MVS JCL concepts
Summary
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Alberto Romano Schiesari – www.profars.com
1
Presentation
Thanks for using this presentation. You are free to use it.
I appreciate if you refer to the author when using it.
I’m sorry about the language errors; my english isn’t so good; I’ll
appreciate if you send me any corrections and suggestions to
optimize the comprehension to the reader.
The same is valid for any technical error; please help me to make
this an error-free text.
Alberto Romano Schiesari – São Paulo - Brazil
www.profars.com
arschiesari@yahoo.com
Summary
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Summary
IBM main operating systems
MVS line
Executing services demand
General flow
JES2
Input spool and Output spool
Input spool
Job submission - Roscoe
Stacking jobs at input spool
Contents of each job in the input spool
Initiators
Output spool
JCL
JOB
EXEC
DD
Library search
PROCS
Apendix - CONTROL’s
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Concepts
IBM main operating systems
see
http://publib.boulder.ibm.com/infocenter/zos/basics/index.jsp
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4
Concepts – IBM main operating systems
 IBM main operating systems
“DOS” or “VSE” line
DOS (1966)
DOS/VS (1972)
DOS/VSE (80’s)
VSE/ESA (1991)
z/VSE (2005)
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5
Concepts – IBM main operating systems
 IBM main operating systems
“VM” line
VM/370 (1972)
VM/SP (1980)
VM/XA (1988)
VM/ESA (1990)
z/VM (2000)
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Concepts – IBM
main operating systems
Conceitos
 IBM main operating systems
“Real-time” (transactional) line
ACP (1969)
TPF (1979)
z/TPF (2005)
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7
Concepts – IBM
main operating systems
Conceitos
 IBM main operating systems
Unix-like line
UTS (1981)
AIX/370 (1990)
AIX/ESA (1991)
LINUX (1999)
Open Solaris (2008)
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8
Concepts – IBM
main operating systems
Conceitos
 IBM main operating systems
MVS line
MFT (1966) ; OS/VS1 (1972) (end)
MVT (1967)
OS/VS2 R1 (SVS) (1972)
24-bit addressing; Single Address Space
MVS (OSVS2 R2) (1974)
24-bit addressing; Multiple Address Spaces
MVS/370 (1981)
.
MVS/XA (83)
Extended Architecture
MVS/ESA (1988)
Enterprise System Architeture; 31-bit addressing
OS/390 (1995)
.
z/OS (2000) ;
24-,31- 64-bit addressing
z/OS 1.10 (Sep 2008)
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9
Concepts – IBM
main operating systems
Conceitos
Each operating system has its own language to code
“scripts” and to be the formal tool to
(a) user ask operating system for service execution
(b) operating system return results and messages to the
user
This language, in MVS and derived operating systems, is
known as JCL (Job Control Language)
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10
Concepts – IBM
main operating systems
Conceitos
Curiosity: example of a DOS (PC’s) JCL (.bat files)
@echo off
cls
:a
ECHO Compiling %1
IF EXIST %1.OBJ DEL %1.OBJ
COBOL %1; ANIM COPYLIST > %1.LST
IF ERRORLEVEL 1 ECHO
*** Error
LINK %1+%COBDIR%\ADIS+%COBDIR%\ADISKEY+%COBDIR%\ADISINIT; >> %1.LST
rem TYPE %1.LST
shift
if not "%1" == "" goto a
@ECHO
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11
Concepts – IBM
main operating systems
Conceitos
Curiosity: sample JCL for UNIX line (Shell Script)
#!/bin/ksh
#--------------------------------------------------------------------#
# Rotina: rsyil02.sh - Salva arquivo de retorno do Mainframe
#
#--------------------------------------------------------------------#
BN=` basename $0 `
DN=` dirname $0 `
. $DN/raet.functions
FILE=/comunnications/bi/received/rsybi02
if [ -f $FILE.txt ] ; then
if [ -f $FILE.txt ] ; then
bkpcop
$FILE.txt || exit $?
scratf
$FILE.txt 12 || exit $?
else
echo "
Error. $FILE.txt does not exist"
exit 1
fi
\mv -f $FILE.txt $FILE
else
echo "
No transactions today."
exit 0
fi
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12
Concepts – IBM
main operating systems
Conceitos
Curiosity: example of JCL for the VSE line
>SUB,R,N
>* BKPD047 - BACKUP D047 TO T047
* $$ JOB JNM=BKPD047,CLASS=8,USER='44-R.WALKO'
* $$ PRT CLASS=B,DISP=H
// JOB BKPD047 BACKUP D047 TO T047
// DLBL D047,'D047.ADPDCS.INPUT ',,VSAM,CAT=PRODCAT,BUFSP=40960
// TLBL FILEB,'T047,U'
// EXEC EASYTREV
INCLUDE EZBKVSES D047 VS VB 750 8352 UNLOAD
/*
/&
* $$ EOJ
http://gsf-soft.com/Prism-CS/Samples/BKPD047.shtml
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13
Concepts – IBM
main operating systems
Conceitos
Curiosity: this is the equivament for the MVS line
//BKPD047 JOB (BKPD047),' ',CLASS=A,MSGCLASS=X,
// MSGLEVEL=(1,1),REGION=6M
//*
//JOBLIB INCLUDE MEMBER=JOBLIB
//STEP0010 EXEC PGM=SORT
//* MODULE EASYTREV PROCESSED BY PLUG-IN LCPEZT
//* VS VS I PRODCAT D047 'D047.ADPDCS.INPUT'
//SORTIN DD DSN=MVS.D047.ADPDCS.INPUT,DISP=SHR
//* MT O FILEB 'T047,U' //SORTOUT DD DSN=MVS.T047,
// DISP=(NEW,CATLG,DELETE),
// UNIT=TAPE
//* PR O
//SYSOUT DD SYSOUT=*
//* CD I
//SYSIN DD *
*INCLUDE EZBKVSES D047 VS VB 750 8352 UNLOAD
SORT FIELDS=COPY
RECORD TYPE=V,LENGTH=750
/*
//
http://gsf-soft.com/Prism-CS/Samples/BKPD047.shtml
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14
MVS line – executing services demand
Executing services demand
Summary
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MVS line – executing services demand
BE CAREFUL! ACHTUNG!
Everything you’re gonna see/read/listen
is OK for BACTH applications !
Summary
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16
MVS line – executing services demand
BE CAREFUL! ACHTUNG!
Everything you’re gonna see/read/listen
is OK for BACTH applications !
Summary
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17
MVS line – general flow
General flow
System
Service Input
(execution order)
Summary
Prev.Pg.
Result Output
basically: print (paper or
“terminal”)
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MVS line – general flow
General flow
SYSTEM
How do services
get into
the system?
Service Input
(execution order)
Summary
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19
MVS line – general flow
General flow
SYSTEM
How do results
get out of
the system?
Result Output
basically: print (paper or
“terminal”)
Summary
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20
MVS line – general flow
General flow
There is a specific software to execute those functions
(service input and result output).
It is JES2.
(Job Entry Subsystem)
Summary
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21
JES2
Therefore:
JES2
JES2
components that
receive the
inputs
Service Input
(execution order)
Summary
Prev.Pg.
JES2
components that
send the results
out
Result Output
(basically: print on paper
or “terminal”)
Alberto Romano Schiesari – www.profars.com
22
JES2
In other words:
z/OS
Operating system
Component 1 ...
Component 2 ...
JES2
Component n ...
Application 1
Service Input
(execution order)
Result Output
Application 2 ...
Apllication n (ex.:CICS) ...
(basically: print on paper
or “terminal”)
Application x (ex.: DB2) ...
Application z ...
Summary
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23
JES2
For example:
z/OS
Operating system
Component 1 ...
Component 2 ...
JES2
Component n ...
Application 1
Services input via
terminal (“sub”
command )
Application 2 ...
Apllication n (ex.:CICS) ...
Application x (ex.: DB2) ...
Application z ...
Summary
Prev.Pg.
Results output
browse via
terminal (job
sysout browse)
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24
JES2
But... We have to remember that:
z/OS
Operating system
Component 1 ...
Component 2 ...
JES2
Component n ...

Application 1
Application 2 ...
Apllication n (ex.:CICS) ...

Terminals for SUB
Application x (ex.: DB2) ...
Terminals for BROWSE
(they MUST be associated to
an application program !!!)
Application z ...
(they MUST be associated to
an application program !!!)
Summary
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25
JES2
What is (are) this (these) application program(s)?
z/OS
Operating system
Component 1 ...
Component 2 ...
JES2
Component n ...

Application 1
Application 2 ...
Apllication n (ex.:CICS) ...
What is the application
program responsible for
this terminal?
Summary
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Application x (ex.: DB2) ...
Application z ...

What is the application
program responsible for
this terminal?
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26
JES2
It may be Roscoe...
JES2

ROSCOE
Roscoe sends the
services to the JES2
Summary
Prev.Pg.

Roscoe gets the results
from JES2
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27
JES2
Or TSO...
JES2

TSO
TSO sends the services to
the JES2
Summary
Prev.Pg.

TSO gets the results from
JES2
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28
JES2
But, even either Roscoe or TSO...
JES2

Roscoe or TSO
The terminal is just a
visual interface
Summary
Prev.Pg.

The terminal is just a
visual interface
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29
JES2
Where are, in fact, the data?
JES2

Roscoe or TSO
Where is the stream we
built and submitted?
Summary
Prev.Pg.

Where is the sysout being
accessed to browse?
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30
JES2
In disk ! In the spool areas !
JES2

Roscoe or TSO
INPUT spool area
Summary
Prev.Pg.

Output spool area
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31
JOB input
Let’s see some details about spool input process
JES2

Summary
Input spool area
Roscoe or TSO
Prev.Pg.
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32
JOB input – TSO/ROSCOE
NOTE : use of ROSCOE
(data manipulation via AWS)...
Roscoe

Roscoe work area (AWS)
(create / FETCH/ATTACH)
Roscoe LIB’s
(proprietary data
organization)
(SAVE or UPDATE)
Summary
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33
JOB input – TSO/ROSCOE
NOTE : ... or TSO
(data manipulation directly in the “normal” datsets areas)
TSO

Partitioned dataset
member
Sequential dataset
Summary
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34
JOB input – TSO/ROSCOE
NOTE : we’ll refer to data manipulation using
Roscoe or TSO using this figure
TSO/Roscoe

Edited data
To be submitted
Summary
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35
JOB input – TSO/ROSCOE
Step 1 = edit data to be submitted
TSO/Roscoe

Edited data
To be submitted
Summary
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36
JOB input – TSO/ROSCOE
Step 1 = edit data to be submitted

Summary
TSO/Roscoe
Prev.Pg.
//PSTARS3T
JOB
(1234),'ALBERTO',CLASS=T,MSGCLASS=O
//STEP1 EXEC ASMACLG
//C.SYSIN DD *
PROGRAMA START 0
ENTRAR
BAL
R14,ROTMAIN
PROG PROPRIAMENTE DITO
SAIR
DC
A(0)
SAVEAREA DO ENDERECO VOLTA
ROTMAIN ST
R14,*-4
SALVA ENDERECO VOLTA
OPEN (AGENCIAS,INPUT)
ABRE ARQUIVO
LEITURA BAL
14,LEREG
LE REGISTRO
CLI
FLAGFIM,C'Y'
END OF FILE?
BE
ACABAR
SE SIM, TERMINAR O PROGRAMA
AP
LIDOS,=P'1'
CONTA REGISTROS LIDOS
B
LEITURA
VOLTA A LER
ACABAR
CLOSE (AGENCIAS)
FECHA ARQUIVO
L
R14,ROTMAIN-4
RESTAURA ENDERECO VOLTA
BR
R14
VOLTA
DC
A(0)
SAVEAREA DO ENDERECO DE VOLTA
LEREG
ST
R14,*-4
SALVA ENDERECO DE VOLTA
B
SAILER
VAI PARA SAIDA
FIMAG
MVI
FLAGFIM,C'Y'
MARCA QUE ARQUIVO ACABOU
SAILER
L
R14,LEREG-4
RESTAURA ENDERECO VOLTA
BR
R14
VOLTA
* DECLARACAO DE ARQUIVOS E AREAS
RELAT
DCB LRECL=133,DSORG=PS,RECFM=FA,DDNAME=SYSPRINT,MACRF=PM
AGENCIAS DCB LRECL=80,DSORG=PS,DDNAME=AGENCIAS,MACRF=GM,EODAD=FIMAG
FLAGFIM DC C'N'
FLAG INDICA FIM ARQ ENTRADA
LAG
DS CL80
AREA PARA LEITURA ARQUIVO
END ,
ULTIMO STMT FONTE
//G.SYSPRINT DD SYSOUT=*
//G.SYSOUT
DD SYSOUT=*
//G.AGENCIAS DD *
0001NOME DA AGENCIA 0001---------*
0002NOME DA AGENCIA 0002---------*
0003NOME DA AGENCIA 0003---------*
0004NOME DA AGENCIA 0004---------*
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37
JOB input – TSO/ROSCOE
Another sight...

Roscoe
JOB Statement
1st step components (assembly =
execution of Assembler program)
2nd step components (linkedit = execution
of linkeditor program)
3rd step components (my program)
Summary
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38
JOB input – TSO/ROSCOE
A c-a-r-e-f-u-l analysys of the data to be submitted...

