Ok, here is how my license speailist put it, data guard as a product is free, however the database instance is not. Quick oracle dataguard check script posted on january 5, 2009 by ludovico oracle dataguard has his own commandline dgmgrl to check the whole dataguard configuration status. It allows readonly access on the physical standby node at the same time as applying archived transactions from the primary node. Using a separate network for dataguard in 12c rac marco. I really only did the 11g one in case thats the route this project goes. Oracle data guard introduction oracle data guard is the management, monitoring, and automation software infrastructure that creates, maintains, and monitors one or more standby databases to protect enterprise data from failures, disasters, errors, and corruptions. Oct 18, 20 at this point we consider data guard at one physical location. Oracle data guard ensures high availability, data protection, and disaster recovery for enterprise data.
Add the standby database and its instances to the ocr so that it is managed by crs. Unsubscribe from prasad mynumpati dba technologies. Oracle data guard is the management, monitoring, and automation software infrastructure that creates, maintains, and monitors one or more standby databases to protect enterprise. Unlike some mediocre oracle data guard training, this course examines all oracle data guard features with an eye on those features that are the most important to you. Using data guard sql apply, oracle dba will be able to perform a rolling upgrade of the oracle database software from patch set release n minimally, this must be release 10. Oracle data guard with oracle database 11g release 2. Here, in these documents, i show you guys step by step dataguard steup and configuration which i have done in my real time environments. This chapter provides an overview of oracle data guard technology. A standby database avoids data loss or downtime and it is the most economical solution. By activeactive, it means bothall sites are up, running, and accessible.
With the huge growth of data guard it s getting harder to encounter an oracle dba not dealing with data guard. 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. The oracle active data guard option, an extracost facility, extends oracle data guard functionality in oracle 11g configurations. Data guard physical standby database processes and data flow. Sql server here is a script to finding info on a database. Role transition plays an important part in data guard by providing an interface that allows dba s to activate a standby database to take over as the primary production database or vice versa. Tip the standby databases in oracle cloud infrastructure database are physical standbys. Dataguard architecture and its components in oracle 11g. In this course, you will be introduced to oracle database exadata cloud service. Overview of oracle data guard oracle data guard is the management, monitoring, and automation software infrastructure that creates, maintains, and monitors one or more standby databases to protect enterprise data from failures, disasters, errors, and data corruptions.
It can also reduce the human intervention required to switch. Maximize database availability using oracle data guard and other technologies. Oracle data guard interview questions expert oracle. You can use oracle data guard to create and maintain selection from oracle database 12c dba handbook book. Changes in this release for oracle data guard broker changes in oracle database 12c release 1 12. Oracle data guard 11g r2 beginners administration guide is a practical guide that provides all the information you will need to configure and maintain data guard. Oracle data guard is the management, monitoring, and automation software infrastructure that creates, maintains, and monitors one or more standby databases to protect. Nassyam basha oracle dba, ocm 11g, oracle ace director, author of data guard 11gr2. Oracle data guard concepts and administration 11g release 2 11. This oracle data guard training course was designed by donald k. Data guard is a technology built into enterprise edition. Oracle active data guard enables readonly access to a physical standby database for queries, sorting, reporting, webbased access, etc. Ideally, data guard provides a combined solution for the problem of high availability and disaster recovery without compromising performance. Jan 26, 2018 one of the dba s suggested the problem could be the active data guard.
The database administrator can initiate the process with just one command. Oracle data guard technology is designed to avoid single point of database failure by maintaining multiple standby databases on a complete different server. A data guard configuration consists of one production database and one or more standby databases. An oracle data guard configuration maintains multiple synchronized copies of the production database. Creating active data guard physical standby environment on asm 3. Part i concepts and administration 1 introduction to oracle data guard 1. The problems like gaps in the standby database are automatically detected and resolved. 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.
Data guard is basically a ship redo and then apply redo, as you know redo is the information needed to recover a database transaction. Oracle data guard is one of the most effective and comprehensive data availability, data protection and disaster recovery solutions available today for enterprise data. Updated 2015may18, refined the listener parameters for the databases. Steps to configure oracle 11g data guard physical standby. Jan 30, 2017 hi dba mates, as we have already seen the dataguard concepts and details. Oracle 12c data guard administration course dba genesis. This oracle data guard training is special because this course is taught by a veteran oracle certified dba with more than 20 years of fulltime experience. In this article we will set up an active data guard for a cdb named cdb12c using rman duplicate. Data guard administration ed 1 training teaches you how to use oracle data guard. Mar 21, 2015 data guard concepts with live demo from dba technologies by prasad mynumpati duration. Oracle rac, asm, data guard training dba university inc. Oracle data guard maintains the standby database by transmitting and applying redo data from the primary database. The standby databases will be always in sync with primary database.
