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ILM is most frequently used to move
data among various devices that are most appropriate for hosting that data, such as
different classifications of disk. The reason for doing this is that most administrators
would like to have their most frequently accessed data on the fastest but most expensive
disk, and the least frequently accessed data on the on the slowest but cheapest
disk.
Oracle first began supporting ILM in 2006 for database releases dating back to
Oracle9i and introduced a tool, the ILM Assistant, that can be downloaded from the
Oracle Technology Network. In addition to the ILM Assistant, youwill need to have
Oracle Application Express (formerly HTML DB) installed in the database where the
data is managed.
The ILM Assistant presents a graphical user interface used in creating lifecycle definitions
and policies for database tables. It can advise when it is time to move, archive,
or delete data and also illustrate cost savings and storage required. The ILM Assistant
can also guide you in creating partitioning to match your ILM needs.


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