Define and Maintain the Workload Best Practices › Job Requirements › Data Set Requirements for Jobs in the Queue

Data Set Requirements for Jobs in the Queue

Use data set requirements to sequence job executions correctly. When jobs are scheduled into the queue for execution, the requirements for this execution of the job (by SCHID) are attached. The master requirement count (MCNT) is incremented for each requirement. Data set requirements are checked to see whether they can be immediately (initially) satisfied.

One of the following is satisfied:

• If a nonzero LEADTM was specified on the DB.3.1 panel, has the data set been created within the specified time frame?
• If LEADTM is zero on the DB.3.1 panel, the data set been created after the last run of the dependent job?

Note: The times used in lead time checking are obtained from the database. The times that are compared can be seen in the LJOB command output under the LAST-RUN DATE/TIME heading. For a data set, use the LCTLG,DSN= command to see the last three creation dates and times.

Satisfaction Lead Time is also known as LEADTM and can be 0, 1-98, and 99. A 0 LEADTM signifies that the requirement must have been met after the last good run of the job that has the requirement. 1-98 is a number of hours that cannot be exceeded because the requirement was met. A value of 99 indicates that the requirement is never initially satisfied.

Business Value:

This best practice helps ensure the correct sequencing of jobs.