RMAN manages the deletion
of backup files that are no longer necessary. In combination with ASM, RMAN
will write all backups, archive logs, control file autobackups, and datafile copies to a
designated disk group. The single storage location is referred to as the Flash Recovery
Area.
More recently, Oracle introduced the Information Lifecycle Management (ILM)
Assistant for managing online data and allocating data to appropriate tiers of disk
performance. In Oracle Database 11g, the Flashback data archive feature has been
added to ILM, enabling the storing and tracking of all transactional changes to a
record. This feature, available through Oracle??™s Total Recall Option, allows you to
gain access to previous database records.
Read-Only Tablespaces
Oracle 7.3 introduced read-only tablespaces. Using the ALTER TABLESPACE command
in SQL, youcan mark a tablespace as read-only. No changes are possible to
the objects stored in a read-only tablespace. Youcan toggle a tablespace between
read/write and read-only states as you wish.
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