Overview

This report shows how much DASD or TAPE I/O time was used by each data set for which activity was measured during the observation session. The quantification is based on the number of samples activity on the device was observed. This is expressed as a percentage of the total number of samples.

Two types of detail line are shown:

Data set
DDNAME

Initially, only the data set lines are visible. You can expand a data set line (using the “+” line command) to reveal its subordinate DDNAME lines.

A sample report is shown here, it has been fully expanded:

  File  View  Navigate  Help
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D03: DASD Usage Time by Dataset (0618/TSTJOB01)               Row 00001 of 00005
Command ===> __________________________________________________ Scroll ===> CSR 

Dataset_Name>DDNAme   Percent of Time * 10.00%  ±2.2%
                           *....1....2....3....4....5....6....7....8..
USER1.DATA.TESTPF      8.90 ====
→ VSAM1-02   BKNSM2    8.90 ====

USER1.TESTPF2.INFILE   1.25 ==
→ INFILE  BKNSM1       1.25 ==