DFSMS introduction
This chapter gives a brief overview of the Data Facility Storage Management Subsystem (DFSMS) and its primary functions in the z/OS operating system. DFSMS is a suite of data and storage management functions for the z/OS operating system. It is composed of a base element and four optional features. DFSMS manages data from creation to expiration.
DFSMS is an operating environment that helps automate and centralize the management of storage based on the policies that your installation defines for availability, performance, space, ...