Summary
TSO/Roscoe
Prev.Pg.
//PSTARS3T
JOB
(1234),'ALBERTO',CLASS=T,MSGCLASS=O
//STEP1 EXEC ASMACLG
//C.SYSIN DD *
PROGRAMA START 0
ENTRAR
BAL
R14,ROTMAIN
PROG PROPRIAMENTE DITO
SAIR
DC
A(0)
SAVEAREA DO ENDERECO VOLTA
ROTMAIN ST
R14,*-4
SALVA ENDERECO VOLTA
OPEN (AGENCIAS,INPUT)
ABRE ARQUIVO
LEITURA BAL
14,LEREG
LE REGISTRO
CLI
FLAGFIM,C'Y'
END OF FILE?
BE
ACABAR
SE SIM, TERMINAR O PROGRAMA
AP
LIDOS,=P'1'
CONTA REGISTROS LIDOS
B
LEITURA
VOLTA A LER
ACABAR
CLOSE (AGENCIAS)
FECHA ARQUIVO
L
R14,ROTMAIN-4
RESTAURA ENDERECO VOLTA
BR
R14
VOLTA
DC
A(0)
SAVEAREA DO ENDERECO DE VOLTA
LEREG
ST
R14,*-4
SALVA ENDERECO DE VOLTA
B
SAILER
VAI PARA SAIDA
FIMAG
MVI
FLAGFIM,C'Y'
MARCA QUE ARQUIVO ACABOU
SAILER
L
R14,LEREG-4
RESTAURA ENDERECO VOLTA
BR
R14
VOLTA
* DECLARACAO DE ARQUIVOS E AREAS
RELAT
DCB LRECL=133,DSORG=PS,RECFM=FA,DDNAME=SYSPRINT,MACRF=PM
AGENCIAS DCB LRECL=80,DSORG=PS,DDNAME=AGENCIAS,MACRF=GM,EODAD=FIMAG
FLAGFIM DC C'N'
FLAG INDICA FIM ARQ ENTRADA
LAG
DS CL80
AREA PARA LEITURA ARQUIVO
END ,
ULTIMO STMT FONTE
//G.SYSPRINT DD SYSOUT=*
//G.SYSOUT
DD SYSOUT=*
//G.AGENCIAS DD *
0001NOME DA AGENCIA 0001---------*
0002NOME DA AGENCIA 0002---------*
0003NOME DA AGENCIA 0003---------*
0004NOME DA AGENCIA 0004---------*
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JOB input – TSO/ROSCOE
Another sight, the stream as a whole ...

TSO/Roscoe
//PSTARS3T
JOB
(1234),'ALBERTO',
//
CLASS=T,MSGCLASS=O
//STEP1 EXEC ASMACLG
//C.SYSIN DD *
Step C, SYSIN dataset data
//G.SYSPRINT DD SYSOUT=*
//G.SYSOUT
DD SYSOUT=*
//G.AGENCIAS DD *
Step G, AGENCIAS dataset data
Red = JCL
Blue = data
Summary
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40
JOB input – TSO/ROSCOE
Another way to view the data ...

TSO/Roscoe
//PSTARS3T
JOB
(1234),‘ALBERTO',
//
CLASS=T,MSGCLASS=O
//STEP1 EXEC ASMACLG
//C.SYSIN DD *
//G.SYSPRINT DD SYSOUT=*
//G.SYSOUT
DD SYSOUT=*
//G.AGENCIAS DD *
Step C, SYSIN dataset data
Step G, AGENCIAS dataset data
Red = JCL
Blue = data
Summary
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41
JOB input – TSO/ROSCOE
Getting back to the relationship between Roscoe and JES...

Summary
TSO/Roscoe
Prev.Pg.
//PSTARS3T
JOB
(9526),'ALBERTO',CLASS=T,MSGCLASS=O
//STEP1 EXEC ASMACLG
//C.SYSIN DD *
PROGRAMA START 0
ENTRAR
BAL
R14,ROTMAIN
PROG PROPRIAMENTE DITO
SAIR
DC
A(0)
SAVEAREA DO ENDERECO VOLTA
ROTMAIN ST
R14,*-4
SALVA ENDERECO VOLTA
OPEN (AGENCIAS,INPUT)
ABRE ARQUIVO
LEITURA BAL
14,LEREG
LE REGISTRO
CLI
FLAGFIM,C'Y'
END OF FILE?
BE
ACABAR
SE SIM, TERMINAR O PROGRAMA
AP
LIDOS,=P'1'
CONTA REGISTROS LIDOS
B
LEITURA
VOLTA A LER
ACABAR
CLOSE (AGENCIAS)
FECHA ARQUIVO
L
R14,ROTMAIN-4
RESTAURA ENDERECO VOLTA
BR
R14
VOLTA
DC
A(0)
SAVEAREA DO ENDERECO DE VOLTA
LEREG
ST
R14,*-4
SALVA ENDERECO DE VOLTA
B
SAILER
VAI PARA SAIDA
FIMAG
MVI
FLAGFIM,C'Y'
MARCA QUE ARQUIVO ACABOU
SAILER
L
R14,LEREG-4
RESTAURA ENDERECO VOLTA
BR
R14
VOLTA
* DECLARACAO DE ARQUIVOS E AREAS
RELAT
DCB LRECL=133,DSORG=PS,RECFM=FA,DDNAME=SYSPRINT,MACRF=PM
AGENCIAS DCB LRECL=80,DSORG=PS,DDNAME=AGENCIAS,MACRF=GM,EODAD=FIMAG
FLAGFIM DC C'N'
FLAG INDICA FIM ARQ ENTRADA
FLAG
DS CL80
AREA PARA LEITURA ARQUIVO
END ,
ULTIMO STMT FONTE
//G.SYSPRINT DD SYSOUT=*
//G.SYSOUT
DD SYSOUT=*
//G.AGENCIAS DD *
0001NOME DA AGENCIA 0001---------*
0002NOME DA AGENCIA 0002---------*
0003NOME DA AGENCIA 0003---------*
0004NOME DA AGENCIA 0004---------*
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JOB input – TSO/ROSCOE
Roscoe submits (delivers) the stream that came from AWS to JES...
JES2
Input spool area

Summary
SUB
TSO/Roscoe
Edited data
Prev.Pg.
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43
JOB input – TSO/ROSCOE
The JES component that reads the things somebody (Roscoe, TSO...)
submitted is (are) the READER(s) / INTERPRETER(s)
JES2
Input spool area
Reader

Summary
SUB
TSO/Roscoe
AWS
Prev.Pg.
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JOB input – TSO/ROSCOE
There are several READER/INTERPRETER(s); they get the records from
the submitted JOBs; while reading, they validate some information before
send to the spool (that’s because the “interpreter”)
JES2
Input spool area
Readers
“Normal” datasets
Roscoe
AWS


SUB
Summary
TSO
SUB
Prev.Pg.
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JOB input
Let’s see better the input spool area
JES2
Input spool area
Readers
“Normal” datasets
Roscoe
AWS


