What is Oracle MRP process?

The Managed Recovery Process (MRP) actually does the work of maintaining and applying the archived redo logs. Role Management Services – Control the changing of database roles from primary to standby. The services include switchover, switchback and failover.

8.1. 1 Starting Up a Physical Standby Database

  1. Start and mount the physical standby database: SQL> STARTUP MOUNT;
  2. Start Redo Apply or real-time apply: To start Redo Apply, issue the following statement: SQL> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE 2> DISCONNECT FROM SESSION;

Secondly, how do I start a DR database? To start up a physical standby database, use SQL*Plus to connect to the database with administrator privileges, and then use the SQL*Plus STARTUP command with the NOMOUNT option. (You must use the NOMOUNT option with a standby database.)

People also ask, what is RFS process Oracle?

The remote file server (RFS) process receives redo data from the primary database either in the form of archived redo logs or standby redo logs. The managed recovery process (MRP) applies information from the archived redo logs to the standby database.

What is Fal_server and Fal_client in Oracle?

Answer: The fal_server and fal_client are init. The Oracle docs note that fal_server specifies the FAL (fetch archive log) server for a standby database. The value for fal_server is an Oracle*Net service name, which is assumed to be configured properly on the standby database system to point to the desired FAL server.

What is MRP in dataguard?

The Managed Recovery Process (MRP) actually does the work of maintaining and applying the archived redo logs. Role Management Services – Control the changing of database roles from primary to standby. The services include switchover, switchback and failover.

How do you check if real time apply is enabled?

To determine if real time apply is enabled, you can query the recovery_mode column in the v$archive_dest_status view. It will display MANAGED REAL TIME APPLY when real time apply is enabled. If you define a delay on a destination (with the DELAY attribute) and use Real Time Apply, the delay is ignored.

How do I stop Oracle media recovery?

To perform cancel-based recovery: Start SQL*Plus and connect to Oracle with administrator privileges. Start a new instance and mount the database: STARTUP MOUNT. Begin cancel-based recovery by issuing the following command: RECOVER DATABASE UNTIL CANCEL.

How do I know if my standby database is in sync with a primary database?

Step 1 : Check the status of database on both server. Step 2 : Check for GAP on Standby. Step 3 & 4: Check redo received and applied on standby. Step 5: Identify the missing archive log file. Step 6: Copy missing archive log file. Step 7: Register archive logfile with standby.

What is Dg_config?

log_archive_config enables or disables the sending of redo logs to remote destinations and the receipt of remote redo logs. It also specifies the service provider names (sp_name) for each database in the Data Guard configuration.

What is sync and async in dataguard?

The synchronous log transport mode is required for the Maximum Protection and Maximum Availability data protection modes. LogXptMode = (‘ASYNC’): Conversely, asynchronous mode (ASYNC) allows updates (DML) to be committed on the primary server before the log file arrives on the standby servers.

What is LSP process in Data Guard?

LSP [Logical Standby ]: It comes into play for logical dataguard only. It controls the application of archived redo log information to the logical standby database. LSP process will transform redo data into sql statements and then these sql statements will be applied to logical standby database.

What is log shipping in Oracle database?

Log shipping. From Wikipedia, the free encyclopedia. Log shipping is the process of automating the backup of transaction log files on a primary (production) database server, and then restoring them onto a standby server. This technique is supported by Microsoft SQL Server, 4D Server, MySQL, and PostgreSQL.

What is Data Guard in Oracle 11g?

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. Data Guard maintains these standby databases as copies of the production database.

What is Oracle Active Data Guard?

Active Data Guard is a new option for Oracle Database 11g Enterprise Edition. Oracle Active Data Guard enables read-only access to a physical standby database for queries, sorting, reporting, web-based access, etc., while continuously applying changes received from the production database.

What is force logging in Oracle?

Nologging and force logging. From Oracle FAQ. NOLOGGING can be used to prevent bulk operations from logging too much information to Oracle’s Redo log files. On the other hand, FORCE LOGGING can be used on tablespace or database level to force logging of changes to the redo.

How do I enable standby database?

Below are the steps for opening standby database when the primary database is lost: start the standby database in mount stage:[ STANDBY] Check the protection_mode and database_role. Recover standby database:[ STANDBY] Finish the recovery process: Activate the standby database: Check the status: Open the database:

How do I change my primary database to standby?

if the command failed (it shouldn’t), try this one: SQL> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE FINISH SKIP STANDBY LOGFILE; Step 3 Convert the physical standby database to the primary role. SQL> ALTER DATABASE COMMIT TO SWITCHOVER TO PRIMARY; Step 4 Shut down and restart the new primary database.

What is physical standby database?

A physical standby database is an exact, block-for-block copy of a primary database. A physical standby is maintained as an exact copy through a process called Redo Apply, in which redo data received from a primary database is continuously applied to a physical standby database using the database recovery mechanisms.