Oracle Data Guard Configuration

Not Oracle Cloud InfrastructureNot Oracle Cloud at Customer This topic does not apply to Oracle Cloud Infrastructure or to Oracle Cloud at Customer.

The Oracle Data Guard configuration in an Oracle Database Cloud Service deployment that uses Oracle Real Application Clusters (Oracle RAC) and Oracle Data Guard has the following characteristics.
  • Standby Database Type: Physical. The Oracle Data Guard configuration includes a physical standby database. A physical standby database provides a physically identical copy of the primary database, with on disk database structures that are identical to the primary database on a block-for-block basis.

  • Data Protection Mode: Maximum Performance. The Oracle Data Guard configuration uses maximum performance protection mode. This protection mode provides the highest level of data protection that is possible without affecting the performance of a primary database. This is accomplished by allowing transactions to commit as soon as all redo data generated by those transactions has been written to the online log. See "Oracle Data Guard Protection Modes" in Oracle Data Guard Concepts and Administration for Release 18, 12.2, 12.1 or 11.2 for more information on data protection modes.

  • Redo Transport Services Mode: Asynchronous (ASYNC). Redo transport services control the automated transfer of redo data from the production database to one or more archival destinations in an Oracle Data Guard configuration. The Oracle Data Guard configuration is set to asynchronous (ASYNC attribute of the LOG_ARCHIVE_DEST_n initialization parameter). The asynchronous redo transport mode transmits redo data asynchronously with respect to transaction commitment. A transaction can commit without waiting for the redo generated by that transaction to be successfully sent to any redo transport destination that uses the asynchronous redo transport mode. See "Introduction to Redo Transport Services" in Oracle Data Guard Concepts and Administration for Release 18, 12.2, 12.1 or 11.2 for more information on redo transport services modes.