SUB
Summary
TSO
SUB
Prev.Pg.
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46
JOB input
Input spool area : the archieving unit is the JOB
JOB0001
JOB0002
JOB0003
JOB0004
JOB0006
JOB0007
JOB0008
Etc...
Summary
Prev.Pg.
JOB0005
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47
JOB input
The JOBS are queued based on the entry sequence; each Job receive an
Id #, that will follow it throughout its whole life.
JOB0001
JOB0002
JOB0003
JOB0004
JOB0006
JOB0007
JOB0008
Etc...
Summary
Prev.Pg.
JOB0005
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JOB input
The JOBS remains in the queue awaiting execution.
JOB0001
JOB0002
JOB0003
JOB0004
JOB0006
JOB0007
JOB0008
Etc...
Summary
Prev.Pg.
JOB0005
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49
JOB input
Let’s see some details about how the Jobs are stored.
Let’s detail one of them (JOB0001):
JOB0001
ALL JCL records
(statements)
(one single dataset)
Summary
Prev.Pg.
For each in-stream dataset in the submitted stream, is
created a file identified with stepname + DDname
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JOB input
Example: if this stream (ref. JOB0001) is submitted
//PSTARS3T JOB (1234),'ALBERTO',CLASS=T,MSGCLASS=O
//STEP1
EXEC PGM=PGTST01,PARM=‘TOT=YES'
//STEP2
EXEC PGM=PGTST02
Summary
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51
JOB input
The input spool data related to JOB0001 is as follows:
//PSTARS3T JOB (1234),'ALBERTO',CLASS=T,MSGCLASS=O
//STEP1
EXEC PGM=PGTST01,PARM=‘TOT=YES'
//STEP2
EXEC PGM=PGTST02
JOB0001
//PSTARS3T JOB (123),'ALBERTO',CLASS=T,MSGCLASS=O
//STEP1 EXEC PGM=PGTST01,PARM=‘TOT=YES‘
//STEP2 EXEC PGM=PGTST02
There is no datasets related to in-stream data, because there is no in-stream data
Summary
Prev.Pg.
Alberto Romano Schiesari – www.profars.com
52
JOB input
Example: if this stream is submitted (ref. JOB0002)
//PSTARS3T
//STEP1
//STEP2
//STEP3
//SYSOUT
//SYSPRINT
//SYSIN DD
DELETE
Summary
JOB (1234),'ALBERTO',CLASS=T,MSGCLASS=O
EXEC PGM=PGTST01,PARM=‘TOT=YES'
EXEC PGM=PGTST02
EXEC PGM=IDCAMS
DD SYSOUT=*
DD SYSOUT=*
*
DES.ALB.A001 PURGE
/* DELETE DATASET */
Prev.Pg.
Alberto Romano Schiesari – www.profars.com
53
JOB input
The input spool related to JOB0002 is as follows:
//PSTARS3T
//STEP1
//STEP2
//STEP3
//SYSOUT
//SYSPRINT
//SYSIN DD
DELETE
JOB (1234),'ALBERTO',CLASS=T,MSGCLASS=O
EXEC PGM=PGTST01,PARM=‘TOT=YES'
EXEC PGM=PGTST02
EXEC PGM=IDCAMS
DD SYSOUT=*
DD SYSOUT=*
*
DES.ALB.A001 PURGE
/* DELETA DATASET */
JOB0002
//PSTARS3T
//STEP1
//STEP2
//STEP3
//SYSOUT
//SYSPRINT
//SYSIN DD
JOB
EXEC
EXEC
EXEC
DD
DD
*
(1234),'ALBERTO',CLASS=T,MSGCLASS=O
PGM=PGTST01,PARM=‘TOT=YES'
PGM=PGTST02
PGM=IDCAMS
SYSOUT=*
SYSOUT=*
Step=STEP3 ; DD=SYSIN
DELETE
Summary
DES.ALB.A001 PURGE
Prev.Pg.
/* DELETA DATASET */
Alberto Romano Schiesari – www.profars.com
54
JOB input
Getting back to the original JOB, that with the 3 steps (compile, link & go of an
assembler program); suppose that the id is JOB1234
//PSTARS3T
JOB
(1234),'ALBERTO',CLASS=T,MSGCLASS=O
//STEP1 EXEC ASMACLG
//C.SYSIN DD *
PROGRAMA START 0
ENTRAR
BAL
R14,ROTMAIN
PROG PROPRIAMENTE DITO
SAIR
DC
A(0)
SAVEAREA DO ENDERECO VOLTA
ROTMAIN ST
R14,*-4
SALVA ENDERECO VOLTA
OPEN (AGENCIAS,INPUT)
ABRE ARQUIVO
LEITURA BAL
14,LEREG
LE REGISTRO
CLI
FLAGFIM,C'Y'
END OF FILE?
BE
ACABAR
SE SIM, TERMINAR O PROGRAMA
AP
LIDOS,=P'1'
CONTA REGISTROS LIDOS
B
LEITURA
VOLTA A LER
ACABAR
CLOSE (AGENCIAS)
FECHA ARQUIVO
L
R14,ROTMAIN-4
RESTAURA ENDERECO VOLTA
BR
R14
VOLTA
DC
A(0)
SAVEAREA DO ENDERECO DE VOLTA
LEREG
ST
R14,*-4
SALVA ENDERECO DE VOLTA
B
SAILER
VAI PARA SAIDA
FIMAG
MVI
FLAGFIM,C'Y'
MARCA QUE ARQUIVO ACABOU
SAILER
L
R14,LEREG-4
RESTAURA ENDERECO VOLTA
BR
R14
VOLTA
* DECLARACAO DE ARQUIVOS E AREAS
RELAT
DCB LRECL=133,DSORG=PS,RECFM=FA,DDNAME=SYSPRINT,MACRF=PM
AGENCIAS DCB LRECL=80,DSORG=PS,DDNAME=AGENCIAS,MACRF=GM,EODAD=FIMAG
FLAGFIM DC C'N'
FLAG INDICA FIM ARQUIVO ENTRADA
LAG
DS CL80
AREA PARA LEITURA ARQUIVO
END ,
ULTIMO STMT FONTE
//G.SYSPRINT DD SYSOUT=*
//G.SYSOUT
DD SYSOUT=*
//G.AGENCIAS DD *
0001NOME DA AGENCIA 0001---------*
0002NOME DA AGENCIA 0002---------*
0003NOME DA AGENCIA 0003---------*
0004NOME DA AGENCIA 0004---------*
Summary
Prev.Pg.
Alberto Romano Schiesari – www.profars.com
55
JOB input
It has JCL and in-stream data
//PSTARS3T
JOB
(1234),'ALBERTO',CLASS=T,MSGCLASS=O
//STEP1 EXEC ASMACLG
//C.SYSIN DD *
PROGRAMA START 0
ENTRAR
BAL
R14,ROTMAIN
PROG PROPRIAMENTE DITO
SAIR
DC
A(0)
SAVEAREA DO ENDERECO VOLTA
ROTMAIN ST
R14,*-4
SALVA ENDERECO VOLTA
OPEN (AGENCIAS,INPUT)
ABRE ARQUIVO
LEITURA BAL
14,LEREG
LE REGISTRO
CLI
FLAGFIM,C'Y'
END OF FILE?
BE
ACABAR
SE SIM, TERMINAR O PROGRAMA
AP
LIDOS,=P'1'
CONTA REGISTROS LIDOS
B
LEITURA
VOLTA A LER
ACABAR
CLOSE (AGENCIAS)
FECHA ARQUIVO
L
R14,ROTMAIN-4
RESTAURA ENDERECO VOLTA
BR
R14
VOLTA
DC
A(0)
SAVEAREA DO ENDERECO DE VOLTA
LEREG
ST
R14,*-4
SALVA ENDERECO DE VOLTA
B
SAILER
VAI PARA SAIDA
FIMAG
MVI
FLAGFIM,C'Y'
MARCA QUE ARQUIVO ACABOU
SAILER
L
R14,LEREG-4
RESTAURA ENDERECO VOLTA
BR
R14
VOLTA
* DECLARACAO DE ARQUIVOS E AREAS
RELAT
DCB LRECL=133,DSORG=PS,RECFM=FA,DDNAME=SYSPRINT,MACRF=PM
AGENCIAS DCB LRECL=80,DSORG=PS,DDNAME=AGENCIAS,MACRF=GM,EODAD=FIMAG
FLAGFIM DC C'N'
FLAG INDICA FIM ARQUIVO ENTRADA
LAG
DS CL80
AREA PARA LEITURA ARQUIVO
END ,
ULTIMO STMT FONTE
//G.SYSPRINT DD SYSOUT=*
//G.SYSOUT
DD SYSOUT=*
//G.AGENCIAS DD *
0001NOME DA AGENCIA 0001---------*
0002NOME DA AGENCIA 0002---------*
0003NOME DA AGENCIA 0003---------*
0004NOME DA AGENCIA 0004---------*
Summary
Prev.Pg.
Alberto Romano Schiesari – www.profars.com
56
JOB input
The input spool related to JOB1234 is (almost...) as follows:
JOB1234
//PSTARS3T JOB (1234),‘ALBERTO',CLASS=T,MSGCLASS=O
//STEP1 EXEC ASMACLG
//C.SYSIN DD *
//G.SYSPRINT DD SYSOUT=*
//G.SYSOUT
DD SYSOUT=*
//G.AGENCIAS DD *
Step=C ; DD=SYSIN
PROGRAMA START 0
ENTRAR
BAL
R14,ROTMAIN
PROG PROPRIAMENTE DITO
SAIR
DC
A(0)
SAVEAREA DO ENDERECO VOLTA
ROTMAIN ST
R14,*-4
SALVA ENDERECO VOLTA
OPEN (AGENCIAS,INPUT)
ABRE ARQUIVO
LEITURA BAL
14,LEREG
LE REGISTRO
CLI
FLAGFIM,C'Y'
END OF FILE?
BE
ACABAR
SE SIM, TERMINAR O PROGRAMA
AP
LIDOS,=P'1'
CONTA REGISTROS LIDOS
B
LEITURA
VOLTA A LER
ACABAR
CLOSE (AGENCIAS)
FECHA ARQUIVO
L
R14,ROTMAIN-4
RESTAURA ENDERECO VOLTA
BR
R14
VOLTA
DC
A(0)
SAVEAREA DO ENDERECO DE VOLTA
LEREG
ST
R14,*-4
SALVA ENDERECO DE VOLTA
B
SAILER
VAI PARA SAIDA
FIMAG
MVI
FLAGFIM,C'Y'
MARCA QUE ARQUIVO ACABOU
SAILER
L
R14,LEREG-4
RESTAURA ENDERECO VOLTA
BR
R14
VOLTA
* DECLARACAO DE ARQUIVOS E AREAS
RELAT
DCB LRECL=133,DSORG=PS,RECFM=FA,DDNAME=SYSPRINT,MACRF=PM
AGENCIAS DCB LRECL=80,DSORG=PS,DDNAME=AGENCIAS,MACRF=GM,EODAD=FIMAG
FLAGFIM DC C'N'
FLAG INDICA FIM ARQUIVO ENTRADA
LAG
DS CL80
AREA PARA LEITURA ARQUIVO
END ,
Summary
Step=G ; DD=AGENCIAS
0001NOME
0002NOME
0003NOME
0004NOME
DA
DA
DA
DA
AGENCIA
AGENCIA
AGENCIA
AGENCIA
0001---------*
0002---------*
0003---------*
0004---------*
ULTIMO STMT FONTE
Prev.Pg.
Alberto Romano Schiesari – www.profars.com
57
JOB input
In fact, JCL is already EXPANDED (details when we’ll see PROCs)
JOB1234
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
//PSTARS3T
JOB
(1234),'ALBERTO',CLASS=T,MSGCLASS=O
//STEP1 EXEC ASMACLG
XXASMACLG PROC
XXC
EXEC PGM=ASMA90
XXSYSLIB
DD DSN=SYS1.MACLIB,DISP=SHR
XXSYSUT1
DD DSN=&&SYSUT1,SPACE=(4096,(120,120),,,ROUND),
XX
UNIT=SYSALLDA,DCB=BUFNO=1
XXSYSPRINT DD SYSOUT=*
XXSYSLIN
DD DSN=&&OBJ,SPACE=(3040,(40,40),,,ROUND),
XX
UNIT=SYSALLDA,DISP=(MOD,PASS),
XX
DCB=(BLKSIZE=3040,LRECL=80,RECFM=FB,BUFNO=1)
//C.SYSIN DD *
XXL
EXEC PGM=HEWL,PARM='MAP,LET,LIST',COND=(8,LT,C)
XXSYSLIN
DD DSN=&&OBJ,DISP=(OLD,DELETE)
XX
DD DDNAME=SYSIN
XXSYSLMOD DD DISP=(,PASS),UNIT=SYSALLDA,SPACE=(CYL,(1,1,1)),
XX
DSN=&&GOSET(GO)
XXSYSUT1
DD DSN=&&SYSUT1,SPACE=(1024,(120,120),,,ROUND),
XX
UNIT=SYSALLDA,DCB=BUFNO=1
XXSYSPRINT DD SYSOUT=*
XXG
EXEC PGM=*.L.SYSLMOD,COND=((8,LT,C),(8,LT,L))
//G.SYSPRINT DD SYSOUT=*
//G.SYSOUT
DD SYSOUT=*
//G.AGENCIAS DD *
Summary
Prev.Pg.
Alberto Romano Schiesari – www.profars.com
58
JOB input
FINALLY !!! JOB1234 “final” format is:
JOB1234
1
2
3
4
5
6
//PSTARS3T
JOB
(1234),'ALBERTO',CLASS=T,MSGCLASS=O
//STEP1 EXEC ASMACLG
XXASMACLG PROC
XXC
EXEC PGM=ASMA90
XXSYSLIB
DD DSN=SYS1.MACLIB,DISP=SHR
XXSYSUT1
DD DSN=&&SYSUT1,SPACE=(4096,(120,120),,,ROUND),
XX
UNIT=SYSALLDA,DCB=BUFNO=1
7 XXSYSPRINT DD SYSOUT=*
8 XXSYSLIN
DD DSN=&&OBJ,SPACE=(3040,(40,40),,,ROUND),
XX
UNIT=SYSALLDA,DISP=(MOD,PASS),
XX
DCB=(BLKSIZE=3040,LRECL=80,RECFM=FB,BUFNO=1)
9 //C.SYSIN DD *
10 XXL
EXEC PGM=HEWL,PARM='MAP,LET,LIST',COND=(8,LT,C)
11 XXSYSLIN
DD DSN=&&OBJ,DISP=(OLD,DELETE)
12 XX
DD DDNAME=SYSIN
13 XXSYSLMOD DD
DISP=(,PASS),UNIT=SYSALLDA,SPACE=(CYL,(1,1,1)),
XX
DSN=&&GOSET(GO)
14 XXSYSUT1
DD DSN=&&SYSUT1,SPACE=(1024,(120,120),,,ROUND),
XX
UNIT=SYSALLDA,DCB=BUFNO=1
15 XXSYSPRINT DD SYSOUT=*
16 XXG
EXEC PGM=*.L.SYSLMOD,COND=((8,LT,C),(8,LT,L))
17 //G.SYSPRINT DD SYSOUT=*
18 //G.SYSOUT
DD SYSOUT=*
19 //G.AGENCIAS DD *
Step=C ; DD=SYSIN
PROGRAMA START 0
ENTRAR
BAL
R14,ROTMAIN
PROG PROPRIAMENTE DITO
SAIR
DC
A(0)
SAVEAREA DO ENDERECO VOLTA
ROTMAIN ST
R14,*-4
SALVA ENDERECO VOLTA
OPEN (AGENCIAS,INPUT)
ABRE ARQUIVO
LEITURA BAL
14,LEREG
LE REGISTRO
CLI
FLAGFIM,C'Y'
END OF FILE?
BE
ACABAR
SE SIM, TERMINAR O PROGRAMA
AP
LIDOS,=P'1'
CONTA REGISTROS LIDOS
B
LEITURA
VOLTA A LER
ACABAR
CLOSE (AGENCIAS)
FECHA ARQUIVO
L
R14,ROTMAIN-4
RESTAURA ENDERECO VOLTA
BR
R14
VOLTA
DC
A(0)
SAVEAREA DO ENDERECO DE VOLTA
LEREG
ST
R14,*-4
SALVA ENDERECO DE VOLTA
B
SAILER
VAI PARA SAIDA
FIMAG
MVI
FLAGFIM,C'Y'
MARCA QUE ARQUIVO ACABOU
SAILER
L
R14,LEREG-4
RESTAURA ENDERECO VOLTA
BR
R14
VOLTA
* DECLARACAO DE ARQUIVOS E AREAS
RELAT
DCB LRECL=133,DSORG=PS,RECFM=FA,DDNAME=SYSPRINT,MACRF=PM
AGENCIAS DCB LRECL=80,DSORG=PS,DDNAME=AGENCIAS,MACRF=GM,EODAD=FIMAG
FLAGFIM DC C'N'
FLAG INDICA FIM ARQUIVO ENTRADA
LAG
DS CL80
AREA PARA LEITURA ARQUIVO
END ,
ULTIMO STMT FONTE
Step=G ; DD=AGENCIAS
0001NOME
0002NOME
0003NOME
0004NOME
Summary
Prev.Pg.
DA
DA
DA
DA
AGENCIA
AGENCIA
AGENCIA
AGENCIA
0001---------*
0002---------*
0003---------*
0004---------*
Alberto Romano Schiesari – www.profars.com
59
JOB input
OK? No doubts? We’ll talk about that again soon...
JOB1234
1 dataset with all JCL,
already expanded
Summary
Prev.Pg.
Step=ssssssss ; DD=dddddddd
1 dataset for each in-stream
dataset
Alberto Romano Schiesari – www.profars.com
60
JOB input
Getting back to the matter, there was a queue of JOBs waiting for execution...
JOB0001
JOB0002
JOB0003
JOB0004
JOB0006
JOB0007
JOB0008
Etc...
Summary
Prev.Pg.
JOB0005
Alberto Romano Schiesari – www.profars.com
61
JOB input
For job execution, there are other system components: the
INITIATORs
z/OS
Operating System
Component 1 ...
Selection for
execution
Initiator’s
JES2
Input spool
area JOBS
Component n ...
Application program 1
Application program o 2 ...
Application program n (ex.:CICS) ...
Application program x (ex.: DB2) ...
Application program z ...
Summary
Prev.Pg.
Alberto Romano Schiesari – www.profars.com
62
Execution
They (the INITIATORs) do the selection (pick up 1 at a time) of
the “waiting-for-execution” job(s) and begin their execution.
Initiator’s
Selection for
execution
Input spool
Area JOBS
What is the criteria for the selection?
The JOB class.
Summary
Prev.Pg.
Alberto Romano Schiesari – www.profars.com
63
Execution
Each initiator deals with some pre-defined classes. Ex.
INIT 1 = jobs classes A, B and C
INIT 2 = jobs classes D, E and F
Input spool:
Job queue (jobs waiting for execution)
JOB0001 (class A)
JOB0002 (class B)
INIT 1 : server for jobs class A, B and C; in the
example, this INIT will select the jobs 0001 e
0002.
JOB0003 (class R)
JOB0004 (class D)
JOB0005 (class E)
INIT 2 : server for jobs class D, E and F; in the
example, this INIT will select the jobs 0004 e
0005.
JOB0006 (class T)
Etc...
Summary
While there is no INIT serving classes R and/or
T, the jobs 0003 and 0006 won’t be executed
(selected for execution)
Prev.Pg.
Alberto Romano Schiesari – www.profars.com
64
Execution
Example: see the list of INITs as shown by Roscoe’ DIS INIT command:
> APPLID(EMPROSCD)
USER(OB3,ARS243)
>
....+....1....+....2....+....3....+....4....+....5....+....6....+....7....+....8
INIT 1
ACTIVE
JOB00716 ADP#6IA (1) PVAG1
0:17:13 C=12345
INIT 2
ACTIVE
JOB01873 NDVJD000 (1) COPYDIR
0:05:04 C=21345
INIT 3
ACTIVE
JOB00809 SCO#END (1) NDVRBAT
0:01:15 C=32154
INIT 4
INACTIVE
C=0
INIT 5
INACTIVE
C=85
INIT 6
ACTIVE
JOB00789 OCC#SCL (9) NDVRBAT
0:05:05 C=9
INIT 7
INACTIVE
C=QP
INIT 8
ACTIVE
JOB00812 FIN#T305 (S) STEP002
0:01:00 C=QS
INIT 9
INACTIVE
C=QR
INIT 10
ACTIVE
JOB00605 CPC#BUS (A) NDVRBAT
0:28:38 C=YA
INIT 11
ACTIVE
JOB00771 SCO#ALB (Y) NDVRBAT
0:08:08 C=YU
INIT 12
ACTIVE
JOB00819 NDVJPKPR (Z) BC1JPCKG
0:00:05 C=ZB
INIT 13
INACTIVE
C=CT
INIT 14
INACTIVE
C=ZN
INIT 15
ACTIVE
JOB00782 SCO#A005 (W) STEP1
0:06:13 C=W
Summary
Prev.Pg.
Alberto Romano Schiesari – www.profars.com
65
Execution
Ex.: INIT 1 = serves jobs with classes A, B and C.
The SELECTION PRIORITY is basically FIFO.
Then, JOB0001 is selected first, and JOB0002 is selected after
JOB0001
Input spool:
Job queue (jobs waiting for execution)
JOB0001 (class A)
JOB0002 (class B)
INIT 1 : serves jobs with classes A, B and C; in
the example, INIT 1 will select jobs 0001 and
0002.
JOB0003 (class R)
Selection priority: basically FIFO
JOB0004 (class D)
(First In First Out)
JOB0005 (class E)
JOB0006 (class T)
Etc...
Summary
Prev.Pg.
Alberto Romano Schiesari – www.profars.com
66
Execution
INIT 1 selected JOB0001
Input spool:
Job queue (jobs waiting for execution)
JOB0001 (class A)
INIT 1 : selected JOB0001 for execution
JOB0002 (class B)
JOB0003 (class R)
JOB0004 (class D)
JOB0005 (class E)
JOB0006 (class T)
Etc...
Summary
Prev.Pg.
Alberto Romano Schiesari – www.profars.com
67
Execution
INIT 1 pick up the information related to each step
(program execution order [EXEC] +
information about the datasets the program uses [DD] )
to do some things.
Input spool:
Job queue (jobs waiting for execution)
JOB0001 (class A)
Process each STEP
JOB0002 (class B)
JOB0003 (class R)
JOB0004 (class D)
JOB0005 (class E)
JOB0006 (class T)
Etc...
Summary
Prev.Pg.
Alberto Romano Schiesari – www.profars.com
68
Execution
1st. step :
- Identify which program must be executed (PGM=xxxxxxxx)
- Verify DISP of each DD:
-- IF DISP=OLD or DISP=SHR or DISP=MOD, verify whether the
dataset already exists, whether it is reserved / locked for another
user, etc...
- If DISP=NEW, create the dataset (does it exist? Is there enough
room? etc...)
- Ask LOADER to fetch program from the right library (is there
STEPLIB? Is there JOBLIB?)
Let everything set up so that OPEN can go smoothly... (*)
(*) unless the program uses DYNALLOC... As CICS does...
Summary
Prev.Pg.
Alberto Romano Schiesari – www.profars.com
69
Execution
Starting parenthesis...
Summary
Prev.Pg.
Alberto Romano Schiesari – www.profars.com
70
Execution
Dataset allocation:
(a) outside program, before starting the execution
(by initiator); information is provided by DD statement
(b) by the program (dinamically); in this case:
- no DD needed
- allocation is done by a service ordered to the operating
system (via macro / SVC) called DYNALLOC
(dynamic allocation)
- program must process the “no allocation possible” condition
Summary
Prev.Pg.
Alberto Romano Schiesari – www.profars.com
71
Execution
Ending parenthesis...
Summary
Prev.Pg.
Alberto Romano Schiesari – www.profars.com
72
Execution
1st. step :
Everything OK?
Then you can call the program for execution.
Order LOADER to fetch program and transfer control (remember
PSW? remember entry-point?) to the program’s 1st instruction.
In other words, (talking in assemblish...): INIT orders the
BALR 14,15 to transfer control to the program.
Summary
Prev.Pg.
Alberto Romano Schiesari – www.profars.com
73
Execution
1st. step :
Our program is executed.
What does it mean? It means that CPU executes its instructions.
But...
There are dozens of other programs that need to use the CPU time,
dreaming of CPU executing its instructions.
That’s when the dispatching priority comes.
It determines the privileges (or none) my program has in the
algorithm that determines how much time each cuncurrent
program get from CPU.
Summary
Prev.Pg.
Alberto Romano Schiesari – www.profars.com
74
Execution
1st. step :
What if a dataset is read, and the dataset is available via DD * ?
When OPEN is issued, the access method receives information
(set up by JES2) that the dataset is awaiting at the input job spool
(identified by its stepname and ddname).
Therefore our program is going to read data directly from input
spool area.
Summary
Prev.Pg.
Alberto Romano Schiesari – www.profars.com
75
Execution
1st. step :
JOB1234
1
2
3
4
5
6
//PSTARS3T
JOB
(1234),'ALBERTO',CLASS=T,MSGCLASS=O
//STEP1 EXEC ASMACLG
XXASMACLG PROC
XXC
EXEC PGM=ASMA90
XXSYSLIB
DD DSN=SYS1.MACLIB,DISP=SHR
XXSYSUT1
DD DSN=&&SYSUT1,SPACE=(4096,(120,120),,,ROUND),
XX
UNIT=SYSALLDA,DCB=BUFNO=1
7 XXSYSPRINT DD SYSOUT=*
8 XXSYSLIN
DD DSN=&&OBJ,SPACE=(3040,(40,40),,,ROUND),
XX
UNIT=SYSALLDA,DISP=(MOD,PASS),
XX
DCB=(BLKSIZE=3040,LRECL=80,RECFM=FB,BUFNO=1)
9 //C.SYSIN DD *
10 XXL
EXEC PGM=HEWL,PARM='MAP,LET,LIST',COND=(8,LT,C)
11 XXSYSLIN
DD DSN=&&OBJ,DISP=(OLD,DELETE)
12 XX
DD DDNAME=SYSIN
13 XXSYSLMOD DD
DISP=(,PASS),UNIT=SYSALLDA,SPACE=(CYL,(1,1,1)),
XX
DSN=&&GOSET(GO)
14 XXSYSUT1
DD DSN=&&SYSUT1,SPACE=(1024,(120,120),,,ROUND),
XX
UNIT=SYSALLDA,DCB=BUFNO=1
15 XXSYSPRINT DD SYSOUT=*
16 XXG
EXEC PGM=*.L.SYSLMOD,COND=((8,LT,C),(8,LT,L))
17 //G.SYSPRINT DD SYSOUT=*
18 //G.SYSOUT
DD SYSOUT=*
19 //G.AGENCIAS DD *
Step=C ; DD=SYSIN
PROGRAMA START 0
ENTRAR
BAL
R14,ROTMAIN
PROG PROPRIAMENTE DITO
SAIR
DC
A(0)
SAVEAREA DO ENDERECO VOLTA
ROTMAIN ST
R14,*-4
SALVA ENDERECO VOLTA
OPEN (AGENCIAS,INPUT)
ABRE ARQUIVO
LEITURA BAL
14,LEREG
LE REGISTRO
CLI
FLAGFIM,C'Y'
END OF FILE?
BE
ACABAR
SE SIM, TERMINAR O PROGRAMA
AP
LIDOS,=P'1'
CONTA REGISTROS LIDOS
B
LEITURA
VOLTA A LER
ACABAR
CLOSE (AGENCIAS)
FECHA ARQUIVO
L
R14,ROTMAIN-4
RESTAURA ENDERECO VOLTA
BR
R14
VOLTA
DC
A(0)
SAVEAREA DO ENDERECO DE VOLTA
LEREG
ST
R14,*-4
SALVA ENDERECO DE VOLTA
B
SAILER
VAI PARA SAIDA
FIMAG
MVI
FLAGFIM,C'Y'
MARCA QUE ARQUIVO ACABOU
SAILER
L
R14,LEREG-4
RESTAURA ENDERECO VOLTA
BR
R14
VOLTA
* DECLARACAO DE ARQUIVOS E AREAS
RELAT
DCB LRECL=133,DSORG=PS,RECFM=FA,DDNAME=SYSPRINT,MACRF=PM
AGENCIAS DCB LRECL=80,DSORG=PS,DDNAME=AGENCIAS,MACRF=GM,EODAD=FIMAG
FLAGFIM DC C'N'
FLAG INDICA FIM ARQUIVO ENTRADA
LAG
DS CL80
AREA PARA LEITURA ARQUIVO
END ,
Program
reads directly
from here
Summary
Prev.Pg.
ULTIMO STMT FONTE
Step=G ; DD=AGENCIAS
0001NOME
0002NOME
0003NOME
0004NOME
DA
DA
DA
DA
AGENCIA
AGENCIA
AGENCIA
AGENCIA
0001---------*
0002---------*
0003---------*
0004---------*
Alberto Romano Schiesari – www.profars.com
76
Execution
1st. step :
Our program finishes.
Talking in “assemblish”, on the last BR 14, control is returned to
initiator; especifically to a little-sub-component called terminator:
it verifies the end-of-execution type (normal, abnormal), Return
Code, closes the non-closed datasets, etc.
Summary
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77
Execution
2nd. step and so on:
Process is repeated for all JOB steps, including the Return Code
test (COND...), to know whether or not the step must be executed,
flushed, etc...
Summary
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78
Execution
OK?
Job input OK?
Summary
Prev.Pg.
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79
Execution
Time to start understanding output
spooling system
Summary
Prev.Pg.
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80
Result output (reports)
A bunch of people access data from the output spool.
JES2
Output spool area
Roscoe (CA software) or
TSO (IBM software)
Control
(BMC softwares)
Summary
Prev.Pg.


