4. FILES › 5.2 VTS Component Files › 5.2.2 VTS Component IVT Information Area Files › 5.2.2.4 VTS Cache Usage File (IVTVCU) › 5.2.2.4.3 IVTVCU Usage Considerations

5.2.2.4.3 IVTVCU Usage Considerations

This section identifies any special considerations or
techniques related to using the IVTVCU file.

The overall DASD cache utilization for distributed VTSs
(STANDALONE, UI, and SECONDARY) are contained in the VTS
Distributed Library Activity file.

The IVTVCU file contains a further breakdown of DASD cache
activity by Cache Usage Preference Level Identifier
(IVTCUPL).  This file is only created for VTS's that are
operating at the IBM function code F/C 4001 level.