7/31/2019 673556_673911_ppt

1/12

1

JCL AND JCL UTILITIES

PRESENTED BYJAGRUTI MOHANTY-674169

AUROPRIT BHANJADEO-676236

7/31/2019 673556_673911_ppt

2/12

INTRODUCTION TO JCL & JCL UTILITIES

JCL is a scripting language used on IBM mainframe operating systems toinstruct a system the system on how to run a batch job or start asubsystem.

There are actually two IBM JCL's: one for the operating system lineage thatbegins with DOS/360 and whose latest member is ; Z/VSE and the other for

the lineage from OS/360 to Z/OS. They share some basic syntax rules anda few basic concepts, but are otherwise very different.

There are 8 JCL statements. They are:-

1.Job 5.//* Comment

2.Exec 6./* Delimiter3.DD 7.// null ending statement

4.Pend 8. Proc

7/31/2019 673556_673911_ppt

3/12

JOB STATEMENT

Job is considered as a unit of work that has to be executed.

For execution a mainframe program requires all the resources to bespecified.

SYNTAX of job statement:

//name JOB parameters( positional, keyword) comments

Following are the parameters specified:1.Accounting Information.

2.CLASS: Categorization of the job.

3.MSGCLASS:is used to specify where the job output will be directed.

4.MSGLEVEL:Specification of printing the system messages.5.PRTY:Assignment of priority to the job.

6.TYPRUN: Holding the execution of the job for later execution.

7.NOTIFY:Send messages to the user.

7/31/2019 673556_673911_ppt

4/12

RULES FOR CODING JOB STATEMENT

First two columns should precede the positional parameter.

JOB NAME:have // followed by valid jobname.

JOB word must be coded before 16th column.

Keyword parameters should not

Jobname must start in 3rd column.

Valid names can be alphanumeric with max length 8 characters.

National characters are also allowed(@,# & $).

Positional Parameters:It has two parameters.

Accounting Information:used for billing to be run on the system.

SYNTAX:(account-number,additional-accounting-information)

or 'account-number,additional-accounting-information'

or account-number,additional-accounting-information

7/31/2019 673556_673911_ppt

5/12

UTILITIES

Utility is a useful tool that helps in expediting a task,i.emaintaining and organizing data.

Some of the key functions are:

1. Copy the sequential and partitioned data sets.

2. Catalog and catalog data sets.3. Rename and compress data sets.

4.Include and exclude members to partitioned data sets.

5.Compare sequential and partitioned dataset.

6.Create generation data group.SYNTAX :-

//stepname EXEC PGM=utility-name,

7/31/2019 673556_673911_ppt

6/12

IEBGENER

To copy from one sequential file to another.We specify the original and destination names.

The RECFM,LRECL attributes of both data sets must be same.

SYNTAX:-

//stepname EXEC PGM=IEBGENER

7/31/2019 673556_673911_ppt

7/12

IEBCOPY

To copy partitioned data sets or sequential we use it. this isknown as unloading.

It can be used to restore the PDSs to direct access devices.

this is know as loading.

To compress the datasets Include members of a PDS within a copy transaction

Exclude members of PDS within a copy transaction

7/31/2019 673556_673911_ppt

8/12

IEBCOPY has 4 main functions.

Copy partitioned data sets which is of two types i.e. loading andunloading.

Compress partitioned data sets. Include members of partitioned data sets within a copy of transaction.

Exclude members of partitioned data sets within a copy of transaction.

Unloading data sets:

It copies one PDS into another PDS with the help of COPY statement.//IEBCOPY1 JOB A123, 'J.FOSTER'

//STEP1 EXEC PGM=IEBCOPY

//SYSPRINT DD SYSOUT=A

//SYSUT1 DD DSN=COBOL.FILE1,

// DISP=SHR

//SYSUT2 DD DSN=COBOL.FILE2,

// DISP=(NEW,KEEP),

7/31/2019 673556_673911_ppt

9/12

// UNIT=TAPE1,VOL=SER=9999

//SYSIN DD *

COPY INDD=SYSUT1,

OUTDD=SYSUT2/*

//

LOADING DATA SETS:

Loading is used for restoration of partition data sets from tape to directaccess devices like disk.

//IEBCOPY1 JOB A123, 'J.FOSTER'

//STEP1 EXEC PGM=IEBCOPY

//SYSPRINT DD SYSOUT=A

//SYSUT1 DD DSN=COBOL.FILE1,

// DISP=OLD,

// UNIT=TAPE1,

// VOL=SER=8888

7/31/2019 673556_673911_ppt

10/12

//SYSUT2 DD DSN=COBOL.FILE1,// DISP=(NEW,CATLG),

// UNIT=DISK1,

// SPACE=(TRK, (40,10))

//SYSIN DD *COPY INDD=SYSUT1,

OUTDD=SYSUT2

/*

//

7/31/2019 673556_673911_ppt

11/12

IEBCOMPRThis utility is used to:

Compare two sequential data sets.

Compare two partitioned data sets.

If data sets are identical then return code will be 0 upon successfulexecution or else 8 will be returned upon non-identical data sets.

Data sets must have same record length and format for execution butblock size need not be same.

EXAMPLE

//jobname JOB (accounting-information),programmer name,keywordparameters....

//stepname EXEC PGM=IEBGENR

//SYSPRINT DD SYSOUT=PRINT DEVICE CLASS

//SYSUT1 DD DSN=DATA-SET1-FEATURES

//SYSUT2 DD DSN=DATA-SET2-FEATURES

//SYSIN DD *

COMPARE TYPORG=DATA-SET-TYPE*

7/31/2019 673556_673911_ppt

12/12

IEFBR14

This program is a null program. Origined from assembler language to be used for exiting a

procedure or program.

It executes a single statement which specifies end of program.

Since this program does nothing it can be used to check syntax ofJCL without affecting any data sets.