JCL

The day-to-day application requirements in a corporate world that can be achieved using Utility Programs are illustrated below: 1. A file has 100 records. The first 10 records need to…

IBM Dataset Utilities Utility programs are pre-written programs, widely used in mainframes by system programmers and application developers to achieve day-to-day requirements, organising and maintaining data. A few of them…

Compiling COBOL Programs In order to execute a COBOL program in batch mode using JCL, the program needs to be compiled and a load module is created with all the…

Any batch program executed through a JCL requires data input, which is processed and an output is created. There are different methods of feeding input to the program and writing…

A dataset name specifies the name of a file and it is denoted by DSN in JCL. The DSN parameter refers to the physical dataset name of a newly created…

The Job Entry System uses two approaches to perform conditional processing in a JCL. When a job completes, a return code is set based on the status of execution. The…

Datasets are mainframe files with records organised in a specific format. Datasets are stored on the Direct Access Storage Device (DASD) or Tapes of the mainframe and are basic data…

Each JCL can be made of many job steps. Each job step can execute a program directly or can call a procedure, which in turn executes one or more programs…

JOB Statement is the first control statement in a JCL. This gives the identity of the job to the Operating System (OS), in the spool and in the scheduler. The…

Installing JCL on Windows/Linux There are many Free Mainframe Emulators available for Windows which can be used to write and learn sample JCLs. One such emulator is Hercules, which can…