enrico-sorichetti
Superior Member
Joined: 14 Mar 2007
Posts: 10873
Location: italy
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Difference between DUMMY and NULLFILE?
There is no difference
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NULLFILE
Specifies a dummy data set. NULLFILE has the same effect as coding the DD DUMMY parameter. NULLFILE must be coded as a single-word parameter. For instance, IBM does not support the use of NULLFILE to obtain a dummy data set for these (or other) formats:
When followed by a member name
As a qualifier in a qualified data set name
As a temporary data set name.
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and demonstrated here
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********************************* TOP OF DATA **********************************
J E S 2 J O B L O G -- S Y S T E M S Y S 1 -- N
12.34.51 JOB04443 ---- MONDAY, 17 OCT 2016 ----
12.34.51 JOB04443 IRR010I USERID ENRICO IS ASSIGNED TO THIS JOB.
12.34.51 JOB04443 ICH70001I ENRICO LAST ACCESS AT 12:34:32 ON MONDAY, OCTOBER
12.34.51 JOB04443 $HASP373 ENRICO1 STARTED - INIT 1 - CLASS A - SYS SYS1
12.34.51 JOB04443 IEF403I ENRICO1 - STARTED - TIME=12.34.51
12.34.51 JOB04443 IEF404I ENRICO1 - ENDED - TIME=12.34.51
12.34.51 JOB04443 $HASP395 ENRICO1 ENDED
------ JES2 JOB STATISTICS ------
17 OCT 2016 JOB EXECUTION DATE
14 CARDS READ
58 SYSOUT PRINT RECORDS
0 SYSOUT PUNCH RECORDS
3 SYSOUT SPOOL KBYTES
0.00 MINUTES EXECUTION TIME
1 //ENRICO1 JOB NOTIFY=ENRICO,
// CLASS=A,MSGCLASS=X,MSGLEVEL=(1,1)
//* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
//*
2 //G EXEC PGM=IEBGENER
//*
3 //SYSIN DD DUMMY
//*
4 //SYSPRINT DD SYSOUT=*
5 //SYSUT1 DD DISP=SHR,DSN=ENRICO.TEST.ZA
6 // DD DISP=SHR,DSN=ENRICO.TEST.ZB
7 // DD DISP=SHR,DSN=ENRICO.TEST.ZC
//*
8 //SYSUT2 DD SYSOUT=*
ICH70001I ENRICO LAST ACCESS AT 12:34:32 ON MONDAY, OCTOBER 17, 2016
IEF236I ALLOC. FOR ENRICO1 G
IEF237I DMY ALLOCATED TO SYSIN
IEF237I JES2 ALLOCATED TO SYSPRINT
IEF237I 0AB3 ALLOCATED TO SYSUT1
IEF237I 0AB4 ALLOCATED TO
IEF237I 0AB1 ALLOCATED TO
IEF237I JES2 ALLOCATED TO SYSUT2
IEF142I ENRICO1 G - STEP WAS EXECUTED - COND CODE 0000
IEF285I ENRICO.ENRICO1.JOB04443.D0000101.? SYSOUT
IEF285I ENRICO.TEST.ZA KEPT
IEF285I VOL SER NOS= STOR03.
IEF285I ENRICO.TEST.ZB KEPT
IEF285I VOL SER NOS= STOR04.
IEF285I ENRICO.TEST.ZC KEPT
IEF285I VOL SER NOS= STOR01.
