Optionally,
Oracle offers an enterprise-class backup solution simply named Oracle Secure
Backup.
Database Availability
Database availability depends upon the reliability and management of the database,
the underlying operating system, and the specific hardware components of the system.
Oracle has improved availability by reducing backup and recovery times by:
??? Providing online and parallel backup and recovery
??? Improving the management of online data through range partitioning
??? Leveraging hardware capabilities for improved monitoring and failover
The relevant features are described in the following subsections.
Partitioning option
Oracle introduced partitioning as an option with Oracle8 to provide a higher degree
of manageability and availability. Youcan take individual partitions offline for maintenance
while other partitions remain available for user access. In data warehousing
implementations, partitioning is sometimes used to implement rolling windows based
on date ranges. Other partitioning types include hash partitioning (used to divide data
into partitions using a hashing function and providing an even distribution of data)
and list partitioning (enabling partitioning of data based on discrete values such as
geography).
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