How to code the CONTIG, MXIG, and ALX subparameters

Code the CONTIG, MXIG, and ALX subparameters Example 1 //EMPMAST   DD    DSNAME=MMA1.EMPLOYEE.MASTER,DISP=(,CATLG,DELETE), //              U...

Code the CONTIG, MXIG, and ALX subparameters

Example 1

//EMPMAST  DD   DSNAME=MMA1.EMPLOYEE.MASTER,DISP=(,CATLG,DELETE),

//             UNIT=SYSDA,SPACE=(CYL,(100,20),,CONTIG)

The primary allocation (100 cylinders) must be obtained from contiguous cylinders.

Example 2

//EMPMAST  DD   DSNAME=MMA1.EMPLOYEE.MASTER,DISP=(,CATLG,DELETE),

//             UNIT=SYSDA,VOL=SER=MVS300,

//             SPACE=(CYL,(100,20),RLSE,MXIG)

Obtains the largest extent available on the volume for the file’s primary allocation. It must be at least 100 cylinders.

Example 3

//EMPMAST  DD   DSNAME=MMA1.EMPLOYEE.MASTER,DISP=(,CATLG,DELETE),

//             UNIT=SYSDA,VOL=SER=MVS300,

//             SPACE=(CYL,(100,20),RLSE,ALX)

Obtains up to five extents, each of which must be at least 100 cylinders, as the file’s primary allocation.