What is Active Data Guard in Oracle 11g?

Oracle Active Data Guard, an option of Oracle Database 11g Enterprise Edition is a simple, high performance solution that protects your Oracle Database against planned and unplanned downtimes, by allowing you to offload resource workloads from your production database to one or more synchronized standby databases.

What is Fal_server and Fal_client in Data Guard?

Answer: The fal_server and fal_client are init. ora parameters are used for the gap resolution. When MRP finds that an archive log is missing during media recovery, it sends the fal_client information to the server identified by fal_server and requests fal_server to resend the file again.

What is the use of Active Data Guard?

Active Data Guard is a comprehensive solution to eliminate single points of failure for mission critical Oracle Databases. It prevents data loss and downtime simply and economically by maintaining a synchronized physical replica (standby) of a production database (primary).

What is FAL in dataguard?

FAL means fetch archive log. Its clearly indicate with name that fetch the archive log. FAL_SERVER used to fetch archive log server for a standby database. Value in FAL_SERVER parameter act as Oracle Net Service name which point to standby database.

How does Active Data Guard work?

Active Data Guard enables read-only access to a physical standby database while Redo Apply is active. Queries and reports can be offloaded from the production system to a synchronized physical standby database – all queries at the standby database return up-to-date results.

What is active standby database?

A standby database is a database replica created from a backup of a primary database. By applying archived redo logs from the primary database to the standby database, you can keep the two databases synchronized. A standby database has the following main purposes: Disaster protection.

How do I start MRP in Data Guard?

To run MRP on specified number of instances, ALTER DATABASE RECOVER MANAGED STANDBY DATABASE DISCONNECT FROM SESSION INSTANCES 2; How it works? Well, each apply instance on standby site will divide the threads of redo received from primary among the apply instances to improve the scalability of redo apply.

How do I know if Active Data Guard is enabled?

If you start a database in SQL*Plus using the STARTUP command and then invoke managed recovery, the Active Data Guard will be enabled. However, if the database is started in SQL*Plus using the STARTUP MOUNT command and then managed recovery is invoked, Active Data Guard will not be enabled.

What is LSP process in Data Guard?

– Logical Standby Process (LSP)? The LSP applies the redo records from archived redo logs to the logical standby database. The Oracle database log miner engine is used by the logical standby process for the SQL apply operations.

What is RFS and MRP in 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. Archiver (ARCn) If standby redo logs are being used, the ARCn process archives the standby redo logs that are to be applied by the managed recovery process (MRP).

What is RFS process in Data Guard?

Remote file server (RFS) 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.

How do I start an RFS process in standby database?

8.1. 1 Starting Up a Physical Standby Database

Start and mount the physical standby database: SQL> STARTUP MOUNT;
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;

What is STANDBY_FILE_MANAGEMENT parameter?

STANDBY_FILE_MANAGEMENT enables or disables automatic standby file management. When automatic standby file management is enabled, operating system file additions and deletions on the primary database are replicated on the standby database. STANDBY_FILE_MANAGEMENT is only applicable to physical standby databases. Values.

How do you set up a Data Guard?

Use the following configuration best practices for Data Guard:

Use Oracle Data Guard Broker with Oracle Data Guard.
Use Recovery Manager to Create Standby Databases.
Use Flashback Database for Reinstatement After Failover.
Use FORCE LOGGING Mode.
Use a Simple, Robust Archiving Strategy and Configuration.

Do I need to purchase Active Data Guard with Oracle Database 11g?

No. An Oracle Database Enterprise Edition license is the only license required to use Data Guard features other than those explicitly included with the Active Data Guard Option as described in the table above. I am already using Data Guard 10g, do I need to purchase Active Data Guard when I upgrade to Oracle Database 11g?

What is the Active Data Guard option (ADO)?

Queries and reports can be offloaded from the production system to a synchronized physical standby database – all queries at the standby database return up-to-date results. An Active Data Guard Option license must be purchased in addition to Oracle Enterprise Edition in order to utilize these new capabilities.

Do I need an active data guard option license?

An Active Data Guard Option license must be purchased in addition to Oracle Enterprise Edition in order to utilize these new capabilities. Active Data Guard and Oracle Data Guard 11g are related technologies, each having a different area of focus.

How does Active Data Guard work with redo apply?