INPUT

Blocked fixed-length records on disk

OUTPUT

Blocked fixed-length records on disk

WORK DATA SETS

Dynamically allocated

USER EXITS

None

FUNCTIONS/OPTIONS

CHALT, DYNALLOC, FILSZ

//EXAMP    JOB A400,PROGRAMMER                                  01
//RUNSORT  EXEC PGM=MYPGM                                       02
//STEPLIB  DD DSN=M999999.LOAD,DISP=SHR                         03
//SYSOUT   DD SYSOUT=A                                          04
//SYSPRINT DD SYSOUT=A                                          05
//SORTIN   DD DSN=M999999.INPUT(MASTER),DISP=OLD                06
//SORTOUT  DD DSN=M999999.OUTPUT.FILE,DISP=OLD                  07
//SORTCNTL DD *                                                 08
   OPTION  CHALT,DYNALLOC=(,3),FILSZ=U25000                     09

Line

Explanation

01

JOB statement. Introduces this job to the operating system.

02

EXEC statement. Calls a program named MYPGM that in turn calls DFSORT.

03

STEPLIB DD statement. Specifies the load library that contains MYPGM.

04

SYSOUT DD statement. Directs DFSORT messages and control statements to system output class A.

05

SYSPRINT DD statement. Directs MYPGM output to system output class A.

06

SORTIN DD statement. The input data set is member MASTER in the cataloged partitioned data set M999999.INPUT. DFSORT determines the RECFM, LRECL and BLKSIZE from the data set label.

07

SORTOUT DD statement. The output data set is named M999999.OUTPUT.FILE and is cataloged. DFSORT determines the RECFM, LRECL and BLKSIZE from the data set label.

08

SORTCNTL DD statement. DFSORT control statements follow. Statements in SORTCNTL override or supplement statements passed by MYPGM in the DFSORT parameter list it uses.

09

OPTION statement. CHALT specifies that character format control fields (specified in the SORT statement passed by MYPGM) are to be sorted using the ALTSEQ installation option. DYNALLOC=(,3) specifies that three work data sets are to be dynamically allocated using the installation default for the type of device. FILSZ=U25000 specifies a file size of 25000 records is to be used by DFSORT to determine the amount of work space needed. Because the input data set is a member of a PDS, specifying FILSZ helps DFSORT optimize work data set space.