As an oracle dba, implementation of high availability features is in high demand. The goal of maa is to achieve optimal high availability for oracle customers at the lowest cost and complexity. Data guard for disaster recovery burleson oracle consulting. In addition to data protection and availability, data guard standby databases deliver high return. Ideally, data guard provides a combined solution for the problem of high availability and disaster recovery without compromising performance. After you have read this book you will have mastered database highavailability concepts such as rac, data guard, oem c, and engineered systems oracle exadata x6x7 and.
It provides the management, monitoring, and automation software to create and maintain one or more synchronized standby databases that protect data from failures, disasters. Oracle database 11g r2, this environment provides a high. Oracle data guard interview questions expert oracle. Oracle active data guard creates readonly environments, which prevent the use of native reporting tools with ebusiness suite databases created by this technology. High availability is a discipline within database technology that provides a solution to protect against data loss and against downtime, which is costly to missioncritical database systems. The data guard broker is responsible for sending fan events to client applications in order to clean up their connections to the down database and reconnect to the new production database. Unplanned downtimes faststart failover or manual failover. Maximize availability with oracle database 11g release 2. Oraclebase data guard physical standby setup using the. Resolves to 3 ip addresses in the cluster, each associated with a scan listener.
If youre an oracle database administrator its almost essential to know how to protect and preserve your data. According to research oracle data guard has a market share of about 0. This book typically lags behind the oracle database high availability overview because extensive testing is required to determine the best practices. Oracle data guard ensures high availability, data protection, and disaster recovery for. So, you still have opportunity to move ahead in your career in oracle development. In this chapter, we will discuss how oracle 11g rac provides you with missioncritical options for minimizing outages and downtime as well as how rac fits into the overall scheme for. Pdf data guard is one of the high availability, disaster recovery and data protection. High availability infrastructure of database cloud. Oracle clusterware is used to manage highavailability operations in a cluster. The three guiding principles of oracles ha vision follow.
Active data guard and oracle data guard 11g are related technologies, each having a different area of focus. Oracle d ata guard ensures high availability, data protection, and disaster recovery for enterprise data. Then we will provide you with all the necessary details for you to clear the interview on oracle data guard jobs. Oracle data guard is the management, monitoring, and automation software infrastructure that creates, maintains, and monitors one or more standby databases to protect. Ask tom physical or logical standby oracle ask tom. Since a physical standby is bit for bit byte for byte the same as the production copy it would still be a 10g or 11gr1 database. Primary database changes that require manual intervention at a physical standby. Copy files from the primary system to the standby system. Heterogeneus data guard configuration primary and standby databases in a data guard configuration can be linux or windows versions realtime query capability of physical standby database active data guard user configurable conditions to initiate faststart failover corrupted controlfile, inaccesible logfile, ora errors added snapshot. Jed walker is the manager of database operations for the comcast media center in centennial colorado. The data guard broker subsystem can aid in the setup, management and monitoring of data guard configurations. Why might we consider data guard for service high availability. Download pdf oracle database 11g release 2 high availability maximize your availability with grid infrastructure rac and data guard book full free. Oracle high availability, disaster recovery, and cloud.
Data guard provides high availability for a database system. Seamless application failover with data guard oracle. This is the perfect primer to data guard that covers all the bases with a totally practical, userfriendly approach. Data guard is the oracle optimized solution for data availability and protection. If youre looking for oracle data guard interview questions for experienced or freshers, you are at right place. Easytomanage switchover and failover capabilities allow role reversals between primary and standby databases, minimizing the downtime of the primary database for planned and unplanned outages. The advantage of oracle rac is that resources on both nodes are used by the database, and each node uses its own memory and cpu. At a high level, automating client failover in a data guard configuration. Oracle data guard ensures high availability, data protection, and disaster recovery for enterprise data. Automatic gap detection and resolution in standby database.
Oracle 11g physical standby data guard failover steps. What are the advantages in using oracle data guard. Maximize your availability with grid infrastructure, rac and data guard. 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. To configure the oracle jdbc 12c replay data source in the property file or in the. Oracle data guard with oracle database 11g release 2. At a high level, automating client failover in a data guard configuration includes. You are missing that step entirely in your thought process there. See oracle database high availability best practices4. It excels at simple, fast, and reliable oneway replication of a complete oracle database to provide high availability and disaster recovery. Oracle data guard concepts and administration oracle docs. The oracle 11gr2 real application clusters administration course describes the oracle rac architecture, hands on experience and oracle real application clusters multi node installations. Full text of oracle data guard 11g r 2 administration beginners guide see other formats. Administrators can chose either manual or automatic failover of.
Nitin is a wellknown oracle technologist and speaker in the areas of oracle storage, high availability, oracle rac, and private database cloud. Oracles high availability vision whats new in oracle database 11g release 2 free download as powerpoint presentation. Oracle high availability, disaster recovery, and cloud servicesexplores all the highavailability features of oracle database, how to configure them, and best practices. Oracles high availability vision whats new in oracle. 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 data guard connection process drcx plays a role in transferring data between databases. Information is shared between nodes through the interconnectthe virtual private network. Data guard is the name for oracles standby database solution, used for disaster recovery and high availability. Pdf oracle database 11g release 2 high availability. Customer demands are increasing day by day and 247 availability is what needed. The client wants that the servers would be in active passive environments. I have singleinstance database, and need to configure them for high availability and disaster tolerance.
