JCL Basics What is JCL? Job Entry Subsystem Job Processing JCL Statements JCL Parameters JOB Statement Job Statement Parameters for Job Positional Parameters ACCT NAME Keyword Parameters MSGLEVEL MSGCLASS TYPRUN PRTY CLASS RESTART REGION TIME NOTIFY EXEC Statement EXEC Statement Positional Parameters PGM PROC Keyword Parameters COND PARM ADDRSPC DD statement DD statement DD Parameters SPACE SYSIN VOL DCB SYSOUT DSN UNIT DISP |
JES is a component of the operating system. Some of its functions are listed below.
• Job management • Management of data used by job. • Managing the input and output job queues. • scheduling the jobs and control of job flow Operating system uses a job entry subsystem (JES) to do the Job Processing. Once user submits the job using job control statements, JES does following things: • receive the jobs into the OS • Schedule the jobs • Generate and control the output of jobs. |
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