Veritas Storage Foundation™ for Oracle 5.0.1 Administrator's Guide

Using Database Dynamic

Storage Tiering

This chapter includes the following topics:

■ About Database Dynamic Storage Tiering

■ Configuring Database Dynamic Storage Tiering

■ Dynamic Storage Tiering policy management

■ Running Database Dynamic Storage Tiering reports

■ Extent balancing in a database environment

■ Database Dynamic Storage Tiering use cases for Oracle

About Database Dynamic Storage Tiering

More and more data is being retained. Eventually, some of the data is no longer

needed as frequently, but still takes up a large amount of disk space. Database

Dynamic Storage Tiering matches data storage with the data's usage requirements

so that data is relocated based on requirements determined by the database

administrator (DBA). The feature enables you to manage your data so that

less-frequently used data can be moved to slower, less expensive disks, allowing

frequently-accessed data to be stored on the faster disks for quicker retrieval.

Storage classes are used to designate which disks make up a particular tier.

There are two common ways of defining storage classes:

■ Performance, or storage, cost class: The most-used class consists of fast,

expensive disks. When data is no longer needed on a regular basis, the data

can be moved to a different class that is made up of slower, less expensive

disks.

Chapter