CTMROGR – Produce an Overnight Execution Graph

The Overnight Execution graph provides a clear and easy way to display job workloads for the purposes of planning or adjustment. The CTMROGR utility produces this graph.

Table execution times are graphically presented. The graph can be used to display both previous execution times, and anticipated future execution times.

The report can be used to point out problems in job execution flow (for example, certain jobs not executing at certain times, too many jobs executing at a given time, and so on), or simply to provide general information about job flow and workload. For example

• By running the report in the morning, the operations manager can get a picture of the production workload from the night before, and assess the need for adjustments to the job flow.
• On the 15th of the month, the report can simulate end-of-month processing, to facilitate planning.

The report is designed as follows:

• For specified intervals within a time range, the graph indicates whether any job executions for the table occurred during the interval.
• An asterisk (*) indicates job execution for the table during the time interval. A blank space indicates no job execution for the table during the interval.

The report can be requested in either of two presentation modes:

• Single mode

  Each table is represented on one line. For each table, no more than one * can appear in each time interval. An * indicates that at least one job in the table was executing during that time interval.

• Parallel mode

  The number of lines representing each table varies. For each table, the number of asterisks within a time interval varies according to the number of jobs in the table executing in that interval. Multiple asterisks for the same table and time interval appear on successive lines.

Note: Multiple asterisks for a time interval (in the same or different table) do not necessarily indicate simultaneous execution. They can indicate separate execution times within the same interval.

Input for the report is extracted from either the IOA Log file (for actual execution results) or the Simulation log (for forecasted results).

Report parameters are supplied using DD statement SYSIN (or DAOGRPRM). Columns 73 through 80 of each card are ignored.

Note: Jobs whose start times are chronologically after their end time (which is possible if a job is executing when the system clock is moved backwards) are ignored by CTMROGR.