Alberto Romano Schiesari – www.profars.com
81
Result output (reports)
Who “writes” on the output spool?
JES2
Output spool area
Application programs
Operating System and its
components (including JES2)
Summary
Prev.Pg.
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82
Result output (reports)
Everybody “prints” something...
Application programs and operating system.
JES2
Output spool area
Application programs
Operating System and its
components (including JES2)
Summary
Prev.Pg.
Alberto Romano Schiesari – www.profars.com
83
Result output (reports)
But... In fact, only JES2 really writes.
Do you know why?
JES2
Output spool area
Application Programs
Operating System and its
components (including JES2)
Summary
Prev.Pg.
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84
Result output (reports)
Because everybody “printing” is intercepted by JES, and JES redirects
those lines to the output spool area. JES is its administrator.
This is done naturally if output is specified as SYSOUT=xxx
JES2
Output spool area
Application programs
Operating System and its
components (including JES2)
Summary
Prev.Pg.
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85
Result output (reports)
What about the operating system outputs?
They are redirected to where especified at MSGCLASS=xxx
JES2
Output spool area
Operating system and its
components (including JES2)
Summary
Prev.Pg.
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86
Result output (reports)
What about the application programs’ output?
They are redirected to where especified at SYSOUT=xxx
JES2
Output spool area
Application programs
Summary
Prev.Pg.
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87
Result output (reports)
But what is that xxx?
JES2
?
Application programs
Operating Systems and its
components (including JES2)
Summary
Prev.Pg.
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88
Result output (reports)
It is the output class.
JES2
There is n datsets
for each job,
Each one has
an associated
class
Application Programs
Opertating System and its
components (including JES2)
Summary
Prev.Pg.
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89
Result output (reports)
Unless otherwise specified at MSGLEVEL, system generates 3 reports about the
JCL processing:
JES2.JESMSGLG = job events log (start, end, etc)
JES2.JESJCL = expanded JCL
JES2.JESYSMSG = initiator / terminator messages
JOB1234 , file JES2.JESMSGLG, class R
Line 1 file 1
...
Etc...
JOB
JOB1234 , file JES2.JESJCL, class R
Line 1 Relat1
...
Etc...
JOB1234 , file JES2.JESYSMSG, class R
Line 1 Relat2
...
Etc...
Summary
Prev.Pg.
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90
Result output (reports)
JES2.JESMSGLG example ( truncated at right)
J E S 2
J O B
L O G
--
S Y S T E M
D 1 T
--
15.42.13 JOB04227 ---- FRIDAY,
28 AUG 2009 ---15.42.13 JOB04227 IRR010I USERID D839471 IS ASSIGNED TO THIS JOB.
15.42.13 JOB04227 ******* PSTARS3T *--------------------------Sepro-41*
15.42.13 JOB04227 IEF196I ******* PSTARS3T *--------------------------Se
15.42.13 JOB04227 ******* PSTARS3T * IEFUJV PROCESSING COMPLETE
*
15.42.13 JOB04227 IEF196I ******* PSTARS3T * IEFUJV PROCESSING COMPLETE
15.42.13 JOB04227 ******* PSTARS3T *--------------------------Sepro-41*
15.42.13 JOB04227 IEF196I ******* PSTARS3T *--------------------------Se
15.42.13 JOB04227 IEF677I WARNING MESSAGE(S) FOR JOB PSTARS3T ISSUED
15.42.13 JOB04227 ICH70001I D839471 LAST ACCESS AT 15:42:05 ON FRIDAY,
15.42.13 JOB04227 $HASP373 PSTARS3T STARTED - INIT 28
- CLASS T - SYS
15.42.13 JOB04227 IEF403I PSTARS3T - STARTED - TIME=15.42.13
15.42.14 JOB04227 IEF285I
SYS1.MACLIB
15.42.14 JOB04227 IEF285I
VOL SER NOS= D1T900.
15.42.14 JOB04227 --TIMINGS (M
15.42.14 JOB04227 -JOBNAME STEPNAME PROCSTEP
RC
EXCP
CPU
SRB
15.42.14 JOB04227 -PSTARS3T STEP1
C
00
63
.00
.00
15.42.14 JOB04227 -PSTARS3T STEP1
L
00
19
.00
.00
15.42.14 JOB04227 IEF285I
SYS09240.T154213.RA000.PSTARS3T.GOSET.H06
15.42.14 JOB04227 -PSTARS3T STEP1
G
00
9
.00
.00
15.42.14 JOB04227 IEF404I PSTARS3T - ENDED - TIME=15.42.14
15.42.14 JOB04227 -PSTARS3T ENDED. NAME-JAGUA #4 ALBERTO
TOTAL CPU
15.42.14 JOB04227 $HASP395 PSTARS3T ENDED
------ JES2 JOB STATISTICS -----28 AUG 2009 JOB EXECUTION DATE
116 CARDS READ
640 SYSOUT PRINT RECORDS
0 SYSOUT PUNCH RECORDS
44 SYSOUT SPOOL KBYTES
0.00 MINUTES EXECUTION TIME
Summary
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91
Result output (reports)
JES2.JESJCL example (truncatd at right)
=============================== T O P =================================
1 //PSTARS3T
JOB
(9526,,,20,,1090),'JAGUA #4 ALBERTO',
//
CLASS=T,TIME=3,MSGCLASS=O
2 //STEP1 EXEC ASMACLG,PARM.G='INFORMACOES VIA PARM'
3 XXASMACLG PROC
XX*
XX*************************************************************
XX*
ASMACLG
XX* THIS PROCEDURE RUNS THE HIGH LEVEL ASSEMBLER, LINK-EDITS TH
XX* NEWLY ASSEMBLED PROGRAM AND RUNS THE PROGRAM AFTER
XX* THE LINK-EDIT IS ACCOMPLISHED.
XX*************************************************************
XX*
4 XXC
EXEC PGM=ASMA90
5 XXSYSLIB
DD DSN=SYS1.MACLIB,DISP=SHR
6 XXSYSUT1
DD DSN=&&SYSUT1,SPACE=(4096,(120,120),,,ROUND),
XX
UNIT=SYSALLDA,DCB=BUFNO=1
7 XXSYSPRINT DD SYSOUT=*
8 XXSYSLIN
DD DSN=&&OBJ,SPACE=(3040,(40,40),,,ROUND),
XX
UNIT=SYSALLDA,DISP=(MOD,PASS),
XX
DCB=(BLKSIZE=3040,LRECL=80,RECFM=FB,BUFNO=1)
9 //C.SYSIN DD *
10 XXL
EXEC PGM=HEWL,PARM='MAP,LET,LIST',COND=(8,LT,C)
11 XXSYSLIN
DD DSN=&&OBJ,DISP=(OLD,DELETE)
12 XX
DD DDNAME=SYSIN
13 XXSYSLMOD DD DISP=(,PASS),UNIT=SYSALLDA,SPACE=(CYL,(1,1,1)),
XX
DSN=&&GOSET(GO)
14 XXSYSUT1
DD DSN=&&SYSUT1,SPACE=(1024,(120,120),,,ROUND),
XX
UNIT=SYSALLDA,DCB=BUFNO=1
15 XXSYSPRINT DD SYSOUT=*
16 XXG
EXEC PGM=*.L.SYSLMOD,COND=((8,LT,C),(8,LT,L))
17 //G.SYSPRINT DD SYSOUT=*
Summary
Prev.Pg.
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92
Result output (reports)
JES2.JESYSMSG example (truncated at right)
STMT NO. MESSAGE
2 IEFC001I PROCEDURE ASMACLG WAS EXPANDED USING SYSTEM LIBRARY JE
16 IEF686I DDNAME REFERRED TO ON DDNAME KEYWORD IN PRIOR STEP WAS
ICH70001I D839471 LAST ACCESS AT 15:42:05 ON FRIDAY, AUGUST 28, 2009
IEF236I ALLOC. FOR PSTARS3T C STEP1
IEF237I BE10 ALLOCATED TO SYSLIB
IGD101I SMS ALLOCATED TO DDNAME (SYSUT1 )
DSN (SYS09240.T154213.RA000.PSTARS3T.SYSUT1.H06 )
STORCLAS (SCVIO) MGMTCLAS (
) DATACLAS (
)
VOL SER NOS= VIO
IEF237I JES2 ALLOCATED TO SYSPRINT
IGD101I SMS ALLOCATED TO DDNAME (SYSLIN )
DSN (SYS09240.T154213.RA000.PSTARS3T.OBJ.H06
)
STORCLAS (SCVIO) MGMTCLAS (
) DATACLAS (
)
VOL SER NOS= VIO
IEF237I JES2 ALLOCATED TO SYSIN
IEF142I PSTARS3T C STEP1 - STEP WAS EXECUTED - COND CODE 0000
IEF285I
SYS1.MACLIB
KEPT
IEF285I
VOL SER NOS= D1T900.
IGD105I SYS09240.T154213.RA000.PSTARS3T.SYSUT1.H06
DELETED,
DDNAME=SY
IEF285I
D839471.PSTARS3T.JOB04227.D0000102.?
SYSOUT
IGD106I SYS09240.T154213.RA000.PSTARS3T.OBJ.H06
PASSED,
DDNAME=SY
IEF285I
D839471.PSTARS3T.JOB04227.D0000101.?
SYSIN
IEF373I STEP/C
/START 2009240.1542
IEF374I STEP/C
/STOP 2009240.1542 CPU
0MIN 00.01SEC SRB
0MIN
IEF236I ALLOC. FOR PSTARS3T L STEP1
IGD103I SMS ALLOCATED TO DDNAME SYSLIN
IEF237I DMY ALLOCATED TO
IGD101I SMS ALLOCATED TO DDNAME (SYSLMOD )
DSN (SYS09240.T154213.RA000.PSTARS3T.GOSET.H06
)
STORCLAS (SCVIO) MGMTCLAS (
) DATACLAS (
)
VOL SER NOS= VIO
Summary
Prev.Pg.
Continua na
próxima página
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93
Result output (reports)
JES2.JESYSMSG example (truncated at right)
Continuação
IGD101I SMS ALLOCATED TO DDNAME (SYSUT1 )
DSN (SYS09240.T154213.RA000.PSTARS3T.SYSUT1.H06 )
STORCLAS (SCVIO) MGMTCLAS (
) DATACLAS (
)
VOL SER NOS= VIO
IEF237I JES2 ALLOCATED TO SYSPRINT
IEF142I PSTARS3T L STEP1 - STEP WAS EXECUTED - COND CODE 0000
IGD105I SYS09240.T154213.RA000.PSTARS3T.OBJ.H06
DELETED,
DDNAME=SY
IGD106I SYS09240.T154213.RA000.PSTARS3T.GOSET.H06
PASSED,
DDNAME=SY
IGD105I SYS09240.T154213.RA000.PSTARS3T.SYSUT1.H06
DELETED,
DDNAME=SY
IEF285I
D839471.PSTARS3T.JOB04227.D0000103.?
SYSOUT
IEF373I STEP/L
/START 2009240.1542
IEF374I STEP/L
/STOP 2009240.1542 CPU
0MIN 00.00SEC SRB
0MIN
IEF236I ALLOC. FOR PSTARS3T G STEP1
IEF237I VIO ALLOCATED TO PGM=*.DD
IEF237I JES2 ALLOCATED TO SYSPRINT
IEF142I PSTARS3T G STEP1 - STEP WAS EXECUTED - COND CODE 0000
IEF285I
SYS09240.T154213.RA000.PSTARS3T.GOSET.H06
KEPT
IEF285I
D839471.PSTARS3T.JOB04227.D0000104.?
SYSOUT
IEF373I STEP/G
/START 2009240.1542
IEF374I STEP/G
/STOP 2009240.1542 CPU
0MIN 00.00SEC SRB
0MIN
IGD105I SYS09240.T154213.RA000.PSTARS3T.GOSET.H06
DELETED,
DDNAME=SY
IEF375I JOB/PSTARS3T/START 2009240.1542
IEF376I JOB/PSTARS3T/STOP 2009240.1542 CPU
0MIN 00.01SEC SRB
0MIN
Summary
Prev.Pg.
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94
Result output (reports)
Let’s see an example of an application program that writes 2 reports:
//REPORT1 DD SYSOUT=*
, //REPORT2 DD SYSOUT=B
and it has MSGCLASS=R parameter in the JOB statement
JOB1234, JES2.JESMSGLG, class R
JOB1234, JES2.JESJCL, class R
Operating System
JOB1234, JES2.JESMSGLG, class R
JOB1234 , STEP 1, DD REPORT1, class R
Line 1 Report1
Line 2 Report1
...
Etc...
Application Program
(my program)
JOB1234 , STEP1, DD REPORT2, class B
Line 1 Report2
Line 2 Report2
...
Etc...
Summary
Prev.Pg.
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95
Result output (reports)
Similarly as occur in the input process, there are system components to deal with the (real)
print demand generated by the queued datasets at output spool area.
These components are the WRITERS; they work based on SYSOUT class.
They read the spool datasets in the output spool area and “print” them at some device.
JOB1234, JES2.JESMSGLG, class R
JOB1234, JES2.JESJCL, class R
JOB1234, JES2.JESMSGLG, class R
JOB1234 , STEP 1, DD REPORT1, class R
Line 1 Report1
Line 2 Report1
...
Etc...
JOB1234 , STEP1, DD REPORT2, class B
Line 1 Report2
Line 2 Report2
...
Etc...
Summary
Prev.Pg.
Writer serves
R class
datasets