Step by step guide to build dataguard in oracle 11g. Data guard is controlled with either the dgmgrl command line utility to run, type zdgmgrl. It includes basic information on standby databases. Following are the different benefits in using oracle data guard feature in your environment. In addition to data protection and availability, data guard standby databases deliver high return on investment by supporting ad hoc queries, reporting, backups, or test activity, while in standby. Anything that oracle clusterware manages is known as a crs resource. Oracle data guard provides a comprehensive set of capabilities for data availability and protection that are included with oracle database enterprise edition. As was the case in the backup based duplication, active duplication can be used to create a standby database. Configure wrapper script and configuration file for the ons publisher. Oracle data guard zero or minimal oracle patchset and full oracle release upgrades oracle data guard zero or minimal platform migrations oracle data guard zero or minimal application upgrades editionbased redefinition zero high availability is absolutely essential for uswe now use oracle rac for instance failover, data guard for site. Some examples of crs resources are database, an instance, a service, a listener, a.
There are various leading companies that offer jobs in various roles. He has been working with oracle database since 1997 and is an oracle certified professional for 9i, 10g, and 11g database. This article gives an example of the setup and administration of data guard using the data guard broker. Oracle data guard maintains one or many secondary databases as alternatives to the primary production database. Oracle database high availability overview 11g release 2. Master oracle high availability setup using oracle data guard technology. Oracle data guard is oracles main solution for high availability in the event of a disaster. The best practices described in this paper require that the data guard configuration be managed by the data guard broker9. High availability is becoming very important to every business in the world.
Full text of oracle data guard 11g r 2 administration. Pdf role of oracle active data guard in high availability. Oracle white paperoracle database 11g release 2 high availability 3 the oracle way to high availability given these problems, oracle has taken the approach of building a set of tightly integrated ha features within the database kernel. The active data guard in oracle database 11g has brought significant changes in the. Client failover best practices for highly available oracle databases. This article contains an updated version of the 9i physical standby setup method posted here. Prior to oracle database 11g duplication was performed from an existing rman backup. Oraclebase data guard physical standby setup in oracle. He is the primary internet database designer and an oracle dba at lands end in dodgeville. High availability is absolutely essential for uswe now use oracle rac for. Guenadi jilevski is a senior oracle professional ocp 7, 8, 8i, 9i, 10g, 11g, 12c oce 10gr2 rac, oce oracle rac 11gr2 and grid infrastructure administrator, oracle exadata 11g certified implementation specialist,oracle goldengate 10g11g certified implementation specialist and ocm 9i, ocm 11g with more than 20 years of industrial. Data guard physical standby setup in oracle database 11g release 2.
Oracle 11gr2 data guard physical standby part i author. This information will help dbas decide if oracle data guard is the appropriate. Introduction to oracle data guard burleson oracle consulting. Real application clusters rac oracle rac dba tutorial. Following a data guard failover manual or faststart failover, data guard.
Data guard is the data protection and availability solution for oracle. High availibilty of oracle servers oracle community. Configuring weblogic server data sources for data guard 10. This chapter provides an overview of oracle data guard technology. About the authors bob bryla is an oracle 9i and 10g certified professional with more than 20 years of experience in database design, database application development, training, and oracle database administration. He is the author of oracle automatic storage management and the data guard handbook both from oracle press and has written many papers on storage, database internals, database tuning, and served as a. Data guard can be used with traditional backup, restoration, and cluster techniques to provide a high level of data protection and data availability. Its a clustered version of oracle database based on a comprehensive high availability stack learn to deploy 2 node rac using oracle virtualbox with this course. What are the dr options available to sync database on remote location with a delay of 5 to 10 minutes. Data guard is one of the high availability, disaster recovery and data protection architecture from oracle. Data guard physical standby database best practices part. Oracle blogs oracle maximum availability architecture blog.
High availability oracle 11g r1 r2 real application. In contrast, oracle data guard 11g redefines expectations for data protection solutions. Oracle database 11g introduces active database duplication which copies the live source database over the network without the need of an existing backup. 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. Data guard provides an efficient and comprehensive disaster recovery and high availability solution. With our jobs portal you will find the number of jobs related to you along with the oracle data guard interview questions and answers. Sample read write connection url for primary and standby rac 11gr2. Quick guide to configuring oracle 11gr2 data guard. Data guard is the data protection and availability solution for oracle database. A partialsite failure where the primary database a singleinstance database or all nodes in an. Stepbystep configuration of data guard broker in oracle 11g. Data guard is the name for oracle s standby database solution, used for disaster recovery and high availability.
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. Figure 2 oracle database high availability features. Missing even one critical file can render the entire database backup useless. Oracle database high availability solutions for unplanned downtime 8. There are lot of opportunities from many reputed companies in the world. Maximize your availability with grid infrastructure, rac and data guard jesse, scott on. Data guard protection modes implement rules that controls how the configuration will respond to failures, enabling you to achieve specific objectives for data protection, availability, and performance. 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 can also reduce the human intervention required to switch. Real application clusters provide high availability because of the failover of connections in the event of a hardware failure or server.
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