How Did That Dataset Get There???
Project and Program:
Core Platform,
z/OS Systems Programming,
Storage Management,
Performance & Capacity Management
Tags:
Proceedings ,
SHARE Kansas City 2024
Administrators in large modern mainframe environments manage enormous amounts of
storage. This task would not be possible without the storage automation
facilities provided by DFSMS, which implements policies for datasets and
devices, including performance, availability, and volume selection. Most of the
time, the DFSMS ACS routines and SMS constructs accomplish this complex task
without issue. Occasionally, however, datasets may land on the 'wrong' volumes
or receive the 'wrong' classes, resulting in problems with disk space
utilization, dataset backup, recovery, replication, or performance. This session
will examine the process of DASD dataset creation, allocation, and device
selection - just how datasets get placed on particular devices. We'll look at
how things can go wrong, and some of the tools that can be used to investigate
and prevent errors.
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