JES

Work to be processed by a z/OS system has to be defined using Job Control Language (JCL). JCL is used to define which program to execute, which resources to allocate, whom to notify, and so forth. This description of work is called a job. z/OS uses a Job Entry Subsystem […]

A JES initiator performs several functions to ensure that multiple jobs run at the same time, without conflicts. To run multiple jobs asynchronously, the system must perform a number of functions: –    Select jobs from the input queues (JES does this). –    Ensure that multiple jobs (including TSO users and […]