文章来源:https://docs.oracle.com/cd/E11882_01/server.112/e41134/whatsnew.htm#SBYDB5107

New 11.2 Features Common to Redo Apply and SQL Apply

  • As of Oracle Database 11g Release 2 (11.2.0.2), Oracle Data Guard is fully integrated with Oracle Real Application Clusters One Node (Oracle RAC One Node).
  • A Data Guard configuration can now consist of a primary database and up to 30 standby databases.
  • The FAL_CLIENT database initialization parameter is no longer required.
  • The default archive destination used by the Oracle Automatic Storage Management (Oracle ASM) feature and the fast recovery area feature has changed from LOG_ARCHIVE_DEST_10 to LOG_ARCHIVE_DEST_1.
  • Redo transport compression is no longer limited to compressing redo data only when a redo gap is being resolved. When compression is enabled for a destination, all redo data sent to that destination is compressed.
  • The new ALTER SYSTEM FLUSH REDO SQL statement can be used at failover time to flush unsent redo from a mounted primary database to a standby database, thereby allowing a zero data loss failover to be performed even if the primary database is not running in a zero data loss data protection mode. See Section 8.2.2 for more information.

原文作者: liups.com

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