internationally recognized expert in the design, development, administration, and tuning of oracle databases. The dsource in delphix is to follow the primary database from one target host to the other as a result of the failover. Dba commands users, roles and privileges an oracle role is a set of privileges or the type of access that each user needs depending on his or her status and responsibilities database system privileges let you execute specific sets of commands. Describe the oracle database architecture components related to backup and recovery operations. Prior to oracle database 11g duplication was performed from an existing rman backup. The discussions and examples in this manual use the data guard broker commandline. Oracle commands with example pdf this chapter presents the syntax for oracle sql statements.
A new data guard broker property, redoroutes, is provided to facilitate redo transport configuration for advanced environments. You will get full details on implementing deployment architectures to address requirements that extend beyond disaster recovery. March 12, 2020 mehmet salih deveci 0 comments data guard broker commands, data guard broker parameters, data guard configuration steps in oracle 11gr2, dataguard in oracle 11g, dgmgrl add database as physical standby, dgmgrl commands, dgmgrl configuration, dgmgrl connect as sysdba without password, dgmgrl shell script, dgmgrl switchover, how to. I think i am getting close, however, this doesnt appear to turn of dataguard all together on the primary. Oracle database 11g administration workshop ii vol 1pdfppt. Oracle recovery manager satisfies the most pressing demands of performant, manageable backup and recovery, for all oracle data formats. In it, you have a minimum of two databases, primary and standby. The oracle 10g dbms has a number of interfaces for executing sql queries. The create table privilege, for example, lets you create tables.
I have just built one more standby physical database and i want to configure data guard and related configuration to sync data from primary server to both standby servers. Oracle data guard ensures high availability, data protection, and disaster recovery for enterprise data. The most basic interface, known as the oracle sql plus interface, is used to directly execute sql commands such as those you will have learnt about in chapter 8, introduction to structured query language. A complete high availability and disaster recovery strategy requires dependable data backup, restore, and recovery procedures. How to troubleshoot an apply lag in a physical data guard. Data guard switch over with dgmgrl and sqlplus written by askmlabs on wednesday, december 7, 2011 5.
By activeactive, it means bothall sites are up, running, and accessible. Data guard broker is part of the normal oracle database enterprise edition installation and an integral part of data guard. User interfaces for administering oracle data guard configurations. In the current release you cannot use physical migration methods like. This topic is not applicable to exadata db systems. Oracle commands with example pdf oracle commands with example pdf download. What are the advantages in using oracle data guard. Data guard is primarily about failureover in the event of a catastrophic loss of the primary site.
Oracle data guard concept oracle data guard is one of the most effective and comprehensive data availability, data protection and disaster recovery solutions available today for enterprise data. This paper provides examples that illustrate data guard broker dgmgrl commands and best practices used to manage and configure a variety of active data guard configurations that make use of these new features. See using oracle data guard for information and instructions. Oct 29, 2017 hi every one, im new in oracle database. According to research oracle data guard has a market share of about 0.
Oracle data guard concepts and administration oracle docs. Data guard concepts and administration contents oracle. Automatic gap detection and resolution in standby database. Following are the different benefits in using oracle data guard feature in your environment. Administrators can chose either manual or automatic failover of production to a standby. In this second part we will setup the standby database and enable fast start fail over. An oracle developer and dba since 1987, he has implemented largescale transaction processing systems and data warehouses. A failover is performed using the data guard broker command line. Stepbystep configuration of data guard broker in oracle 11g.
Oracle 12cstep by step manual data guard switchover. Oracle 11g data guard switchover and switchback data guard. Manual standby database under oracle standard edition. Describe additional high availability features such as oracle data guard. Steps to configure oracle 11g data guard physical standby. Oracle provides both graphical user interface gui and commandline cli tools for managing data guard configurations. Do your research, test, test, and test again on a development server. Data guard physical standby database best practices part. The quick start deploys the oracle primary database using the preconfigured, generalpurpose starter database from oracle on an ec2 instance in the first availability zone. Oracle data guard, delphix dsources and managing dsource. It is intended as a tutorial on the oracle, and commonly asked qestions in all interviews.
Oct 08, 2014 in my previous article we have covered how to configured oracle 11g data guard on centos 6. Oracle dba certification training online course database. Oracle 11g dataguard manual disable solutions experts. Pages covering the newer functionality rac, data guard etc may appear in the future. Switchover and failover commands only require you to specify the target standby.
Oracle database 11g administrator workshop pdf ppt. Note 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 on production. An archive gap is a range of missing archived redo logs created whenever the standby system is unable to receive the next archived redo log generated by the primary db. Defines a unique name for the database to ensure uniqueness within an oracle data guard group a primary database and its standby databases. Oracle 12cstep by step manual switchover data guard switchover operation procedure. Dataguard commands and sql scripts valeh agayevs blog. An example of the oracle sql plus interface can be seen in figure 1.
It then sets up a second ec2 instance in a second availability zone, copies the primary database to the second instance, and configures oracle data guard. Alerts will be generated when threshold values are reached. Queries executed on an active standby database return up todate. These are the oracle data guard broker changes in oracle database release 19c you can dynamically change the faststart failover target to a specified member in the list without disabling faststart failover.