Writer serves
B class
datasets
Alberto Romano Schiesari – www.profars.com
96
Result output (reports)
Sometimes (mostly at development activities) the output is NOT to be directed to
a printer. User wants to browse it at a terminal.
That’s what happen when we access sysouts Roscoe, TSO or CONTROL-V.
JOB1234, JES2.JESMSGLG, class R
JOB1234, JES2.JESJCL, class R
JOB1234, JES2.JESMSGLG, class R
JOB1234 , STEP 1, DD REPORT1, class R
Line 1 Report1
Line 2 Report1
...
Etc...
JOB1234 , STEP1, DD REPORT2, class B
Line 1 Report2
Line 2 Report2
...
Etc...
Summary
Prev.Pg.
Writer serves
R class
datasets

Writer serves
B class
datasets
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97
JCL
It’s JCL time
Summary
Prev.Pg.
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98
JCL
JCL = Job Control Language = language
to ask operating system to execute
services/tasks
Summary
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99
JCL
All languages must have its commands.
In JCL, there are 3 main commands:
JOB, EXEC and DD
Before starting with the details, let’s see
some basics
Summary
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100
JCL – Basic sintax
Basic syntax
Summary
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101
JCL – Basic sintax
// at positions 1-2
Comments: //* at positions 1-3
Always:
Summary
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102
JCL – Basic sintax
Continuation statements
· statement to be continued : last character must be a comma, to
indicate there are more parameter(s)
· following statement : // at columns 1-2, as usual, and continuation
begins at any position from 4 through 16 (position 3 must be
blank)
Summary
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103
JCL – Basic sintax
Continuation statements
Example (first 2 lines are “rulers” to use as a reference to the
statement positions) :
.
1
2
3
4
5
6
7..
123456789012345678901234567890123456789012345678901234567890123456789012
//ENTRADA
DD
DSN=SYS5.LINKLIB,
// DISP=SHR
BIBLIOTECA DE UTILITARIOS HOME MADE
//ENTRADA
DD
DSN=SYS5.LINKLIB,
//
DISP=SHR
COMENTARIO
//ENTRADA
DD
DSN=SYS5.LINKLIB,
//
DISP=SHR COMENTARIO
//ENTRADA
DD
DSN=SYS5.LINKLIB,
//
DISP=SHR
Summary
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104
JCL – Basic sintax
Continuation statements
Most common problems
.
1
2
3
4
5
6
7..
123456789012345678901234567890123456789012345678901234567890123456789012
//ENTRADA
DD
// DISP=SHR
DSN=SYS5.LINKLIB
BIBLIOTECA DE UTILITARIOS HOME MADE
Here there is no comma after; therefore DISP=SHR wasn’t considered as part of
DD statement, but a separated statement; note that bo JCL error is detected at
//ENTRADA DD; system understands that dataset SYS5.LINKLIB must be
created (there is no DISP parameter) and that following statement is wrong
(DISP=SHR is na invalid operation).
Summary
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105
JCL – Basic sintax
Continuation statements
Most common problems
.
1
2
3
4
5
6
7..
123456789012345678901234567890123456789012345678901234567890123456789012
//ENTRADA
//
DD
DISP=SHR
DSN=SYS5.LINKLIB,
COMENTARIO
Continuation begins at position 17; it’s wrong (maximum allowed for the
beginning is position 16)
Summary
Prev.Pg.
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106
JCL – Basic sintax
Continuation statements
Most common problems
.
1
2
3
4
5
6
7..
123456789012345678901234567890123456789012345678901234567890123456789012
//ENTRADA
DD
//DISP=SHR COMENTARIO
DSN=SYS5.LINKLIB,
Continuation at position 3 (wrong: minimum is position 4)
Summary
Prev.Pg.
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107
JCL – Basic sintax
Continuation statements
Most common problems
.
1
2
3
4
5
6
7..
123456789012345678901234567890123456789012345678901234567890123456789012
//ENTRADA
DD
DISP=SHR
DSN=SYS5.LINKLIB,
“Continuation” statement (second statement) hasn’t // at positions 1-2: system
understands that //ENTRADA DD DSN=SYS5.LINKLIB, will be resumed at
the next line (its last character is a comma – it indicates there will be a
continuation), but the next line is not a JCL line (it is recognized as the first – and
only - data record of a dataset named SYSIN)
Summary
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108
JCL – Basic sintax
Summary – statement syntax
q
q
Identification = // columns 1-2
Name = 1 to 8 positions, starting at posiition 3;
it must have at least one blank after the name (and before the operation)
q
Operation =
JOB or EXEC or DD (or PROC or PEND or IF or END-IF or other);
it must have at least one blank after operation name
q
Parameter(s); it/they may be of two types:
 posicional : depend on the position (sequence of specification) or

