Specifying a VSAM KSDS for Side Information — SIDEINFO Statement

The SIDEINFO statement specifies the VSAM key sequenced data set (KSDS) in which side information entries are kept. The SIDEINFO statement contains the name of the side information file— DATASET(name).

If you do not specify the SIDEINFO statement, no default side information file name is activated.

Unlike TP profile files, only one side information file is allowed per z/OS system. The VSAM file must have be previously defined and be cataloged in either a user catalog or the master catalog.

You can name a different VSAM KSDS as the system side information file by overriding the DATASET parameter with another DATASET parameter.

For a sample VSAM file definition, see SYS1.SAMPLIB member ATBSIVSM.