Preparing the primary database for standby database creation. Oracle 10g data guard is a great tool to ensure high availability, data protection and disaster recovery for enterprise data. How to open manual physical standby database in read only. Using a standby controlfile gives you some additional benefits, one which i believe is a read only standby database. Here, we will continue with the switchover process. During peak business hours, it is not advised to export data from production. I have been working on data guardstandby databases using both grid control and sql command line for a couple of years, and my latest experience with data guard was manually creating a physical standby database for a laboratory information management system lims half. Creating a standby database with recovery manager oracle. The idea that i tested out was the use of san based snap technology on the primary db as a way to rollback any changes should the upgrade fail. Look at joel goodmans introduction into oracle restart, if you never heared of it before. Appendix e for information about creating a standby database with recovery manager rman 3. A standby database is a transactionally consistent copy of an oracle production database that is initially created from a backup copy of the primary database. This capability is known as the realtime query feature. Scheduled and unscheduled maintenance at primary site e.
Yes, assuming it does only read only things no sequence. Oracle data guard maintains these standby databases as copies of the production database. In the previous article, we have configured dataguard broker for oracle rac database with physical standby in 11gr2. Rebuilding standby database manually 11g and up one of my remote customers has been facing severe network outages between production and dr sites to reasons unknown and challenges with certain geographic limitations, the bandwidth between sites is limited to 2mbps and the replication between sites is aching slow. Creating a physical standby using rman duplicate from. This can either be the primary database, but also another standby, archivelog repository or far sync standby oracle 12. The other option from 11g could be snapshot standby database. Application dr tests switchover can be used for a dr test that tests nondatabase parts failover is the right. Configuring oracle database 11g with oracle data guard. Oracle 11g has made it extremely simple to set up a standby database environment because recovery manager rman now supports the ability to clone the existing primary database directly to the intended standby database site over the network via the duplicate database command set while the target database is active.
Leveraging oracle 11g data guard for database backup and. How to open manual physical standby database in read only mode oracle 11g manual data guard partiii. Creating a physical standby database oracle help center. Create standby redolog file to primary and dr for the user of switch over. Here i have provided steps for creating database manually with installation of differnt optional components. I have been working on data guardstandby databases using both grid control and sql command line for a couple of years, and my latest experience with data guard was manually creating a physical standby database for a. Manual failover,failover,physical standby,standby database. As was the case in the backup based duplication, active duplication can be used to create a standby database. The procedure is very simple, still is convenient to have it available so that in the stress situation of a production crash we can implement it without problems. Prior to oracle database 11g duplication was performed from an existing rman backup.
At first, i installed oracle database 11gr2 grid infrastructure for standalone server to get oracle restart, then oracle database 11gr2 software only. Oracle data guard enables you to use a physical standby database redo apply. See oracle data guard broker to use the data guard broker to automate the. This note explains the procedure of creating a physical standby database using 11g rman duplicate from active database feature which is now available in 11g release 1 onwards. In toad for oracle, rightclick the user, alter, paste new password. Physical standby database should be in readonly mode active dataguard 2. Shutdown database and start physical standby database with oracle 12c 12. A primary database running on a dedicated server and a physical standby database on a separate dedicated server.
Manual physical standby failover activate standby database oracle 11g manual data guard partv published may 12, 2016 may 15, 2016 by jignesh jethwa in case of disaster with primary database site, or not available for production for any reason then we can activated standby database as a primary production database. Resetting the password for oracle 11g or 12c users with same password. An oracle database can be created either using manually or using dbca gui method. This approach does not impact the oracle physical standby databases when upgrading to 11g, allowing you to only apply the upgrade to the standby dbs if they primary database upgrade is a success. Oracle 11gr2 rac to rac standby database manual failover steps description.
In my case, ingredients to simulate physical standby data guard. This article contains an updated version of the 9i physical standby setup method posted here. Using an oracle managed standby database can allow the dba to provide near. See realtime query for more details if a license for the oracle active data guard. Installing and using standby statspack in 11g by active data guard statspack cannot be executed on a standby database due to its readonly nature therefore tuning the performance of the apply process involves manually collecting statistics. Upon successful completion of this course, students will be able to. While oracle 11gs data guard definitely protects a database when the entire production site is lost via its failover capabilities, its still necessary for an oracle dba to intervene to complete the failover process. You can offload all reporting applications and the oracle rman backup to the standby database, easing the load on the primary database considerably. Oracle 11g to 12c database upgrade with data guard and asm 4. Manual switchover without dataguard in oracle dbametrix. This article gives an example of the setup and administration of data guard using the data guard broker.
A primary database that is running normally the switchover operation must start from the primary site. Manually create a physical standby database using data. So if we have a physical standby database, we can export data using datapump from standby database. In addition, management of a data guard configuration and troubleshooting are discussed. How to manually open the standby database when the primary. How to create a 11gr2 physical standby database using.
You can manually create a physical standby database in maximum performance mode using asynchronous redo transport and realtime apply, the default oracle data guard configuration. Data guard physical standby setup using the data guard broker in oracle database 11g release 2. In the oracle 11g database, you can have the physical standby open readonly and still be in recovery mode. Physical standby database failover with data guard as previously mentioned, the physical standby database is an exact copy of the primary database on a blockperblock basis. In remote dba services, these type of oracle errors are very critical to manage if you havent access of some commands or not having more knowledge of operating system commands. Oracle data guard physical standby database disabled. Data guard physical standby setup in oracle database 11g. How to use expdp to export data from physical standby database. Oracle data guard makes it possible to back up a production database using a valid physical standby database as the target for the backups, and those same backups can be used to restore and recover a production database.