keyword : followed by “=“ sign
v
If there is only positional parameter(s), they must be specified in the correct
sequence
v
If there is only keyword parameter(s), they may be specified in any
sequence
v If there is both positional and keyword operands, the positional (in the
correct sequence) must be specified before the keyword ones (in any sequence)
q
Comments; it must have at least one blank after the operand(s)
specification, before comments
Summary
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109
O JOB as a whole - overwiew
JOB as a whole – overview
Summary
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110
O JOB as a whole - overwiew
Overview
Summary
Prev.Pg.
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111
JOB – Overview
Job start delimiter
JOB
EXEC (for the 1st step)
DD
1
(for the 1st step)
.
1st Step
.
DD
n
(for the 1st step)
EXEC (for the 2nd step)
JOB
DD
1
(for the 2nd step)
.
2nd Step
.
DD
n
(for the 2nd step)
EXEC (for the 3rd step)
DD
1
(for the 3rd step)
.
3rd Step
.
DD
n
(for the 3rd step)
The job end delimiter is the next job begin
(in the old times, it was mandatory a statement just with // in positions 1-2 and remaining spaces)
Summary
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112
JOB – Overview
For the steps:
Remember that DDs are opcional.
If a program does not use datasets, no DD’s are needed
or
If a program uses dynamic allocation for a dataset, no DD
is needed to that dataset
BUT : EXEC is mandatory; EXEC defines a step.
Summary
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113
JOB – Overview
If, for instance, the 2nd step “EXEC” has na operation code error,
it isn’t identified as a EXEC and therefore it does not identify
another new step delimiter, and therefore its DD’s are considered
as belonging to the 1st step DD’s.
//ABCARS01 JOB ...
//STEP1 EXEC PGM=PGM01
//DDA1 DD
...
//DDB1 DD
...
//DDC1 DD
...
//STEP2 ESEC PGM=PGM02
//DDA2 DD
...
//DDB2 DD
...
//DDC2 DD
...
//STEP3 EXEC PGM=PGM03
//DDA3 DD
...
//DDB3 DD
...
//DDC3 DD
...
As 2nd “EXEC” is in
error, it doesn’t delimits
the 2nd step beginning.
All blue statements are
the 1st step statements
The green ones are the
2nd step statements
Summary
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114
JOB – Overview
Example of a batch JOB with a SELECT from a DB2 database, and the
corresponding output produced.
//ARSARS01 JOB (1234),’ALBERTO’,MSGCLASS=X,CLASS=R
//STEP001 EXEC PGM=IKJEFT01,DYNAMNBR=20,REGION=6M
//STEPLIB DD DSN=SYS1.DSNDB1D.SDSNLOAD,DISP=SHR
//
DD DSN=SYS1.DSNDB1D.RUNLIB.LOAD,DISP=SHR
//DBRMLIB DD DSN=SYS1.DSNDB1D.DBRMLIB.DATA,DISP=SHR
//SYSTSPRT DD SYSOUT=*
//SYSPRINT DD SYSOUT=*
//SYSUDUMP DD SYSOUT=*
//SYSTSIN DD *
PAGE
1
DSN SYSTEM(DB1D)
***INPUT
STATEMENT:
RUN PROGRAM(DSNTEP2) PLAN(DSNTEP2) SELECT CD_AGE, NM_AGE
LIB('SYS1.DSNDB1D.RUNLIB.LOAD') –
FROM DB2T.ZZZ100_CADAGE
PARMS('/ALIGN(MID)')
WHERE CD_AGE > 20 AND CD_AGE < 100;
END
//SYSIN
DD *
+----------------------------------+
SELECT CD_AGE, NM_AGE
|
CD_AGE
|
NM_AGE
|
FROM DB2T.ZZZ100_CADAGE
+----------------------------------+
WHERE CD_AGE > 20 AND CD_AGE < 100;
1_|
30 | BARUERI
|
2_|
40 | S.JOSE R.PRETO |
3_|
50 | SAO CARLOS
|
4_|
60 | PINHEIROS
|
5_|
70 | PERDIZES
|
6_|
80 | MARAMBAIA
|
7_|
90 | JAGUARETE
|
+----------------------------------+
Summary
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JOB – Commands
Commands
Summary
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JCL - Comandos
There are 3 main JCL commands:
JOB, EXEC and DD
Let’s see them.
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JOB
JOB
Summary
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JOB
Sintax :
//jobname JOB positional_parameters,keyword_parameters
Summary
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JOB
Example :
//PDR001P2 JOB (B281),ALBERTO,MSGCLASS=X,CLASS=R
2 positional parameters
Summary
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2 keyword parameters
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JOB
Positional parameters
Generally they have information about job submitter and
accounting.
The sequence is mandatory, and the installation’ standards
must be followed.
//PDR001P2 JOB (B281),ALBERTO,MSGCLASS=X,CLASS=R
2 positional parameters
Summary
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2 keyword parameters
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JOB
Keyword parameters
Information about the job, given by means of keywords;
therefore, they can be specified at any sequence.
//PDR001P2 JOB (B281),ALBERTO,MSGCLASS=X,CLASS=R
2 positional parameters
Summary
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2 keyword parameters
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122
JOB
Keyword parameters
CLASS=
Specify the job execution class.
Each class is served by 1 (or more) initiator.
The amount of initiators and the classes each one
serves is determined by support and production
people.
Summary
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JOB
Keyword parameters
TIME=
Summary
indicates the maximum amount of CPU usage
allowed for the JOB;
1440 = specifies that there’s no CPU limit
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JOB
Keyword parameters
MSGCLASS=
Summary
Specifies the sysout class for the messages related
to the JOB
(as specified in MSGLEVEL)
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JOB
Keyword parameters
MSGVEVEL=
Summary
Specifies what has to be printed.
Syntax: MSGLEVEL=(a,b) where
a : JCL messages
0 = only JOB statement
1 = everything must be printed:
submitted JCL statements +
generated JCL statements
2 = only submitted JCL statements
b : allocation messages
0 = do not print
1 = print
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JOB
Keyword parameters
NOTIFY=
Specifies TSO userid to be notified at the job termination
REGION=
Specifies the size of the region to be allocated to the JOB
RESTART=
Specifies the stepname for the JOB to be restarted
TYPRUN=
Specifies the type of submission.
SCAN = submit, validate JCL, but do not execute the job (it is
finished after interpreter validation process; no INIT services done)
HOLD = the JOB remains in wait state, until selected for execution
by an initiator
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EXEC
EXEC
Summary
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EXEC
Sintax :
//stepname EXEC positional_parameter,keyword_parameters
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EXEC
Example :
//VERIFY EXEC P756,COND=EVEN,PARM.S1=‘T=YES’
1 positional parameter
Summary
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2 parameters keyword
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130
EXEC
Positional parameter
only 1: procname
It is a name, specifying the name of the PROC to be
executed.
If specified, keyword parameters PROC= and PGM=
cannot be used.
//STPR1 EXEC PD001
1 parâmetro posicional
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131
EXEC
Keyword parameters
Information related to the step, specified via keywords; they
can be specified in any sequence.
//ST01 EXEC PGM=LISTABND,COND=ONLY
2 keyword parameters
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132
EXEC
COND=
Specifies the execution conditions the step must be executed or flushed. COND=EVEN
step is executed even if any previous step is cancelled
COND=ONLY step is executed only if any previous step cancelled
COND=(n,cond) step is NOT EXECUTED if n satisfies the specified
condition, in any previous step
COND=(n,cond,step) step is NOT EXECUTED if n satisfies the condition
specified in the step with the specified name
Cond may be specified as : LT or GT or EQ or NE
Examples.:
COND=(4,LT)
if 4 is less than the return code of any previous step, STEP IS NOT EXECUTED
in other words:
if any previous step emitted a return code greater than 4, STEP IS NOT EXECUTED
COND=((4,LT,COMP),(4,LT,LKED))
(if 4 is less than the return code emitted by step COMP AND
if 4 is less than the return code emitted by step LKED)
THEN STEP IS NOT EXECUTED
in other words:
(if step COMP had a return code > 4
OR
if step LKED had a return code > 4)
THEN STEP IS NOT EXECUTED
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EXEC
PARM=
Summary
Data to be passed as parameters (arguments) to the called
program.
Ex.:
PARM='NOSEQ,QUOTE,OFFSET,LIB'
PARM='JAN/2003'
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EXEC
PGM=
Specifies the name of the program to be executed
PROC=
Specifies the name of the proc(edure) to be executed.
If no PGM= nor PROC= specified, then PROC= is assumed
Examples :
//STEP1 EXEC TST01
//STEP2 EXEC PROC=TST01
//STEP1 EXEC PGM=TST01
Summary
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executes PROC named TST01
executes PROC named TST01
executes program named TST01
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DD
DD (Data Definition)
Summary
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DD
Sintax :
//filename DD positional_parameters,keyword_parameters
Summary
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DD
Example :
//INFILE DD *,DCB=(LRECL=80)
1 positional parameter
Summary
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1 keyword parameter
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DD
Positional parameters
There are 3, and they are mutually
exclusives.
Only 1 positional parameter is allowed.
//FIL1
//FIL2
//FIL3
DD
DD
DD
*
DATA
DUMMY
1 positional parameter
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DD
Positional parameters: DD
*
Specifies that the record(s) from the following one are one
(in-stream) dataset. The last record is the record before the
next with // in positions 1-2.
//FILE1
DD
*
DATA RECORD 1
DATA RECORD 2
Arquivo in-stream com ddname ARQ1
DATA RECORD 3
//FILE2
DD
Summary
DSN=WFILE.TESTX,DISP=SHR
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DD
Positional parameters: DD
*
Examples:
//FILE1
DD
*
DATA RECORD 1
In-stream dataset (ddname = FILE1)
DATA RECORD 2
DATA RECORD 3
//FILE2
DD
*
DATA RECORD 1
In-stream dataset (ddname = FILE2)
DATA RECORD 2
DATA RECORD 3
//FILE3
DD
DATA RECORD 1
DATA RECORD 2
*
In-stream dataset (ddname = FILE3)
DATA RECORD 3
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DD
Positional parameters: DD
*
Examples:
//* FOLLOWING DATASET = TODAY’S TRANSACTIONS
//FILE4
DD
*
DATA RECORD 1
In-stream dataset (ddname FILE4)
DATA RECORD 2
DATA RECORD 3
//* FOLLOWIN DATASET = CONTROL DATA
//FILE5
DD
JUL/2009
Summary
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*
In-stream dataset (ddname FILE5)
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DD
Positional parameters: DD
*
Examples:
//FILE4
DD
*
//* FOLLOWING DATASET = TODAY’S TRANSACTIONS
DATA RECORD 1
DATA RECORD 2
DATA RECORD 3
//FILE5
DD
*
//* FOLLOWING DATSET = CONTROL DATA
JUL/2009
Summary
Prev.Pg.
For Operating System is OK,
but...
It’s WRONG!
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DD
Positional parameters: DD
*
Examples:
//FILE4
DD
*
//* FOLLOWING DATASET = TODAY’s TRANSACTIONS
DATA RECORD 1
DATA RECORD 2
DATA RECORD 3
//FILE5
DD
*
//* FOLLOWING DATASET = CONTROL DATA
WHY ?
JUL/2009
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144
DD
Positional parameters: DD
Examples:
In-stream data
starting here
//FILE4
DD
*
This statement (it has //) is understood by the system
as end of FILE4 in-stream file (zero records); it is a
“normal” JCL statement, a comment
*
//* FOLLOWING DATASET = TRANSACTION FILE
First line is identified as a non-JCL statement
(it doesn’t have // at position 1-2); it is meant to
be the first record of an in-stream file, whose
ddname is assumed to be SYSIN
DATA RECORD 1
DATA RECORD 2
Another in-stream
data file starting
here
DATA RECORD 3
//FILE5
DD
*
//* FOLLOWING DATASET = CONTROL FILE
JUL/2009
Summary
This statement (it has //) is understood
by the system as end of FILE5 in-stream
file (zero records); it is a “normal” JCL
statement, a comment
This record is identified as a non-JCL statement (it doesn’t have // at position 1-2); it is
meant to be the first record of an in-stream file, whose ddname is assumed to be SYSIN
(it overrides the previous SYSIN dataset)
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DD
Positional parameters: DD
*
THEN:
This
//FILE4
DD
*
//* FOLLOWING DATASET = TODAY’S TRANSACTIONS
DATA RECORD 1
DATA RECORD 2
DATA RECORD 3
//FILE5
DD *
//* FOLLOWING DATASET = CONTROL DATA
JUL/2009
the system understands this way:
FILE4
FILE5
SYSIN
= (dataset with zero records)
= (dataset with zero records)
= dataset with 1 record (JUL/2009)
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DD
Positional parameters: DD
DATA
Similar to DD *.
Specifies that the statements that follow the DD DATA
statement are an in-stream dataset.
Last record of this dataset is the one contents is equal to the delimiter
declared in the DLM keyword parameter.
//FILE1
DD
DATA,DLM=‘EOF*’
DATA RECORD 1
DATA RECORD 2
In-stream records for ARQ1 ddname dataset
DATA RECORD 3
// THIS ISN’T A JCL STATEMENT !
EOF*
//FILE2
DD
Summary
DSN=FILEWORK.TESTX,DISP=SHR
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DD
Positional parameters: DD
DUMMY
Just for input files; specifies that the dataset does not exist (phisically – only
logically).
System pretends to the access method (when dataset is opened, read, or closed)
that the dataset exists, but has no records (empty dataset).
