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. 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. Oracle data guard with oracle database 11g release 2. 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. 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. In this second part we will setup the standby database and enable fast start fail over. Oracle active data guard creates readonly environments, which prevent the use of native reporting tools with ebusiness suite databases created by this technology. This article gives an example of the setup and administration of data guard using the data guard broker.
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. Creating a physical standby using rman duplicate from. There are lot of opportunities from many reputed companies in the world. How to configure client failover for data guard connections using database services doc id 1429223.
How to troubleshoot an apply lag in a physical data guard. Sep 27, 2012 read data guard physical standby database best practices part i. Oracle data guard is the management, monitoring, and automation software infrastructure that creates, maintains, and monitors one or more standby databases to protect. 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.
The dsource in delphix is to follow the primary database from one target host to the other as a result of the failover. 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. Dgmgrl commands to configure and monitor an existing standby, including those. Data guard supports both physical standby and logical standby sites. Dataguardgapdetectionandresolution system and database. Oracle 11g data guard switchover and switchback data guard. Introduction data guard enables and automates the management of a disaster recovery solution. Aug 29, 2018 oracle recovery manager rman with examples. Describe the oracle database architecture components related to backup and recovery operations. 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. Data guard has options for multiple standby sites as well as an activeactive configuration.
User interfaces for administering oracle data guard configurations. For me, if mysql can do it, oracle can as well, but internet is not providing me the exact answer on it. Data guard maintains these standby databases as transactionally consistent copies of the production database. 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. In it, you have a minimum of two databases, primary and standby. An example of the oracle sql plus interface can be seen in figure 1. 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. Oraclebase data guard physical standby setup using the.
Oracle database and instance components dbarch video 3 duration. A new data guard broker property, redoroutes, is provided to facilitate redo transport configuration for advanced environments. This interview section questions contains a brief introduction to the orcle dba. 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. 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. Data guard concepts and administration contents oracle. Lsnrctl utility commands on both the primary and standby systems. Setting the data protection mode of a data guard configuration 5 19. If youre looking for oracle data guard interview questions for experienced or freshers, you are at right place. Oracle provides both graphical user interface gui and commandline cli tools for managing data guard configurations. Well organized training materials with easy to understand step by step explanation. 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.
Configuration of 10g data guard broker and observer for. Start the standby database instance in nomount start up mode. Oracle data guard maintains one or many secondary databases as alternatives to the primary production database. Use the data guard status metric to check the status of each database in the data guard configuration. Expert oracle university instructors will demonstrate how this solution protects your oracle database against planned and unplanned downtimes. 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. The oracle database sql language quick reference is intended for all users of oracle sql. How to configure client failover for data guard connections. According to research oracle data guard has a market share of about 0. Stepbystep configuration of data guard broker in oracle 11g. Schema based replication in oracle using data guard.
If a license for the oracle active data guard option has been purchased, redo apply can be active while the physical standby. A failover is performed using the data guard broker command line. 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. Primary database changes that require manual intervention at a physical.
See using oracle data guard for information and instructions. By default, a critical and warning threshold value was set for this metric column. Using recovery manager with oracle data guard in oracle10g. The standby databases will be always in sync with primary database.
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. Data guard physical standby database best practices part. Oct 11, 2017 fast sync is a new data guard capability available with oracle database 12c. By activeactive, it means bothall sites are up, running, and accessible. What are the advantages in using oracle data guard.
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. Data guard is the name for oracles standby database solution, used for disaster recovery and high availability. Fast sync enables use of the destination parameter noaffirm which specifies that the standby acknowledge receipt of redo without waiting. The discussions and examples in this manual use the data guard broker commandline. Data guard administration ed 1 training teaches you how to use oracle data guard. Oracle dba certification training online course database. Pre requisites include the use of 10g oracle server, using spfile on both the. Startup and open standby database startup commands. Explore how data guard standby databases can be used to support production functions such as reporting, querying and testing, while in a standby role. 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.
Dta guard is not more than transferring redo from primary site to secondary site. Disaster recovery a dataguard configuration consists of one primary database and one or more standby database. Manual recovery of archived redo log files in an archive gap. Data guard maintains these standby databases as copies of the production. 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. 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. Oracle corporation makes data guard available only as a bundled feature included within its enterprise edition of the oracle rdbms. This results in the existing primary db112 needing to be rebuilt as this site has been lost. Automatic gap detection and resolution in standby database. Oracle data guard, delphix dsources and managing dsource. 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. It is intended as a tutorial on the oracle, and commonly asked qestions in all interviews. Oracle database 11g administration workshop i vol 1pdfppt. Data guard is oracle 12cs true disaster protection technology.
Oracle data guard maintains the standby database by transmitting and applying redo data from the primary database. Commands for weekly tape backups using disk as cache. 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. 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.