IEF285I ENRICO.ENRICO1.JOB04443.D0000102.? SYSOUT
IEF373I STEP/G /START 2016291.1234
IEF374I STEP/G /STOP 2016291.1234 CPU 0MIN 00.06SEC SRB 0MIN 00.01S
IEF375I JOB/ENRICO1 /START 2016291.1234
IEF376I JOB/ENRICO1 /STOP 2016291.1234 CPU 0MIN 00.06SEC SRB 0MIN 00.01S
DATA SET UTILITY - GENERATE
IEB352I WARNING: ONE OR MORE OF THE OUTPUT DCB PARMS COPIED FROM INPUT
PROCESSING ENDED AT EOD
za
zb
zc
******************************** BOTTOM OF DATA ******************************** |
| Code: |
********************************* TOP OF DATA **********************************
J E S 2 J O B L O G -- S Y S T E M S Y S 1 -- N
12.35.31 JOB04444 ---- MONDAY, 17 OCT 2016 ----
12.35.31 JOB04444 IRR010I USERID ENRICO IS ASSIGNED TO THIS JOB.
12.35.31 JOB04444 ICH70001I ENRICO LAST ACCESS AT 12:34:51 ON MONDAY, OCTOBER
12.35.31 JOB04444 $HASP373 ENRICO1 STARTED - INIT 1 - CLASS A - SYS SYS1
12.35.31 JOB04444 IEF403I ENRICO1 - STARTED - TIME=12.35.31
12.35.31 JOB04444 IEF404I ENRICO1 - ENDED - TIME=12.35.31
12.35.31 JOB04444 $HASP395 ENRICO1 ENDED
------ JES2 JOB STATISTICS ------
17 OCT 2016 JOB EXECUTION DATE
15 CARDS READ
58 SYSOUT PRINT RECORDS
0 SYSOUT PUNCH RECORDS
3 SYSOUT SPOOL KBYTES
0.00 MINUTES EXECUTION TIME
1 //ENRICO1 JOB NOTIFY=ENRICO,
// CLASS=A,MSGCLASS=X,MSGLEVEL=(1,1)
//* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
//*
2 //G EXEC PGM=IEBGENER
//*
3 //SYSIN DD DUMMY
//*
4 //SYSPRINT DD SYSOUT=*
5 //SYSUT1 DD DISP=SHR,DSN=ENRICO.TEST.ZA
6 // DD DUMMY
7 // DD DISP=SHR,DSN=ENRICO.TEST.ZB
8 // DD DISP=SHR,DSN=ENRICO.TEST.ZC
//*
9 //SYSUT2 DD SYSOUT=*
ICH70001I ENRICO LAST ACCESS AT 12:34:51 ON MONDAY, OCTOBER 17, 2016
IEF236I ALLOC. FOR ENRICO1 G
IEF237I DMY ALLOCATED TO SYSIN
IEF237I JES2 ALLOCATED TO SYSPRINT
IEF237I 0AB3 ALLOCATED TO SYSUT1
IEF237I DMY ALLOCATED TO
IEF237I 0AB4 ALLOCATED TO
IEF237I 0AB1 ALLOCATED TO
IEF237I JES2 ALLOCATED TO SYSUT2
IEF142I ENRICO1 G - STEP WAS EXECUTED - COND CODE 0000
IEF285I ENRICO.ENRICO1.JOB04444.D0000101.? SYSOUT
IEF285I ENRICO.TEST.ZA KEPT
IEF285I VOL SER NOS= STOR03.
IEF285I ENRICO.TEST.ZB KEPT
IEF285I VOL SER NOS= STOR04.
IEF285I ENRICO.TEST.ZC KEPT
IEF285I VOL SER NOS= STOR01.
