what are the default DISP Parameters for an existing dataset

kiran_65 · New User Joined: 01 Apr 2005 Posts: 46

Hi All,

could you please let me know

"what are the default DISP Parameters for an existing dataset?"

is it shr or old?

ofer71 · Posted: Thu Dec 14, 2006 11:59 am

It took me about 10 seconds to find the answer in the fine manual.

O.

Rajen · New User Joined: 05 May 2005 Posts: 61

Hi kiran,

I guess you have confusion for DISP parameter for new and existing dataset.

As mentioned in the manual given by ofer71,
When u omit DISP parameter by dafault it will take NEW in effect.
If you omit the DISP parameter it will take DISP=NEW and your job abends shouting JCL ERROR.

Let me know if it is still not clear.

Thanks,
Rajen.

DavidatK · Posted: Thu Dec 14, 2006 11:22 pm

kiran,

I think the question being asked is whether DISP 'OLD' or 'SHR' should be used with existing datasets.

DISP=OLD is an exclusive use of the dataset. No-one can use the dataset while you are using it.

DISP=SHR will allow other programs to access the dataset at the same time your using it.

There are a couple of things to consider when choosing DISP=OLD or DISP=SHR . Using either has their good and bad points.

If everyone used DISP=OLD on a dataset that was in heavy use would cause the jobs to run sequentially. It could take a long time to get through the job stream. On the other hand, if you have a job that is time crucial, you may want to use DISP=OLD to remove the processing from other jobs against the dataset.

If you are updating the dataset, it?s always a good idea to use DISP=OLD.

If your job does not update the dataset, using DISP=SHR is probably right.

Dave

kiran_65 · New User Joined: 01 Apr 2005 Posts: 46

Thanks for all your answers.

but, i read some where that it will take NEW,DELETE,DELETE as default for an existing dataset

Actually my question is as below:

If the "DISP=" keyword is not coded for an existing dataset, what default values will be
used for "DISP="?

Please let me know the answer.

Regards,
Kiran

priyesh.agrawal · Posted: Fri Dec 15, 2006 11:34 am

Kiran...

Arun Raj · Posted: Fri Dec 15, 2006 5:26 pm

Hi Kiran

You cant omit the DISP parameter for an existing dataset.It should be OLD/SHR/MOD.

Thanks
Arun

DavidatK · Posted: Fri Dec 15, 2006 7:33 pm

Kiran,

You are right that the defaut value given if DISP is not coded is 'NEW,DELETE,DELETE'. This is true for anytime it is not coded, not only for existing datasets.

--With a dataset not currently cataloged

vibhor_thebest · New User Joined: 18 Dec 2006 Posts: 3 Location: noida

hello folks,
i have a doubt in continuation with the discussion going on.
can anybody please tell me wat is the meaning of the 2nd and 3rd parameters in DISP=(new/old,---,-

priyesh.agrawal · Posted: Tue Dec 19, 2006 3:54 am