In other words: it is correctly opened, with no problems, at the 1st read the end-offile condition is triggered, it is correctly closed.
It is a good alternative when program opens, reads and closes the dataset, even if
dataset does not exist (the data won’t be used). Example: a program that reads 2
files: FILEA with transactions from the current month, and FILEB with transaction
from past months of the year. In january (there is no past months in the year),
FILEB can be a DD DUMMY file.
//FILEB
DD
DUMMY
//FILEA
DD
DSN=CURMONFI.TESTEX,DISP=SHR
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DD
Keyword Parameters
Information related to the step, specified by keywords; so,
they can be specified in any sequence.
//ST01 EXEC PGM=LISTABND,COND=ONLY
2 keyword parameters
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DD
DSN
Data Set Name = specifies the dataset
external name, the dataset name for the
operating system (its name for the program
is the ddname)
Ex.:
//F1 DD DSN=ALB.WRK.FIL,DISP=SHR
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DD
DCB
Summary
Specifies the characteristics of the dataset. Some sub-parameters are:
DSORG= (Data Set ORGanization) specifies the dataset organization.
Main options:
PO (Partitioned Organization = Partitioned Data Set = PDS)
PS (Physical Sequential = Sequencial)
EXPDT= (EXPiration DaTe) = specifies the date the datset may be deleted
RETPD= (RETention PerioD) specifies the period in which the dataset,
although expired, cannot be deleted
LRECL= (Logical RECord Length) specifies the length, in bytes, og the
logical record
RECFM= (RECord ForMat) specifies the dataset records’ format.
Main options :
FB = Fixed Blocked
F = Fixed (Unblocked)
FBA = Fixed Blocked Asa
FA = Fixed (Unblocked) Asa
V = Variable (Unblocked)
VB = Variable blocked
U = Undefined
BLKSIZE= (BLocKSIZE) specifies the length, in bytes, of the physical
record (block)
Ex.:
//SYSIN DD DUMMY,DCB=(LRECL=80,RECFM=FB,BLKSIZE=800)
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DD
LRECL
Specifies the logical record length
RECFM
Specifies the logical record format: F (fixed), FB (fixed
blocked), V (variable), VB (variable blocked)
BLKSIZE Specifies the length of the physical records (blocks)
DSORG
EXPDT
RETPD
Summary
Specifies the dataset organization: OS (physical sequential),
PO (partitioned organization)
Specifies the dataset expiration date
Specifies the dataset retention period (in which it is not
expired)
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DD
DISP
Disposition
DISP=(a,b,c)
specifies the action to be done with the dataset
a = NEW (dataset must be created) or
OLD (dataset is already exists; exclusive use) or
SHR (shared – dataset already exists; shared use) or
MOD (modify – dataset already exists; it will be extended)
b = CATLG (dataset will be cataloged at the normal end of the
program, if the program terminates normally) or
UNCATLG (dataset will be uncataloged at the normal end of the
program, if the program terminates normally) or
DELETE (dataset will be deleted at the normal end of the
program, if the program terminates normally)
KEEP (dataset will be kept at the normal end of the program, if
the program terminates normally)
PASS (temporary dataset; it will be passed to the further steps)
c = CATLG (dataset will be cataloged at the abnormal end of the
program, if the program terminates abnormally) or
UNCATLG (dataset will be uncataloged at the abnormal end of
the program, if program terminates abnormally) or
DELETE (dataset will be deleted at the abnormal end of the
program, if the program terminates abnormally)
KEEP (dataset will be kept at the abnormal end of the program,
if the program terminates abnormally)
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DD
UNIT
Specifies where the dataset must be allocated.
Generally (in development environments) : SYSDA or 3390
SYSOUT
SYSOUT=class
SYSOUT=(class,,formsname)
SYSOUT=(class,writername,formsname)
SYSOUT=(class,writername)
SYSOUT=(class,INTRDR)
Ex.:
//SYSOUT DD SYSOUT=*
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DD
SPACE
Summary
SPACE= (a,(b,c),RLSE) or
SPACE= (d,(b,c),RLSE)
Specifies the amount of disk space to be allocated to the datase.
a = TRK or CYL or ABSTR allocation unit : tracks,
cylinders, or logical record length
b = primary area amount
c = secondary area amount (optional)
d = logical record length
RLSE = (ReLeaSE) (optional) specifies that if there is space
left in the primary area after closing the file, this space must
be released
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DD
KEYOFF=
KEY OFFset = specifies the key offset in the logical record (for
VSAM KSDS datasets)
KEYLEN=
KEY LENgth = specifies the key length (for VSAM KSDS
datsets)
RECORG=
RECord ORGanization = specifies the VSAM type:
KS (KSDS), ES (ESDS), RR (RRDS) or LS (Linear Space)
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DD
Examples :
//OUTFIL
//
//
DD
DSN=ATAAABPS.EPC.SE62,
DISP=(NEW,CATLG,DELETE),SPACE=(TRK,(100,50)),
UNIT=SYSDA,DCB=LRECL=83
//INFIL
DD
DSN=ATAAABPS.EPC.SLB005,DISP=SHR
//EPCASLBS DD
//
//
//
//
DSN=ATAAABPS.EPC.SE64(+1),
DISP=(NEW,CATLG,DELETE),
SPACE=(TRK,(100,50)),
UNIT=SYSDA,
DCB=LRECL=83
//EPCASLBS DD
//
//
//
//
DSN=ATAAABPS.EPC.SE64(+1),
DISP=(NEW,CATLG,DELETE),
SPACE=(TRK,(100,50)),
UNIT=SYSDA,
DCB=(LRECL=83,BLKSIZE=830)
//VKSDS1 DD DSN=DSVAABVS.LSG.A889.ALBERTO,DISP=(,CATLG,DELETE),
//
SPACE=(CYL,(10,10)),LRECL=100,KEYOFF=10,
//
KEYLEN=12,RECORG=KS
Summary
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Library search
Library search
Summary
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Busca em bibliotecas
There are in the system lists of libraries that must be searched
when a member must be found.
Some of these lists refer to:
 Executable programs
JCL
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Load module search
 Executable programs (load modules) search
Operating system libraries
SYS1.LINKLIB
User libraries
Ex.: SYS9.LINKLIB
SYS9.EMPLK01
SYS8.USRRHLIB
SYS7.EASYLIB
etc
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Load module search
 Load module search
Normally the operating system libraries are automatically
searched
SYS1.LINKLIB etc
The user libraries are searched if:
- They are in the automatic search list
- They are specified in the JOBLIB or STEPLIB statements
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Load module search
 Load module search
JOBLIB / STEPLIB
These are special DDs that specify that na automatic search
must be made in the libraries they refer.
JOBLIB must be specified at the beginning of the JOB, and is
by all EXECs of the job
STEPLIB must be specified just after the EXEC statement,
and the search in the library it refers to is made just for the
step
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Load module search
 Load module search
JOBLIB example
//JOBEXEMP JOB (1234),’ALBERTO’,CLASS=A
//JOBLIB DD
DSN=SYS9.MYLIB,DISP=SHR
//STEPX1 EXEC PGM=PGTST01
//ENTRADA DD DSN=ARQUIVOX,DISP=SHR
//SAIDA
DD SYSOUT=A
//STEPX2 EXEC PGM=PGTST02
//DD1
DD DSN=ARQUIVOX,DISP=SHR
//SYSOUT DD SYSOUT=A
//STEPX3 EXEC PGM=PGTST03
//SYSIN
DD DSN=ARQUIVOX,DISP=SHR
//RELAT
DD SYSOUT=A
Summary
Prev.Pg.
- Programs PGTST01,
PGTST02 and PGTST03 are
searched at SYS9.MYLIB
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Load module search
 Load module search
STEPLIB example
//JOBEXEMP JOB (1234),’ALBERTO’,CLASS=A
//STEPX1 EXEC PGM=PGTST01
//STEPLIB DD DSN=SYS8.MYLIBX,DISP=SHR
//ENTRADA DD DSN=ARQUIVOX,DISP=SHR
//SAIDA
DD SYSOUT=A
//STEPX2 EXEC PGM=PGTST02
//STEPLIB DD DSN=SYS8.MYLIBY,DISP=SHR
//DD1
DD DSN=ARQUIVOX,DISP=SHR
//SYSOUT DD SYSOUT=A
//STEPX3 EXEC PGM=PGTST03
//STEPLIB DD DSN=SYS8.MYLIBZ,DISP=SHR
//SYSIN
DD DSN=ARQUIVOX,DISP=SHR
//RELAT
DD SYSOUT=A
Summary
Prev.Pg.
- Program PGTST01 is searched
at SYS8.MYLIBX
- Program PGTST02 is serached
at SYS8.MYLIBY
- Program PGTST03 is searched
at SYS8.MYLIBZ
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JCL search
 JCL search
Operating system libraries
SYS1.PROCLIB
User libraries
Ex.: SYS9.PROCLIB
SYS9.EMPROC1
SYS8.USRPROCL
SYS7.PRODPROC
etc
Summary
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JCL search
 JCL search
Normally the operating system libraries are automatically
searched
SYS1.PROCLIB
The user libraries are searched if:
- They are in the automatic search
- They are specified in the JCLLIB statement
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JCL search
 JCL search (procedures – PROCS)
JCLLIB / INCLUDE
It is a special DD that specifies that it must have search in the
specified libraries.
JCLLIB must be specified in the beginning of the JOB.
To insert the JCL statements from a library (specified in the
JCLLIB) member into the stream of JCL statement being built
(by the reader / interpreter) use INCLUDE statement.
See following example:
Summary
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JCL search
JCL search (procedures)
JCLLIB / INCLUDE: example
//LSG#@ARS JOB ('ALBERTO'),'ALBERTO',CLASS=1,MSGCLASS=X
//
JCLLIB ORDER=(JCL.SIST.SRC)
//
INCLUDE MEMBER=BIBPROD
//*------------------------------------//STEP1
EXEC PGM=P001
//STEP2
EXEC PGM=P003
//STEP3
EXEC PGM=P004
If BIBPROD member of JCL.SIST.SRC dataset has the statement
//STEPAUX EXEC PGM=SHOWTIME
the submetted JCL is:
//LSG#@ARS JOB ('ALBERTO'),'ALBERTO',CLASS=1,MSGCLASS=X
//*
JCLLIB ORDER=(JCL.SIST.SRC)
//STEPAUX EXEC PGM=SHOWTIME
//*------------------------------------//STEP1
EXEC PGM=P001
//STEP2
EXEC PGM=P003
//STEP3
EXEC PGM=P004
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JCL search
JCL search (procedures)
JCLLIB / INCLUDE: another example
//LSG#@ARS JOB ('ALBERTO'),'ALBERTO',CLASS=1,MSGCLASS=X
//
JCLLIB ORDER=(JCL.SIST.SRC)
//
INCLUDE MEMBER=BIBDESEN
//*------------------------------------//STEP1
EXEC PGM=P001
//STEP2
EXEC PGM=P003
//STEP3
EXEC PGM=P004
If BIBDESEN member of JCL.SIST.SRC dataset has the statement
//STEPAUX EXEC PGM=IEFBR14
the submitted JCL is:
//LSG#@ARS JOB ('ALBERTO'),'ALBERTO',CLASS=1,MSGCLASS=X
//*
JCLLIB ORDER=(JCL.SIST.SRC)
//STEPAUX EXEC PGM=IEFBR14
//*------------------------------------//STEP1
EXEC PGM=P001
//STEP2
EXEC PGM=P003
//STEP3
EXEC PGM=P004
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PROCS
PROCS
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PROCS
Procs = procedures = set of non-JOB
and non-data statements.
There are 2 types:
q
CATALOGED
q
IN-STREAM
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PROCS
q
Summary
CATALOGED procedures
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PROCS
Cataloged procedures are those:
- prepared
- cataloged (as a member) in a PROCLIB
so that they can be called for execution in
the jobs
- They cannot have JOB statement
- Start with PROC statement
- End with PEND statement
- They cannot have in-stream data (but they can be inserted
via override)
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PROCS
Preparing the proc:
- Edit with Roscoe / TSO and save it. Ex.
//PROCDEMO PROC
//STEPX1 EXEC PGM=PGTST01
//INFILE DD DSN=XFILE,DISP=SHR
//OUFILE DD SYSOUT=A
//STEPX1 EXEC PGM=PGTST01
//INFILE DD DSN=XFILE,DISP=SHR
//OUFILE DD SYSOUT=A
//STEPX1 EXEC PGM=PGTST01
//INFILE DD DSN=XFILE,DISP=SHR
//OUFILE DD SYSOUT=A
//
PEND
- It is an “almost normal” JCL!
- No JOB statement is allowed
- Begins with PROC statement
- Ends with PEND statement
- No in-stream data allowed
This proc has 3 steps
(STEPX1, STEPX2 & STEPX3)
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PROCS
Cataloging the proc:
- Copy to a proclib. Ex.
//CATAL
//SAIDA
//ENTRA
EXEC PGM=IEBCOPY
DD
DSN=SYS9.PROCLIB(PROCDEMO)
DD
DATA,DLM=‘FINAL’
//PROCDEMO PROC
//STEPX1 EXEC PGM=PGTST01
//INFILE DD DSN=XFILE,DISP=SHR
//OUFILE DD SYSOUT=A
//STEPX1 EXEC PGM=PGTST01
//INFILE DD DSN=XFILE,DISP=SHR
//OUFILE DD SYSOUT=A
//STEPX1 EXEC PGM=PGTST01
//INFILE DD DSN=XFILE,DISP=SHR
//OUFILE DD SYSOUT=A
//
PEND
- Simple copy to a proclib
member
FINAL
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PROCS
Executing the proc:
- Calling for execution. Ex.
//ARSARS01
JOB (1234),’ALBERTO’,CLASS=T,MSGCLASS=R
//S1
EXEC PROC=PROCDEMO
1ST CALL
//S2
EXEC PROCDEMO
2ND CALL
//STEPX1.INFILE DD
*
in-stream data (INFILE dataset, STEPX1 step, proc PROCDEMO)
//S3
EXEC PROCDEMO
3RD CALL
- Reader / interpreter finds
PROCDEMO in a proclib to
know how to expand it
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PROCS
q
Summary
IN-STREAM procs
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PROCS
They are
- declared at the beginning of the JOB
- called for execution in the same JOB
- JOB statement is not allowed
- Must begin with a PROC statement
- Must end with a PEND statement
- In-stream data are not allowed
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PROCS
Declaring the Proc
- Declared at the beginning of the JOB. Ex.
//ARSARS01
JOB (1234),’ALBERTO’,CLASS=T,MSGCLASS=R
//PROCDEMO PROC
//STEPX1 EXEC PGM=PGTST01
//INFILE DD DSN=XFILE,DISP=SHR
//OUFILE DD SYSOUT=A
- PROC declared at the
//STEPX1 EXEC PGM=PGTST01
//INFILE DD DSN=XFILE,DISP=SHR
beginning of the JOB
//OUFILE DD SYSOUT=A
//STEPX1 EXEC PGM=PGTST01
//INFILE DD DSN=XFILE,DISP=SHR
//OUFILE DD SYSOUT=A
//
PEND
//S1
EXEC PROC=PROCDEMO
//* 1ST CALL
//S2
EXEC PROCDEMO
//* 2ND CALL
//STEPX1.INFILE DD
*
in-stream data (INFILE dataset, STEPX1 step, proc PROCDEMO)
//S3
EXEC PROCDEMO
//* 3RD CALL
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PROCS
