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kanitha-mvs · Beginner Joined: 17 May 2006 Posts: 26 Topics: 17

Hi,

Is there any way to calculate the space occupied by the dataset using the LRECL and BLOCKsize information.

Thanks.

Nic Clouston · Posted: Wed May 28, 2008 6:02 am Post subject:

LRECL and BLKSIZE alone will not give you the space. You need to know how many records are in the file. Maybe you do not undesrtand LRECL and BLKSIZE and the relationship between the two? One place to check this would be the JCL manual. Also look at the SPACE parameter whilst you are doing that.
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Utility and Program control cards are NOT, repeat NOT, JCL.

Terry_Heinze · Posted: Wed May 28, 2008 8:24 am Post subject:

In addition to what Nic said, you didn't indicate the DSORG. Is it F, FB, V, VB, Spanned, VSAM, PO?
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....Terry

kanitha-mvs · Beginner Joined: 17 May 2006 Posts: 26 Topics: 17

Hi,

I want to know the space occupied by the dataset that is in migrated status in DASD. The HLIST command provides details about the tracks usage for a migrated dataset without recalling them..

Like this command, is there any command available that will provide the dataset information (Management class, storage class info..) and actual space occupied by migrated dataset without recalling it?

Thanks,

Nic Clouston · Posted: Fri May 30, 2008 5:14 am Post subject:

Why not just HRECALL it, get the info you want ant then HMIG it again? You would have the info by now.

The info ISPF returns is based on current usage. If it is a GDG then looking at a non-migrated version will give you most of the info you want. The space would depend on how well the JCL was coded and the data.
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Utility and Program control cards are NOT, repeat NOT, JCL.

expat · Posted: Sat May 31, 2008 4:12 am Post subject:

You can download the MCDS and use SAS or REXX to analyse the data, or maybe look at DCOLLECTdata.
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tcurrier · Intermediate Joined: 10 Feb 2006 Posts: 188 Topics: 68

IDCAMS with the LISTCAT function will give you everything you're looking for, EXCEPT for the space used.

Nic Clouston · Posted: Tue Jun 10, 2008 3:21 am Post subject:

Hmmm, a LISTVTOC would give the space - on that volume. You could rig a rexx program to do the listcat, extract the volumes, do the LISTVTOCs and extract the data and calulate the space used. But will it work for migrated datasets? Are they compressed? Other things.
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Utility and Program control cards are NOT, repeat NOT, JCL.

expat · Posted: Sat Jun 21, 2008 5:12 am Post subject:

Actually, the HLIST command will tell you what the space allocation would be for when the dataset os recalled / recovered.
_________________
If it's true that we are here to help others,
then what exactly are the others here for ?