IEF285I ENRICO.ENRICO1.JOB04444.D0000102.? SYSOUT
IEF373I STEP/G /START 2016291.1235
IEF374I STEP/G /STOP 2016291.1235 CPU 0MIN 00.04SEC SRB 0MIN 00.00S
IEF375I JOB/ENRICO1 /START 2016291.1235
IEF376I JOB/ENRICO1 /STOP 2016291.1235 CPU 0MIN 00.04SEC SRB 0MIN 00.00S
DATA SET UTILITY - GENERATE
IEB352I WARNING: ONE OR MORE OF THE OUTPUT DCB PARMS COPIED FROM INPUT
PROCESSING ENDED AT EOD
za
******************************** BOTTOM OF DATA ******************************** |
| Code: |
********************************* TOP OF DATA **********************************
J E S 2 J O B L O G -- S Y S T E M S Y S 1 -- N
12.58.01 JOB04446 ---- MONDAY, 17 OCT 2016 ----
12.58.01 JOB04446 IRR010I USERID ENRICO IS ASSIGNED TO THIS JOB.
12.58.01 JOB04446 ICH70001I ENRICO LAST ACCESS AT 12:36:15 ON MONDAY, OCTOBER
12.58.01 JOB04446 $HASP373 ENRICO1 STARTED - INIT 1 - CLASS A - SYS SYS1
12.58.01 JOB04446 IEF403I ENRICO1 - STARTED - TIME=12.58.01
12.58.01 JOB04446 IEF404I ENRICO1 - ENDED - TIME=12.58.01
12.58.02 JOB04446 $HASP395 ENRICO1 ENDED
------ JES2 JOB STATISTICS ------
17 OCT 2016 JOB EXECUTION DATE
15 CARDS READ
59 SYSOUT PRINT RECORDS
0 SYSOUT PUNCH RECORDS
3 SYSOUT SPOOL KBYTES
0.00 MINUTES EXECUTION TIME
1 //ENRICO1 JOB NOTIFY=ENRICO,
// CLASS=A,MSGCLASS=X,MSGLEVEL=(1,1)
//* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
//*
2 //G EXEC PGM=IEBGENER
//*
3 //SYSIN DD DUMMY
//*
4 //SYSPRINT DD SYSOUT=*
5 //SYSUT1 DD DISP=SHR,DSN=ENRICO.TEST.ZA
6 // DD DISP=SHR,DSN=ENRICO.TEST.ZB
7 // DD DSN=NULLFILE
8 // DD DISP=SHR,DSN=ENRICO.TEST.ZC
//*
9 //SYSUT2 DD SYSOUT=*
ICH70001I ENRICO LAST ACCESS AT 12:36:15 ON MONDAY, OCTOBER 17, 2016
IEF236I ALLOC. FOR ENRICO1 G
IEF237I DMY ALLOCATED TO SYSIN
IEF237I JES2 ALLOCATED TO SYSPRINT
IEF237I 0AB3 ALLOCATED TO SYSUT1
IEF237I 0AB4 ALLOCATED TO
IEF237I DMY ALLOCATED TO
IEF237I 0AB1 ALLOCATED TO
IEF237I JES2 ALLOCATED TO SYSUT2
IEF142I ENRICO1 G - STEP WAS EXECUTED - COND CODE 0000
IEF285I ENRICO.ENRICO1.JOB04446.D0000101.? SYSOUT
IEF285I ENRICO.TEST.ZA KEPT
IEF285I VOL SER NOS= STOR03.
IEF285I ENRICO.TEST.ZB KEPT
IEF285I VOL SER NOS= STOR04.
IEF285I ENRICO.TEST.ZC KEPT
IEF285I VOL SER NOS= STOR01.
IEF285I ENRICO.ENRICO1.JOB04446.D0000102.? SYSOUT
IEF373I STEP/G /START 2016291.1258
IEF374I STEP/G /STOP 2016291.1258 CPU 0MIN 00.05SEC SRB 0MIN 00.01S
IEF375I JOB/ENRICO1 /START 2016291.1258
IEF376I JOB/ENRICO1 /STOP 2016291.1258 CPU 0MIN 00.05SEC SRB 0MIN 00.01S
DATA SET UTILITY - GENERATE
IEB352I WARNING: ONE OR MORE OF THE OUTPUT DCB PARMS COPIED FROM INPUT
PROCESSING ENDED AT EOD
za
zb
******************************** BOTTOM OF DATA ******************************** |
edited to change the location of the dsn=nullfile |
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