Quick oracle dataguard check script dba survival blog. Data guard is the name for oracles standby database solution, used for disaster recovery and high availability. Oracle 9i data guard is the new name for oracle 8i standby server, incorporating a large number of new features. In it, you have a minimum of two databases, primary and standby. With 11g oracle has introduced the concept of active data guard with the possibility to query our physical standby database while it is constantly actualized to reflect the state of the primary database but with an extra charge. A physical standby is a database, therefore must be licensed, however the license expert indicates that the licenses you purchase for running the physical standby can be ubtained at a substantially reduced rate as they would be called limited licenses. Oracle data guard 11g r2 beginners administration guide is a practical guide that. Data guard real time apply tips burleson oracle consulting. There are two types of role transitions supported in oracle 10 g data guard. Data guard advantages over rac real applications clusters. This article gives an example of the setup and administration of data guard using the data guard broker. Creating active data guard physical standby environment on nonasm 2.
With the active data guard option and realtime query, you can use awr or statspack from the primary database to collect data from a standby database that is. From the overview perspective, the usage is pretty much the same. Life cycle of data guard create standby physical database new users in 12c sqplus sys as sysdg sysbackup will be used to perform all backup and recovery related operations either via rman or sqlplus sysdg is in place to separate the data guard related operations from other activities. Oracle 12c data guard administration a comprehensive course with concentration on the practical side on oracle data guard administration. Oracle data guard provides the benefits of systemlevel, sitelevel, and data level protection, resulting in high levels of availability and disaster recovery without loss of data. So active data guard was deactivated from those database. 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. Deploying oracle data guard with oracle database appliance. It can address both high availability and disaster recovery requirements and is the ideal complement to oracle real application clusters. As you know, oracle enterprise edition is very expensive. Oracle data guard concepts and administration release 2 9. Since its a common dba task to provide high availability of databases, data guard is a mustknow topic for every oracle database administrator. Oracle data guard 11g overview logical standby database. In addition to providing a quick and efficient method for recovering from userinduced errors, flashback database can also be used in combination with oracle data guard, restore points, and physical standby database to temporarily open a physical standby database in readwrite mode for qa testing, development fixes, or reporting purposes and.
Burleson, an acknowledged leader in oracle database administration. The oracle database 11g oracle active data guard service provides you with access to oracle experts who will work closely with you and your team to assist in your initial evaluation and adoption of the oracle active data guard to realize reduced cost savings, performance gains and simplified operations for your business. Once created, data guard automatically maintains each standby database by transmitting redo data from the primary database and then applying the redo to the standby database. Data guard physical standby setup in oracle database 11gr1. Oracle data guard concepts and administration is intended for database administrators. Chapter15 oracle data guard oracle data guard provides a solution for high availability, enhanced performance, and automated failover. Oracle data guard concepts and administration oracle docs. Jul 21, 2016 data guard physical standby setup using the data guard broker in oracle database 12c release 1. The data guard broker subsystem can aid in the setup, management and monitoring of data guard configurations. This is a real data guard implementation case for one of my clients.
In my case, ingredients to simulate physical standby data guard environment are as below. Oracle data guard standard edition 11g database world. This information will help dbas decide if oracle data guard is the appropriate. And we know that it is expensive and relies on largely idle systems, sitting there waiting for a. Jul 22, 2009 master oracle data guard 11g provide superior data protection, availability, and disaster recovery using the tested techniques in this oracle press guide. The reason that this is possible is that the redo logs which are shipped belong at the cdb level and include redo data for all pdbs plugged into it. Sql server top 10 transactsql statements a sql server dba should know.
Lately i was asked to create a maa environment having two 2node clusters in separate locations. Sep 05, 20 the database administrator can initiate the process with just one command. I was started my career as oracle dba in 2012 and in 2014 i was started my first youtube channel for sharing knowledge about oracle and linux. It includes basic information on standby databases. Disaster recovery a dataguard configuration consists of one primary database and one or more standby database. Oraclebase data guard physical standby setup using the. Oracle data guard also allows you to migrate across database versions using a transient logical standby database.
Data guard for disaster recovery burleson oracle consulting. All the buffer cache locks exclusive locks that are required for the transaction are acquired. Let us understand how the data flows in data guard setup as described above by points 1 to 8. In this article i shall only focus on those relevant to the oracle9i database. Oracle data guard license inquiry oracle community. You will gain handson experience on performing all the fundamental administration tasks a dba may need to manage a. Data guard physical standby setup using the data guard broker in oracle database 11g release 2. Oracle data guard logical standby database paul baumgartel transcentive, inc. Going to look at the effect dataguard has in creating pluggable databases pdbs in multitenant mt environment.
Apr 25, 2012 with oracle data guard, when maximum protection is used in combination with real time apply, businesses get the benefits of both zero data loss as well as minimal downtime in the event of a disaster and this makes oracle data guard the only solution available today with the best rpo and rto benefits for a business. Oracle dba training is one of the most popular oracle training modules that offer its participants unique opportunity in data management. All the mission critical databases must have data guard configured to avoid single point of failure. It is not a download or an addon and with the excpetion of active data guard fully included, as of this writing, in the basic ee license. Oracle d ata guard ensures high availability, data protection, and disaster recovery for enterprise data. Data guard maintains these standby databases as synchronized copies of the production database. These folks are the ones who know how data guard works.
