There are several ways to determine the compression for
applications that use the IBM® Tivoli® Storage Manager application
programming interface (API).
You can determine the compression by using one of the
following methods:
- An administrator during registration who can:
- Require that files are compressed
- Restrict the client from compressing files
- Allow the application user or the client user to determine the
compression status
- The client options file. If an administrator does not set compression
on or off, Tivoli Storage
Manager checks
the compression status that is set in the client options file. The
client options file is required, but the API user configuration file
is optional.
- One of the object attributes. When an application sends an object
to the server, some object attributes can be specified. One of the
object attributes is a flag that indicates whether or not the data
has already been compressed. If the application turns this flag on
during either a backup or an archive operation, then Tivoli Storage
Manager does not
compress the data a second time. This process overrides what the administrator
sets during registration.
For more information on setting options for the API and
on controlling compression, see IBM Tivoli Storage Manager Using the Application
Program Interface