What is disp parameter in JCL?

JCL DISP (Disposition) parameter is a Keyword parameter which is used to describe the status of a data set used in JCL to the OS. It has 3 sub parameters which indicates THE STATUS,Normal & abnormal termination ACTIVITIES of the JOB.

What is pass parameter in disp?

Purpose. Use the DISP parameter to describe the status of a data set to the system and tell the system what to do with the data set after termination of the step or job. You can specify one disposition for normal termination and another for abnormal termination.

What is the default value of DISP parameter in JCL?

When any of the sub-parameters of DISP are not specified, the default values are as follows: status : NEW is the default value. normal-disposition : If status is NEW, default normal-disposition is DELETE, else it is KEEP. abnormal-disposition : Same as normal disposition.

What does DISP Mod mean?

DISP = MOD is used to either extend an existing sequential dataset or to create a dataset if it does not exist. If the dataset exists, the records are appended to the dataset at the end of the existing dataset. If the volume parameter is used, the system terminates the job and does not create the new dataset.

What is dummy parameter in JCL?

The DSNAME or DSN keyword must be specified for an existing data set. The DUMMY parameter value tells z/OS not to perform any input, output, or disposition processing on the data set. Use the DUMMY parameter value when you are not providing input or do not want the output for a data set, or when testing a program.

What is dynambr in JCL?

The DYNAMNBR parameter is used to indicate how many Task I/O Table (TIOT) slots to reserve for data sets that may be dynamically allocated during the job step. The TIOT contains control blocks for every DD allocated in your jobstep ( dynamically or via JCL ) . If you fill the TIOT, no more files may be allocated until some are unallocated.

How does JCL’s Parm use?

the parm parameter is used to pass value to cobol.This technique uses a PARM=parameter keyword on the EXEC statement in JCL. The COBOL program requires a LINKAGE SECTION.