Redo data will continue to be received by the database while it is operating as a snapshot standby database, but it will not be applied until the snapshot standby is converted back into a physical standby database. The application of the logs was achieved manually by using sqlplus commands. A check database configuration before switchover b performing switchover c check database configuration after switchover a. Oracle 11g installation with asm and data guard setup.
It is possible to specify multiple service names comma separated. Oracle database rolling upgrade from 11g to 12c using a. Step by step oracle 11gr2 rac standby database manual failover. Data guard is the name for oracles standby database solution, used for disaster recovery and high availability.
Upgrade to 11g with physical standby databases ora00600blog. Oracle 11g to 12c database upgrade with data guard and asm. Forced logging is on in primary database sqlalter database force logging. That works well until you realize you forgot everywhere you used and need to update that password. 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. 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. We use the dataguard feature to automatically replicate the primary database to the physical standby database in real time. Using the oracle active data guard option, you can open the physical standby database for readonly operations while the managed recovery process is going on. Enable forced logging first step, recommended for physical and logical standby database, is to enable forced logging. Oracle rac database switchover using dataguard broker. Failover with no dg broker no flashback failover using manual method. But few organizations recommend to use manual method for creating database.
The procedure for creating a standby database with rman is almost the same as for creating a duplicate database. The procedures in this appendix use the database upgrade. Once the standby database is created and configured, oracle data guard automatically maintains the standby database by transmitting primary database redo data to the standby system, where the redo data is applied to the standby database. This enables us to create a physical standby database without having to take a backup of the primary database as a prerequisite step. Create standby database using 11g duplicate from active. Steps involved in switchover using dataguard broker. Use data guard standby databases to support production. Analyze asm datapump data guard data redaction dbv dbvisit standby enterprise manager exportimport linux manual data guard mongodb v3 mysql offline backup online backup ora600 oraxxxxx oracle oraclelinux oracle 10g oracle 11g oracle 12c oracle how tos oracle scripts oracle vm manager other postgresql rac redhat rman sql server sql server. If your standby database has not timed out from your recovery, simply open a new sql session into the standby database, by using a dba account, and issue alter database recover managed standby database cancel. The primary database is also backeed up through rman. Oracle 10g manually create a physical standby database.
Data guard physical standby setup using the data guard broker in oracle database 11g release 2 assumptions you have two servers p. Care and feeding of a standby database burleson consulting. Oracle data guard interview questions and answers kits. Convert the physical standby database to a snapshot standby database using dgmgrl and the convert database command. Browse other questions tagged oracle11gr2 datasynchronization standby or ask your own question. Using an oracle managed standby database can allow the dba to provide near 247 availability of the database, year in and year out. Do you need to recreate all the data guard infrastructure once the failover has been performed.
The only thing is that when you switch back to physical stand by all the changes made while it is in readwrite mode are lost. There are some steps to execute in order to prepare the primary database to be part of a data guard configuration. Switchover and failover for oracle rac database using. How do you reduplicate a broken physical standby database. Oracle data guard 11g features, including oracle active data guard and snapshot standby databases are outlined. Where you can convert your physical standby database to snapshot standby database which opens the database in readwrite mode. Steps to configure manual data guard oracle 11g manual data guard parti. I am trying to add new standby database by using grid control.
Oracle data guard 11g overview logical standby database. You need to amend the duplication procedures described in oracle database backup and recovery users guide to account for issues specific to a standby database to create a standby database with the duplicate command you must. This post explains how to manually convert the physical standby into the primary database, when the primary is not available anymore. Data guard, database, failover, manual failover, physical standby, physical standby database, primary, standby database ora02374. Oracle maximum availability architecture maa is the oracle best practices blueprint for implementing oracle high availability technologies. In our case, i neglected to stop data guard prior to changing the passwords, which caused our production server to be marked as disabled. If a license for the oracle active data guard option has been purchased, redo apply can be active while the physical standby database is open, thus allowing queries to return results that are identical to what would be returned from the primary database. If this occurs, you must either manually retrieve and register an archived redo log. Oracle data guard broker and the enterprise manager online help system for information about using the graphical user interface to automatically create a physical standby database. Steps to configure oracle 11g data guard physical standby active. Oracle database 11g introduces active database duplication which copies the live source database over the network without the need of an existing backup. If you are planning to use an active duplicate to create the standby database, then this step is unnecessary.
Oraclebase data guard physical standby setup using the. Data guard is the name for oracle s standby database solution, used for disaster recovery and high availability. Perform the following steps to upgrade to oracle database 11 g release 1 11. Using standby dr database for reporting oracle ask tom. If you are using the data guard broker to manage your. How to drop database manually, without using database. Now the current logical standby database oracle 11g 11. With this activity, we can enable automatic failover using faststartfailover observer. If you use your standby for reporting or run it openread only 11g you will need.
1101 1047 1565 1308 604 1222 301 1083 1616 950 433 1105 6 1112 1375 694 769 591 681 774 91 1230 1528 1534 1566 906 1280 1152 1077 1479 827 1204 1025 1462 536 311 1130 64 400 845