Remote File Server process required when archiving to a remote destination - Oracle Redo Log

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• Nirja Shah   -Posted on 24 Sep 15
  - Each ARCn process has a corresponding RFS for each standby destination.
  
  - For example, if three ARCn processes are archiving to two standby databases, then Oracle Database establishes six RFS connections.
  
  - You transmit archived logs through a network to a remote location by using Oracle Net Services.
  
  - Indicate a remote archival by specifying a Oracle Net service name as an attribute of the destination.
  
  - Oracle Database then translates the service name, through the tnsnames.ora file, to a connect descriptor.
  
  - The descriptor contains the information necessary for connecting to the remote database.
  
  - The service name must have an associated database SID, so that the database correctly updates the log history of the control file for the standby database.
  
  - The RFS process, which runs on the destination node, acts as a network server to the ARCn client.
  
  - Essentially, ARCn pushes information to RFS, which transmits it to the standby database.
  
  - The RFS process, which is required when archiving to a remote destination, is responsible for the following tasks:
  
  1. Consuming network I/O from the ARCn process
  2. Creating file names on the standby database by using the STANDBY_ARCHIVE_DEST parameter
  3. Populating the log files at the remote site
  4. Updating the standby database control file (which Recovery Manager can then use for recovery)
  
  - Archived redo logs are integral to maintaining a standby database, which is an exact replica of a database.
  
  - You can operate your database in standby archiving mode, which automatically updates a standby database with archived redo logs from the original database.

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