Data guard is implemented between two clusters that reside on two different supercluster machines. Master oracle data guard 11g provide superior data protection, availability, and disaster recovery using the tested techniques in this oracle press guide. The below procedure applies between any two clusters, it doesnt matter if it is a supercluster or exadata or normal servers. Creating pdbs in a dataguard enviroment oracle database 101. Active data guard is a new option for oracle database 11g enterprise edition. Oracle database online documentation 11g release 2 11.
Active data guard provides the management, monitoring, and automation software to create. Dec 28, 2009 oracle data guard is one of the most effective and comprehensive data availability, data protection and disaster recovery solutions available today for enterprise data. Dbas who administer the backup, restoration, and recovery. All information is offered in good faith and in the hope that it may be of use, but is not guaranteed to be correct, up to date or suitable for any particular purpose. Data guard can also be referred to as log shipping its name in version 8i or standby because it has a standby database. Learn how it protects your oracle database against planned and unplanned downtimes. Data guard provides high availability for a database system. 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. The databases in a data guard configuration are connected by oracle net and may be dispersed geographically. Nov 27, 2017 far sync 6 sql 6 datapump 5 errors 5 managment 5 12c 4 active data guard 4 alert. Jun 02, 2016 hi guys today topic is very important in data guard logical standby apply all changes using sql apply and opened in read write mode for real application testing.
Data guard administration, this oracle database 12c. For more detailed information read the oracle 9i data guard concepts and administration documentation. Oracle 12c data guard physical standby setup step by step. Data guard for performance and reduced licensing costs. This book covers all aspects of oracle data guard in detail and provides an overview of the latest data guard features in oracle10g.
Your database is using async transport method and the instance load is at the peak. You should probably be using the data guard broker to configure and manage your standby database, as described here. Dataguard in oracle, create standby database, swithover in standby database, apply patch in standby database, monitor standby setup. Since it s a common dba task to provide high availability of databases, data guard is a mustknow topic for every oracle database administrator. With the huge growth of data guard its getting harder to encounter an oracle dba not dealing with data guard. The software which oracle corporation markets as oracle data guard forms an extension to. The customer wanted to separate the network traffic caused by dataguard from the public network. Applying data guard for disaster recovery solutions refers to availability level 4. Mar 12, 2015 below is basic diagram of data guard physical standby database. In general, log apply services wait for the full archived redo log to arrive to the oracle instance host before applying to the standby database. Oracle data guard concepts and administration contents. Maa data guard 12c setup guide creating a rac physical doag. The following was posted by dg product manager larry carpenter to the otn forums on 1jun2010.
Set primary database initialization parameters 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 convert it to an spfile. We can have oracle data guard with standard edition. Because data guard uses simple oneway replication, the primary database is the only database open readwrite. Oracle data guard 11g handbook larry carpenter, joseph. Data guard concepts with live demo from dba technologies by prasad mynumpati prasad mynumpati dba technologies. Similar to a primary database, a standby database can be either a singleinstance oracle database or an oracle real application clusters database. The lns is unable to keep pace and the log buffer is recycled before the redo can be transmitted to the standby, the lns automatically transitions to reading and sending from the online redo logs. We all know that data guard is essential for protecting data.
Prerequisites for oracle 12c active data guard database. With appropriately setup data guard operations, dbas can facilitate failovers or switchovers to alternative hosts in the same or. 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. Nov 21, 2011 posts about active data guard written by sumit. We provides the entire course is designed on the recommendation of industry practiced oracle experts. 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. Author of more than 30 database books, burleson was chosen by oracle press to write five authorized editions, including oracle highperformance sql tuning. Oracle database guard 12c implementation with rac stepby. Oracle data guard 11gr2 administration beginners guide. The data guard connection process drcx plays a role in transferring data between databases. Data guard has options for multiple standby sites as well as an activeactive configuration. Active active configurations with oracle active data guard.
Data guard log apply services can automatically apply information from redo logs to standby databases, keeping data synchronized with the primary database. Oracle 12c data guard configuration physical standby setup. Oracle rac stack ensures uninterrupted data center operations for. Here in this article i am going to cover steps by step approach to configure oracle 11g data guard physical standby. Data guard is oracle 12cs true disaster protection technology. The book is written for oracle 11g data guard, but clearly illustrates the differences and limitations between data guard for 10g and 11g.
Provide superior data protection, availability, and disaster recovery using the tested techniques in this oracle press guide. Clon not mounted rman duplicate target database to clon from active database. Enter your email address to follow this blog and receive notifications of new posts by email. It answers the questions you will have, and even those questions you need answers to that you didnt originally think to ask. Written by a working oracle dba, this text covers the concepts and the architecture of standby databases and provides a detailed description of the implementation and management of data guard. Oracle database high availability data guard, standby, rac. This uses a data guard roker background process, seen in the process list as dmon.
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