Oracle data guard 12c handbook
Data Guard Concepts and Administration - ContentsFurushima OCE. Oracle Data Guard ensures high availability, data protection, and disaster recovery for primary production database. Data Guard provides a comprehensive set of services that create, maintain, manage, and monitor one or more standby databases to enable primary databases to survive disasters and data corruptions. A Standby database is copy of the primary database. Then, if the primary database becomes unavailable Data Guard can switch any standby database role to the primary role. A Data Guard configuration consists of one database that in the primary role and one or more 30 databases that in the Physical, Logical or Snapshot standby role and data guard services. Apply services automatically apply the redo data on the standby database to maintain consistency with the primary database.
oracle data guard configuration step by step in oracle 12c r2 new features for dba
Changes in This Release for Oracle Data Guard Concepts and Administration
Bob Bryla. The standby redo logs should be at least as big as the largest online redo log and there should be one extra group per thread compared the online redo logs. If a physical standby database in a Data Guard configuration has any adta the above features enabled, then the Active Data Guard option must be licensed for every such physical standby. The broker will not allow you to enable the configuration if it does not find a standby database in the configuration that can support the requirements of the protection mode.There may be several archive logs are waiting in standby location for one archive log file. Update Processes init parameter. We're featuring millions of orracle reader ratings on our book pages to help you find your new favourite book. Privilege must have been granted directly.
Protection Modes 2. Verify Timezone version So trace. The standby database has been created from backups of the primary database control files and datafiles as described in the Oracle Data Guard Concepts and Administration.
Configure Oracle Data Guard Broker - Oracle 12c Data Guard Administration
Data Guard is the name for Oracle's standby database solution, used for disaster recovery and high availability. This article contains an updated version of the 9i physical standby setup method posted here. You should probably be using the Data Guard Broker to configure and manage your standby database, as described here. If you already know about Data Guard and want to quickly set up a demo environment using VirtualBox and Vagrant you can follow the instructions in my GitHub repository here. In this case they are both set to "DB11G" on the primary database.
The use of standby redo logs can speed up the application of changes to a standby database  with real-time apply? When an unsupported statement or package is encountered, where the RFS process writes the redo data to either archived redo logs or optionally to a standby redo log. Redo data is received by the remote file server process RFS on the standby system, be sure to add credentials for both the primary and fast-start failover target standby databases. When starting the observer interactively, SQL apply operations stop. If you choose to use a client-side Oracle Wallet as a secure external password store see Oracle Database Enterprise User Security Administrator's GuideOracle recommends that connection credentials not be supplied as command line parameters to the DGMGRL connect command.
You must use a server parameter file with the broker see Section 2. If an instance was not started with a server parameter file, then you must shut down the instance and restart it using the server parameter file. The parameter value will be saved in the server parameter file. The standby database has been created from backups of the primary database control files and datafiles as described in the Oracle Data Guard Concepts and Administration. There are standby redo log files configured for both the primary and standby database. In both examples, you are prompted for a password. Otherwise, the following error message is returned when you attempt to create the configuration:.
Alternatively, a supplementary mechanism may transfer the archived redo logs. Maurice Naftalin. If you disable management of a far sync instance while connected to that far sync instance, you must connect to the primary database or another enabled standby database to guafd broker management of the far sync instance. The broker will not allow you to enable the configuration if it does not find a standby database in the configuration that can support the requirements of the protection mode.
Larry Carpenter. Following one of blogs last year about How to hanfbook a database manually in oracle. In this case they are both set to "DB11G" on the primary database. 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 tuni.You can modify the values of database properties at any time-if the database is enabled or disabled. With this we can archive specific rows of a table as per our requirement. Standby redo logs must be configured on the primary and standby databases. Run preupgrade script.
This solution has been deployed and tested according to the following hardware and software configuration:. Michael McLaughlin. Enabling fast-start failover does not trigger a failover. The standby makes use of "Redo Apply" technology.