Answer / sunitha

Ans: The DD statement links the external dataset to the
ddname coded within the executing program. It links the
files within the program code to the filenames known to the
MVS Operating system. The syntax is:
//DDANAME DD DSN=NAME,
// DISP=(NEW,CATLG,DELETE),
// DCB=(DSORG=PS,RECFM=FB,LRECL=80,BLKSIZE=800),
// SPACE=(CYL,(20,5),RLSE),
// UNIT=SYSDA

DSN- Name of the dataset- separated by periods, each name 1
to 8 characters, total 44 chars including periods.
DISP- It specifies the disposition of the dataset.
DISP=(status,normal-disposition,abnormal-disposition)
Status – The statuses NEW,MOD,OLD,SHR are the status of the
dataset at the beginning of the step.
NEW is given to create a new dataset. It is the default if
anything is not coded.
OLD designates an existing dataset with exclusive control.
SHR designates an existing dataset without exclusive
control.
MOD is used to extend the dataset if it exists or to create
a new one if it does not exist.
Normal-disposition- It directs the system on the
disposition of the data set (pass, keep, catlg, uncatlg,
delete) when the step ends normally.
Abnormal-disposition- It directs the system on the
disposition of the data set (keep, catlg, uncatlg, delete)
when the step ends abnormally.
DCB- Physical characteristics of a Data Set are described
by DCB Parameters. These parameters must be coded for newly
created data set as well as for existing Datasets.
• LRECL=n (VALUE IN BYTES)
• RECFM=(F/FB/V/VB/U)
• BLKSIZE= multiple of LRECL
• DSORG=(PS/PO/DA)
PO: specifies a partitioned Organization, DA: specifies a
direct organization.
SPACE=(space units,
(primary,secondary,dir),RLSE,CONTIG,MXIG,ROUND)
space unit - TRK(tracks)/CYL(cylinders)/BLOCKSIZE in bytes.
In our above example it allocates 20 cycles primary and if
required allocates 5 secondary cycles.
RLSE- Request to release the space that is primarily
allocated if unused.
CONTIG- Request for contiguous space.
MXIG- Request for large area of contiguous space.
ROUND- Request for entire cylinder for storage of dataset.
UNIT parameter indicates the information about input or
output device that will be used
by the dataset. It specifies a group name, device type, or
device number that identifies the
device where the file resides. The Format of the UNIT
parameter is UNIT= groupname/
device-type/device number.
VOL parameter is primarily used for tapes. A volume is the
portion of the storage device served by one read/write
mechanism. To request specific volumes, we code
VOL=SER=volume for one volume or VOL=SER=(volume, volume…)
for multiple volumes. Volume serial numbers are one to six
characters.
SYSOUT parameter is used to route the output to a device.
// DDNAME DD SYSOUT=CLASS

Answer / guest

The DD statement links the external dataset name (DSN) to
the DDNAME coded within the executing program. It links the
file names within the program code to the file names know to
the MVS operating system. The syntax is // ddname DD
DSN=dataset name. Other keywords after DSN are DISP, DCB,
SPACE, etc.

Explain the function of //cntl statement?

0 Answers  

---

what is the cond=even only

4 Answers   EDS,

---

I HAVE A VB BLOCK WHICH IS USED AS INPUT IN COBOL CONATINING SOME RECORDS CAN I CHANGE THE FILE FROM VB TO FB?

0 Answers  

---

What is the function of dd name parameter with a 2 part structure; audit.report?

0 Answers  

---

How can I override a dsn that is contained in a proc called by another proc? I need to do the override in the calling JCL.

3 Answers  

---

Explain about ISPFTTRC

1 Answers  

---

a job have 5 steps and it will executes a proc which have 5steps in it. now i have to execute step3 only when step2 of proc executes successfully

3 Answers  

---

What is the use of ikjeft1b utility in jcl?

1 Answers  

---

I have DATE filed like DD-MM-YYYY, So I want output should be MM/DD/YYYY using JCL? Can anybody post the answer for above requirement?

4 Answers   BirlaSoft, FIS, Wipro,

---

Name what parameter directs the output of the job log dataset?

0 Answers  

---

How to pass values in jcl to cobol?

4 Answers   IBM, Infosys,

---

A statement about PROCs is " In PROCs, Symbolic Parameters can be assigned on PROC and EXEC", BUT On which EXEC, (i) On the JCL's EXEC which is calling to PROC1. (Inside JCL, EXEC PROC1) (ii) or On the PROC's EXEC where it calls the PGM1. (Inside PROC, EXEC PGM=PGM1)

2 Answers   IBM,

---