Backup & Recovery New Features in Oracle11g

* Enhanced configuration of archive deletion policies Archive can be deleted , if it is notneed DG , Streams Flashback etc When you CONFIGURE an archived log deletion policyapplies to all archiving destinations, including the flash recovery area. BACKUP ... DELETEINPUT and DELETE... ARCHIVELOG use this configuration, as does the flash recovery area.When we back up the recovery area, RMAN can fail over to other archived redo logdestinations if the flash recovery area is inaccessible.

* Configuring backup compression: In 11g can use CONFIGURE command to choose between the BZIP2 and ZLIB compressionalgorithms for RMAN backups.

* Active Database Duplication: Now DUPLICATE command is network aware i.e.we can create a duplicate or standbydatabase over the network without taking backup or using old backup.

* Parallel backup and restore for very large files: RMAN Backups of large data files now use multiple parallel server processes to efficientlydistribute theworkload for each file. This features improves the performance of backups.

* Improved block media recovery performance: RECOVER command can recover individual data blocks.RMAN take older, uncorrupted blocks from flashback and the RMAN can use these blocks,thereby speeding up block media recovery.

* Fast incremental backups on physical standby database: 11g has included new feature of enable block change tracking on a physical standbydatabase (ALTER DATABASE ENABLE/DISABLE BLOCK CHANGE TRACKING SQL statement).
This new 11g feature enables faster incremental backups on a physical standby databasethan in previous releases.because RMAN identifywe the changed blocks sincethe lastincremental backup.