MVSFORUMS.com

momatwork · Beginner Joined: 14 Feb 2005 Posts: 2 Topics: 1

I keep having space issues (B37 abends) on a step in one of my jobs.
It uses a dataset with a disp=shr, that also includes a space allocation.
Is the space allocation used with a shared dataset actually used? Since the file exists, wouldn't it ignore the the space allocation? I cannot find an answer to this question.
//SORTOUT DD DSN=mydataset ,
// DISP=SHR,
// UNIT=(SYSDA,9),
// SPACE=(CYL,(250,350),RLSE),
// DCB=RECFM=FB

programmer1 · Beginner Joined: 18 Feb 2004 Posts: 138 Topics: 14

As per my understanding, giving a space parameter for disp=shr will have no impact on the space allocation.
_________________
Regards,
Programmer

Bill Dennis · Posted: Tue Feb 15, 2005 8:49 am Post subject:

If your dataset was originally allocated with zero secondary space amt, you can add a secondary amt by including the SPACE parameter on the DD.
_________________
Regards,
Bill Dennis

Disclaimer: My comments on this foorum are my own and do not represent the opinions or suggestions of any other person or business entity.

kolusu · Posted: Tue Feb 15, 2005 10:21 am Post subject:

momatwork,

Check this link which explains in detail about allocating space depending on the no: of records and lrecl

http://www.mvsforums.com/helpboards/viewtopic.php?t=28&highlight=optimum

Kolusu
_________________
Kolusu
www.linkedin.com/in/kolusu

momatwork · Beginner Joined: 14 Feb 2005 Posts: 2 Topics: 1

kolusu,
thanks for the allocation reference. i will use that BUT...does a space allocation on a shared dataset get looked at? refer to my code in first post.
thanks, momatwork

Bill Dennis · Posted: Wed Feb 16, 2005 1:07 pm Post subject:

Refer to my post above:
The primary amt is ignored because the dataset already has space allocated. The secondary amt will be used if the datasets needs to take another extent.
_________________
Regards,
Bill Dennis

Disclaimer: My comments on this foorum are my own and do not represent the opinions or suggestions of any other person or business entity.

mahendar.n · Beginner Joined: 28 Feb 2005 Posts: 7 Topics: 5

I have a output file for which the primary and secondry qtys are already allocated .

Consider the output file needs to be expanded.
If i give the space parameter will it override the allocated space ???????

I gone thru this topic still the Answer for this not clear.

can i extend the space for the file dynamically in jcl or not???????
pls clarify

kolusu · Posted: Mon Feb 28, 2005 8:48 am Post subject:

mahendar.n,

Bill Dennis · Posted: Mon Feb 28, 2005 9:04 am Post subject:

If you read my answers you'll see that the new secondary type and quantity will be used when specified on the DD with DISP=SHR and the dataset needs another extent. Am I wasting my keystrokes?
_________________
Regards,
Bill Dennis

Disclaimer: My comments on this foorum are my own and do not represent the opinions or suggestions of any other person or business entity.