Calling the proc
- Called for execution at the same job. Ex.
//ARSARS01
JOB (1234),’ALBERTO’,CLASS=T,MSGCLASS=R
//PROCDEMO PROC
//STEPX1 EXEC PGM=PGTST01
//INFILE DD DSN=XFILE,DISP=SHR
- Reader / Interpreter DOES
//OUFILE DD SYSOUT=A
NOT GO to any PROCLIB in
//STEPX1 EXEC PGM=PGTST01
order to expand the PROC;
//INFILE DD DSN=XFILE,DISP=SHR
//OUFILE DD SYSOUT=A
- Expansion is done “inquiring”
//STEPX1 EXEC PGM=PGTST01
//INFILE DD DSN=XFILE,DISP=SHR
the PROC-PEND block at the
//OUFILE DD SYSOUT=A
same job where it is referred to
//
PEND
//S1
EXEC PROC=PROCDEMO
//* 1ST CALL
//S2
EXEC PROCDEMO
//* 2ND CALL
- PROC is called in the same job
//STEPX1.ENTRADA DD
*
in-stream data (INFILE dataset,
where it is declared
STEPX1 step, proc PROCDEMO)
//S3
EXEC PROCDEMO
//* 3RD CALL
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PROCs – symbolic parameters
Symbolic parameters
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PROCs – symbolic parameters
In the following PROC :
//SSSPRO1
//STEPA
//DD1
//REPORT1
//STEPB
//REPORT2
//STEPC
//REPORT3
//
PROC
EXEC
DD
DD
EXEC
DD
EXEC
DD
PEND
PGM=PPPX1
DSN=ARQALB.DATA.DISP=SHR
SYSOUT=A
PGM=PPPX2
SYSOUT=A
PGM=PPPX3
SYSOUT=A
Everytime it is called, reports with ddname REPORT, REPORT2 &
REPORT3 are class A output.
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PROCs – symbolic parameters
To provide flexibility, one may leave the class able to be modified when
PROC is invoked. This is possible via symbolic parameters:
//SSSPRO1
//STEPA
//DD1
//REPORT1
//STEPB
//REPORT2
//STEPC
//REPORT3
//
PROC
EXEC
DD
DD
EXEC
DD
EXEC
DD
PEND
PGM=PPPX1
DSN=ARQALB.DATA.DISP=SHR
SYSOUT=&REPCLA
PGM=PPPX2
SYSOUT=&REPCLA
PGM=PPPX3
SYSOUT=&REPCLA
This way the class is NOT specified.
- CLASS must have a default value or
- CLASS must be specified when PROC is invoked (if not specified, default
value is assumed)
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PROCs – symbolic parameters
If there isn’t default value: JCL error.
When this in-stream PROC is expanded
//JOBEXEMP JOB (1234),’ALBERTO’,CLASS=B
//SSSPRO1 PROC
//STEPA
EXEC PGM=PPPX1
//DD1
DD
DSN=ARQALB.DATA.DISP=SHR
//REPORT1 DD
SYSOUT=&REPCLA
//STEPB
EXEC PGM=PPPX2
//REPORT2 DD
SYSOUT=&REPCLA
//STEPC
EXEC PGM=PPPX3
//REPORT3 DD
SYSOUT=&REPCLA
//
PEND
//*
//S1
EXEC SSSPR01
the system won’t know what class must me associated to reports DD’s
REPORT1, REPORT2 & REPORT3 in STEP S1.
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PROCs – symbolic parameters
One alternative to specify the default value is via PROC statement.
//JOBEXEMP JOB (1234),’ALBERTO’,CLASS=B
//SSSPRO1 PROC REPCLA=*
//STEPA
EXEC PGM=PPPX1
//DD1
DD
DSN=ARQALB.DATA.DISP=SHR
//REPORT1 DD
SYSOUT=&REPCLA
//STEPB
EXEC PGM=PPPX2
//REPORT2 DD
SYSOUT=&REPCLA
//STEPC
EXEC PGM=PPPX3
//REPORT3 DD
SYSOUT=&REPCLA
//
PEND
//*
//S1
EXEC SSSPR01
System knows that the 3 DD’s are SYSOUT=*, due to the default
specification at PROC statement.
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PROCs – symbolic parameters
(to override it)
To change the default value
:
One must specify the new value when PROC is invoked.
//JOBEXEMP JOB (1234),’ALBERTO’,CLASS=B
//SSSPRO1 PROC REPCLA=*
//STEPA
EXEC PGM=PPPX1
//DD1
DD
DSN=ARQALB.DATA.DISP=SHR
//REPORT1 DD
SYSOUT=&REPCLA
//STEPB
EXEC PGM=PPPX2
//REPORT2 DD
SYSOUT=&REPCLA
//STEPC
EXEC PGM=PPPX3
//REPORT3 DD
SYSOUT=&REPCLA
//
PEND
//*
//S1
EXEC SSSPR01,REPCLA=A
System knows that the 3 DDs are SYSOUT=A, due to the override
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PROCs – symbolic parameters
(override)
In this case
//JOBEXEMP JOB (1234),’ALBERTO’,CLASS=B
//SSSPRO1 PROC REPCLA=*
//STEPA
EXEC PGM=PPPX1
//DD1
DD
DSN=ARQALB.DATA.DISP=SHR
//REPORT1 DD
SYSOUT=&REPCLA
//STEPB
EXEC PGM=PPPX2
//REPORT2 DD
SYSOUT=&REPCLA
//STEPC
EXEC PGM=PPPX3
//REPORT3 DD
SYSOUT=&REPCLA
//
PEND
//*
//S1
EXEC SSSPR01,RELCLA=A
//S2
EXEC SSSPR01
System knows that the 3 step S1 DDs are SYSOUT=A and
the 3 step S2 DD’s are SYSOUT=*
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PROCs – symbolic parameters
(override)
One can alter only the desired DDs:
//JOBEXEMP JOB (1234),’ALBERTO’,CLASS=B
//SSSPRO1 PROC REPCLA=*
//STEPA
EXEC PGM=PPPX1
//DD1
DD
DSN=ARQALB.DATA.DISP=SHR
//REPORT1 DD
SYSOUT=&REPCLA
//STEPB
EXEC PGM=PPPX2
//REPORT2 DD
SYSOUT=&REPCLA
//STEPC
EXEC PGM=PPPX3
//REPORT3 DD
SYSOUT=&REPCLA
//
PEND
//*
//S1
EXEC SSSPR01,REPCLA.STEPA=A,REPCLA.STEPC=R
//S2
EXEC SSSPR01,REPCLA.STEPB=X
System knows that:
REPORT1, STEPA, procstep
REPORT1, STEPB, procstep
REPORT1, STEPC, procstep
REPORT1, STEPA, procstep
REPORT1, STEPB, procstep
REPORT1, STEPC, procstep
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S1
S1
S1
S2
S2
S2
:
:
:
:
:
:
SYSOUT=A
SYSOUT=*
SYSOUT=R
SYSOUT=*
SYSOUT=X
SYSOUT=*
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PROCs – symbolic parameters
To override symbolic parameters default values,
one must specify the new value in when proc is
invoked. :
.
ddname step_name=xxx
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PROCs – symbolic parameters
Another way to change default, valid for the whole or part of
the job, is via SET command:
Syntax :
//[name]
SET symbolic_variable=[value]
//SSSPRO1 PROC
//STEPA
EXEC PGM=PPPX1
//DD1
DD
DSN=...
//SYSPRINT DD
SYSOUT=&REPCLA
//STEPB
EXEC PGM=PPPX2
//SYSPRINT DD
SYSOUT=&REPCLA
//STEPC
EXEC PGM=PPPX3
//SYSPRINT DD
SYSOUT=&REPCLA
//
PEND
//
SET REPCLA=A
//STEP1
EXEC SSSPR01
//STEP2
EXEC SSSPR01
//STEP3
EXEC SSSPR01
//STEP4
EXEC SSSPR01
//STEP5
EXEC SSSPR01
//
SET REPCLA=B
//STEP6
EXEC SSSPR01
//STEP7
EXEC SSSPR01
//STEP8
EXEC SSSPR01
//STEP9
EXEC SSSPR01
//STEP10
EXEC SSSPR01
Steps 01, 02, 03, 04 and 05 have REPCLA value A
Steps 06, 07, 08, 09 and 10 have RELCLA value B
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PROCs – including DD in the proc
Including DD in the proc
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PROCS – including DD in the proc
If you need to include a DD (there is no such DD in
the PROC, it must be included to the step’s DDs) :
.
//stepname ddname DD
parameters
Ex.:
//S2
EXEC SSSPR01,REPCLA.STEPB=X
//STEPB.REPOTHER DD SYSOUT=*
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PROCS – including datasets in the proc
Including datasets
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PROCs – includind datasets
Additional dataset:
If it is necessary to include a dataset (there is no such
DD in the PROC, it must be included to the step’s
DDs):
.
//stepname ddname DD
parameters
Ex.:
//S2
EXEC SSSPR01,REPCLA.STEPB=X
//STEPB.REPOTHER DD SYSOUT=*
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PROCs – including datasets
To include one more dataset in a concatenation
sequence:
To include one additional dataset (to concatenate) in
na existing DD: specify 1 DD for each existant DD,
without parameters, and add the desired one as the
last DD.
//stepnameddname DD
//
DD
//
DD new_dataset
Example :
//STEP1
EXEC PROCX1
//STEPA.DD2 DD
//
DD
//
DD DSN=TST.ARQUIVOX...
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PROCs – changing EXEC parameters
Changing EXEC parameters
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PROCs – changing EXEC paameters
When invoking the PROC, specify the parameter
and stepname you wish to change:
//stepname EXEC PROC=xxx,parameter.stepname=value
Ex.:
//S2 EXEC SSSPR01,RELCLA.STEPB=X,PARM.STEPB=‘YES’
//STEPB.RELOUTRO DD SYSOUT=*
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JCL – IF / THEN / ELSE / ENDIF
IF / THEN / ELSE / ENDIF
Commands
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JCL – IF / THEN / ELSE / ENDIF
These commands coan be used rather than COND (and they’re
easyer to understand...).
Syntax :
//
IF (condition) THEN
statements to execute if condition is TRUE
//
ENDIF
or
//
IF (condition) THEN
statements to execute if condition is TRUE
//
ELSE
statements to execute if condition is FALSE
//
ENDIF
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JCL – IF / THEN / ELSE / ENDIF
Condition = indicates that the statements below THEN must be
executed if condition is TRUE. The tests may be as follows:
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JCL – IF / THEN / ELSE / ENDIF
To test the previous’ step return code:
[stepname.]RC
[stepname.]RC
[stepname.]RC
[stepname.]RC
[stepname.]RC
[stepname.]RC
[stepname.]RC
[stepname.]RC
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EQ
GT
LT
NE
NL
NG
GE
LE
return_code
return_code
return_code
return_code
return_code
return_code
return_code
return_code
or
or
or
or
or
or
or
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JCL – IF / THEN / ELSE / ENDIF
To test whether a previous step was executed or not (not flushed
or flushed) :
[stepname.]RUN EQ TRUE
ou
[stepname.]RUN EQ FALSE
[stepname.]RUN EQ TRUE ou
[stepname.]RUN EQ FALSE
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JCL – IF / THEN / ELSE / ENDIF
To test whether a previous step has abended or not:
[stepname.]ABEND EQ TRUE
[stepname.]ABEND EQ FALSE
or
[stepname.]ABEND EQ TRUE or
[stepname.]ABEND EQ FALSE
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JCL – IF / THEN / ELSE / ENDIF
To test a previous’ step Completion Code (system or user) :
[stepname.]ABENDCC EQ Snnn or
[stepname.]ABENDCC EQ Unnnn
[stepname.]ABENDCC EQ Snnn
[stepname.]ABENDCC EQ Unnnn
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JCL – IF / THEN / ELSE / ENDIF
Multiple contitions:
Use parenthesis to specify test priority and sequence.
Use & for and
Use
| for or
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JCL – IF / THEN / ELSE / ENDIF
ENDIF is mandatory to specify the end of the set of commands to be
executed, with or withot ELSE.
ELSE is optional.
IMPORTANT : Use of COND + IF / THEN / ELSE / ENDIF
together is extremely confusing. DON’T DO THAT!
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JCL – IF / THEN / ELSE / ENDIF
Example :
//ARSARS01 JOB (1234),'ROMANO',CLASS=1,MSGCLASS=X
//*-----------------------------------------------------------//STEP01 EXEC PGM=IEFBR14
//STEP02 EXEC PGM=IEFBR14
//
IF (STEP01.RC NG 0) THEN
//STEP03 EXEC PGM=IEFBR14
//
ENDIF
//*-----------------------------------------------------------//STEP04 EXEC PGM=IEFBR14
//
IF ((STEP01.RC EQ 0)) THEN
//STEP05 EXEC PGM=IEFBR14
//
ELSE
//STEP06 EXEC PGM=IEFBR14
//
ENDIF
//*-----------------------------------------------------------//STEP07 EXEC PGM=IEFBR14
//
IF ((STEP01.RUN EQ TRUE)) THEN
//STEP08 EXEC PGM=IEFBR14
//
ENDIF
//
IF ((STEP01.RUN EQ FALSE)) THEN
//STEP09 EXEC PGM=IEFBR14
//
ENDIF
The execution of this JCL results in:
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JCL – IF / THEN / ELSE / ENDIF
Example :
$HASP373 LSG#@ARS STARTED - INIT 2
IEF403I LSG#@ARS - STARTED - TIME=14.52.18
#
# JOBNAME STEPNAME PROCSTEP PROGRAM
RC
# LSG#@ARS STEP01
IEFBR14
00
# LSG#@ARS STEP02
IEFBR14
00
# LSG#@ARS STEP03
IEFBR14
00
# LSG#@ARS STEP04
IEFBR14
00
# LSG#@ARS STEP05
IEFBR14
00
# LSG#@ARS STEP06
IEFBR14 FLUSH
# LSG#@ARS STEP07
IEFBR14
00
# LSG#@ARS STEP08
IEFBR14
00
# LSG#@ARS STEP09
IEFBR14 FLUSH
IEF404I LSG#@ARS - ENDED - TIME=14.52.19
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Appendix - CONTROL’s – BMC Software
Produto
Função
Control-M
Automated Production Control and Scheduling System
Manages and automates the setup, scheduling and execution of jobs in the data
center.
Control-M / Restart
Restart Management System
Automates the activities that must be performed when restarting failed jobs,
including the scratching and uncataloging of datasets created by failed jobs.
Control-M / Tape
Removable Media Management System
Increases utilization of removable media and controls retention periods. Prevents
misuse of media, and provides tape library and vault control.
Control-M /
Analyser
Automated Information Integrity System
Performs in-stream validation, accuracy, and reasonability checks on information
used by data center production tasks (for example, reports, databases).
Control-D
Output Management System Automatically schedules
and controls every aspect of report processing and distribution, including report
decollating, bundling, printing, online viewing, and archiving.
Control-V
Quick Access Archive Viewing System
Provides online access to archived reports and documents by indexed data retrieval
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CONTROL’s – BMC Software
Produto
Função
Control-D / Page
on demand
Report Retrieval and Display System
Enables end users to retrieve and view pages of reports that reside on mainframe
storage in real time. Indexed reports can be retrieved by index name and value.
AFP and XEROX reports can also be retrieved and displayed
using CONTROL-D/Web Access Server or CONTROL-D/Page On Demand API.
Control-D / Image
Image Output Management System
Enables output from commercial imaging equipment to be imported into either
CONTROL-D or CONTROL-V for decollation, distribution and viewing, and into
CONTROL-V for archiving and indexed retrieval.
Control-O
Console Automation System and Desired State
Monitoring System
Monitors and automatically responds to messages, commands, and dataset events,
as well as various other system events.
The CONTROL-O/COSMOS feature allows for status monitoring while maintaining
all critical system objects in a desired and ideal status.
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THE END
Summary
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