Active data guard standby database realtime data synchronization through data guard with active data guard 11 g better performance secured internet access 24x7 standby always uptodate quick win. The active data guard in oracle database 11g has brought significant changes in the. This article gives an example of the setup and administration of data guard using the data guard broker. Oracle active data guard delivers realtime data protection and availability while eliminating compromise inherent to other solutions for the oracle. In sum, current 2006 oracle data guard licensing policies suggested that if data guard is installed for standby purposes, it required full licensing. Oracle active data guard realtime data protection and. Oracle 12c how to prevent license violation with active. It can also create local archived redo logs and transmit online redo to standby databases. Oracle data guard is the most powerful skill a dba can have. For some applications active data guard can represent a more efficient use of oracle licenses on the standby database. In it, you have a minimum of two databases, primary and standby. Master oracle 11g data guard video course teaches you how to implement oracle data guard in real time environment. Managing awr in active data guard standby databases.
By activeactive, it means bothall sites are up, running, and accessible. Explains the structure of a physical standby database with oracle 12c data guard in an sap environment. This means a standby can be available for querying, yet still be up to date. Primary database changes that require manual intervention. Oracle data guard ensures high availability, data protection, and disaster recovery for enterprise data. 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. Active data guard is a licensed option for oracle database enterprise edition. In my opinion there are two killer features in the data guard section. Data guard is the name for oracles standby database solution, used for disaster recovery and high availability.
So, you still have opportunity to move ahead in your career in oracle development. Active data guard and data guard 12c best practices. Unique advantages of oracle active data guard active data guard is an evolution of data guard technology, providing unique performance advantages while leveraging all other enhancements included in oracle data guard 11g. Dataguard architecture and its components in oracle 11g. Oraclebase data guard physical standby setup in oracle. This allows the standby database to be open in readonly mode, but still apply redo information. Difference between physical standby database in a data. If all of them are in place and when you are on the right patch level, then it works. For a full current explanation of oracle data guard licensing prices and policies, contact your oracle customer support representative csr. Data guard has options for multiple standby sites as well as an activeactive configuration. If there are additional standby databases in the oracle data guard configuration that are not using any of the oracle active data guard features, those standby databases do not require an oracle active data. Active data guards deep integration with oracle database and complete focus on realtime data protection and availability avoids. Step by step configuration of data guard broker for rac database. Local and remote protection from downtime or data loss due to database or site failure.
Longer rto to switchover between active and standby database. Oracle active data guard far sync zero data loss at any distance pdf. To protect against this scenario, deploy your workloads across multiple oracle cloud infrastructure regions. Oracle data guard is a technology which helps you protect against planned and unplanned downtime. Active data guard adg adding pluggable databases to an existing multitenant data guard environment we all know the benefits of the oracle multitenant cosolidation manyasone, one container cdb operation for wich many pluggable databases pdbs can take benefit. Data backup and restore tools 10 oracle recovery manager rman 11 oracle active data guard data migration approach data migration is essentially the movement of data from one system to another. One or more archiver processes make copies of online redo logs either locally or remotely for standby databases. The oracle active data guard option, an extracost facility, extends oracle data guard functionality in oracle 11g configurations. If a license for the oracle active data guard option has been purchased, redo apply can be active while the physical standby.
As a dba it is very focal to understand the difference, as active data guard involves license cost. The two databases make an oracle data guard association. It allows readonly access on the physical standby node at the same time as applying archived transactions from the primary node. There are no restrictions on where the databases are located, provided they can communicate with each other. Depending on your dr goals rto and rpo, you can back up or replicate your data to another region, or set up a fully activetoactive standby in another region. If youre looking for oracle data guard interview questions for experienced or freshers, you are at right place. Few dbas assumes that active data guard need different configuration and implementation plan. Active data guard and data guard 12c best practices oracle. The databases in a data guard configuration are connected by oracle net and may be dispersed geographically. Active active configurations with oracle active data guard. Data guard is oracle 12cs true disaster protection technology. For example, any data guard 11g physical standby database can be easily converted to a snapshot standby.
Oracle data guard provides the management, monitoring, and automation software to create and maintain one or more standby databases to protect oracle data from failures, disasters, human error, and data corruptions while providing hig. 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. Explore how data guard standby databases can be used to support production functions such as reporting, querying and testing, while in a standby role. You are correct, the oracle web site says that data guard sql apply and redo apply comes as part of 10g enterprise edition ee.
Collects redo information and updates the online redo logs. 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. 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. Oracle active data guard creates readonly environments, which prevent the use of native reporting tools with ebusiness suite databases created by this technology.
Oracle offers a rich set of tools and utilities for performing data movement across systems. Affirm and noaffirm i cannot identify a real killer feature on 12c so far, they seem to have just steadily improved what was there in 11g. You will get full details on implementing deployment architectures to address requirements that extend beyond disaster recovery. There are licensing implications for this feature, but the following commands show how active data guard can be. The difference between physical standby database in a data guard and active data guard is as bit confusing. Oraclebase data guard physical standby setup using the. Guard to improve quality of service for your critical business applications. Active data guard eliminates the high cost of idle redundancy by allowing reporting applications, adhoc queries, and data extracts to be offloaded to readonly copies of the production database. Oracle active data guard also enables the use of fast incremental backups when offloading backups to a standby database, and can. Setting up oracle 12c data guard for sap customers. This framework is called the remote management framework rmf. There are lot of opportunities from many reputed companies in the world. Could you please explain me how is it possible or what mechanism oracle has created to keep database in read only mode and recovery is. Master oracle data guard 11g provide superior data protection, availability, and disaster recovery using the tested techniques in this oracle press guide.
The oracle cloud infrastructure database data guard implementation requires two databases. Cascading standby database support for dgmgrl and oracle active data guard far sync in combination. A data guard configuration consists of one production database and one or more standby databases. In 11g, oracle introduced the active data guard feature. Then configure your network tnsnames for data guard. As to data guard, oracle is slicingoff the functionality as data guard matures. Oracle data guard concepts and administration oracle docs. Hello tom, as we are aware of active data guard, in which database is in read only mode and recovery is also running. Active data guards deep integration with oracle database and complete focus on realtime data protection and availability avoids compromises. Easy to implement utilize existing dr system use active data guard to offload public internet access to highres 3d digital. Oracle active data guard enables readonly access to a physical standby database for queries, sorting, reporting, webbased access, etc. Also see my notes on far sync instances with active 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. It indicates all the steps needed to successfully install and configure an oracle data guard system with a physical standby database and the logical order in which they must be carried out.
All capabilities described in the following sections that are explicitly referred to as being active data guard require an active data guard license. What is the difference between oracle data guard and. According to research oracle data guard has a market share of about 0. Actually you dont use active data guard but it is active. Nevertheless, i have 12cr1 here, and my favorite way to prevent a license violation with active data guard is related to cluster resources, in combination with the dataguard broker and an observer. Data guard is one of the high availability, disaster recovery and data protection architecture from 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. Oracle active data guard must be licensed on any standby databases with any of the above features in use, as well as the primary database. This command open database as read only and you start log applying so that you use active data guard option without be aware. Oracle 11gr2 active data guard active data guard allows a standby database to be opened for readonly access whilst redo is still being applied.