Pages covering the newer functionality rac, data guard etc may appear in the future. Ss64 oracle discussion forum links to other sites, books etc. A database can be in one of two mutually exclusive modes primary or standby. Oct 06, 2014 steps to configure oracle 11g data guard physical standby active data guard parti published october 6, 2014 august 25, 2015 by jignesh jethwa here in this article i am going to cover steps by step approach to configure oracle 11g data guard physical standby. Data guard broker is part of the normal oracle database enterprise edition installation and an integral part of data guard. You can do data guard related configuration, set transport methods, apply setup and role change services and also change overall protection mode. Standby database technology in oracle is a powerful high availability solution. Oracle database 11g administration workshop ii vol 1pdfppt. A complete high availability and disaster recovery strategy requires dependable data backup, restore, and recovery procedures. Oracle database 11g introduces active database duplication which copies the live source database over the network without the need of an existing backup.
In the current release you cannot use physical migration methods like. The syntax on these pages is based on oracle version 9. Manual standby database under oracle standard edition. Oracle commands with example pdf this chapter presents the syntax for oracle sql statements. 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. Oracle recovery manager satisfies the most pressing demands of performant, manageable backup and recovery, for all oracle data formats.
Oct 29, 2017 hi every one, im new in oracle database. You can use the data guard commandline interface as an alternative to oracle enterprise manager for managing a data guard configuration. Oracle 11g dataguard manual disable solutions experts. Jan 07, 2018 45 videos play all oracle db online training tutorials point india ltd. Do your research, test, test, and test again on a development server. An oracle developer and dba since 1987, he has implemented largescale transaction processing systems and data warehouses. New data guard commandline interface dgmgrl commands include. You can edit the value for a threshold, as required. Following are the different benefits in using oracle data guard feature in your environment. Oct 08, 2014 in my previous article we have covered how to configured oracle 11g data guard on centos 6. 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.
Defines a unique name for the database to ensure uniqueness within an oracle data guard group a primary database and its standby databases. 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. 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. Apr 03, 2017 data guard gapdetectionandresolution overview. Oracle commands with example pdf oracle commands with example pdf download. Oracle data guard ensures high availability, data protection, and disaster recovery for enterprise data. 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.
Describe additional high availability features such as oracle data guard. Data guard is the name for oracle s standby database solution, used for disaster recovery and high availability. Queries executed on an active standby database return up todate. 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. Oracle database 11g administrator workshop pdf ppt. Oracle 12cstep by step manual data guard switchover. Data guard physical standby database best practices part ii. This topic is not applicable to exadata db systems. 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. 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 10g dbms has a number of interfaces for executing sql queries. In previous company, we did such thing easily with mysql free edition, but not sure is it possible with oracle. 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. Start the dmon process on both the primary and standby databases. Alerts will be generated when threshold values are reached. In the current release you cannot use physical migration methods like backuprestore, data guard. Data guard switch over with dgmgrl and sqlplus askmlabs.
I think i am getting close, however, this doesnt appear to turn of dataguard all together on the primary. Oracle database 11g administration workshop i vol 2pdfppt. Tip the standby databases in oracle cloud infrastructure database are physical standbys. Performing manual role changes when faststart failover is. As was the case in the backup based duplication, active duplication can be used to create a standby database. You will get full details on implementing deployment architectures to address requirements that extend beyond disaster recovery. At the moment my system has one primary database and one physical standby database. Steps to configure oracle 11g data guard physical standby.
Oracle data guard concepts and administration, 12c release 112. Administrators can chose either manual or automatic failover of production to a standby. You can manually configure data guard on exadata db systems using native oracle database utilities and commands, however this topic explains. The unique name defaults to the name specified in the dbname parameter. Cowritten by a team of oracle experts, oracle data guard 11g handbook provides a sound architectural foundation along with best practices for configuration, monitoring, maintenance, and troubleshooting. Data guard switch over with dgmgrl and sqlplus written by askmlabs on wednesday, december 7, 2011 5. Oracle data guard concepts and administration 11g release 2 11. Oracle 12cstep by step manual switchover data guard switchover operation procedure. Oracle database 11g dba handbook oracle database 9i sql fundamental workshop. Oracle data guard interview questions oracle dba interview.
Data guard is primarily about failureover in the event of a catastrophic loss of the primary site. Switchover and failover commands only require you to specify the target standby. 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. 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. Oracle database 11g administration workshop ii vol 2pdfppt. Dataguard commands and sql scripts valeh agayevs blog. The create table privilege, for example, lets you create tables. Changes in this release for oracle data guard broker. Oracle data guard concepts and administration oracle docs. 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. For the rman procedures in an oracle9i database configuration, refer to using recovery manager with oracle data guard in oracle9i 1. So, you still have opportunity to move ahead in your career in oracle development. Oracle 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.
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