CA Dynam for VSE User Guide

Reporting on Disk Files
The VTOCS report provides information about disk occupancy. Data can relate
to all mounted volumes, to all volumes in a pool, to generic volumes, or to a
specific real volume. One scan of all selected VTOCs can produce multiple
reports. Data is retrieved from system VTOCs in VTOC sequence by volume.
To enhance their capabilities, several options are available for each of these
reports. Complete descriptions are provided on the following pages.
Disk Space Usage Analysis—SPACEUSE
The SPACEUSE report is a standard, VTOC-based DYNPRINT report supplied
with CA Dynam. It helps you improve disk space utilization and disk file
performance by identifying files that are inefficiently blocked or inaccurately
allocated. Reports are restricted to disk files only.
Specific features let you do the following:
• Print in five different sort orders, including those that highlight files that
were badly blocked or badly allocated.
• Report on both over-allocation and under-allocation analysis.
• Determine actual maximum potential gain from reblocking files.
• Establish a common unit of measurement for sorted output, to compare
space usage of different device types (including FBA).
• Limit the report to an arbitrary number of files, to include only the worst
offenders.
• Restrict the report to a generic group of volumes or to the space in a CA
Dynam/D disk pool.
SPACEUSE supersedes the older DYNSPACE report. It takes full advantage of
the most recent CA Dynam/D VTOC management features. Information is
presented in an easily interpreted form.
Invoking the Report
Use the following DYNPRINT command sequence to invoke SPACEUSE:
ACCESS VTOC
REPORT SPACEUSE [ BANNER ]
[ EROPT ]
[ MAXLINES ]
[ MAXRETR ]
[ SELECT= {option[,option..] } ]
[ VOL ]
Chapter 5: Supporting Disk File Management 5–43