How to calulate space of deleted datasets?

MoganaKumaran · New User Joined: 26 Jun 2007 Posts: 20 Location: Chennai

I just thought of doing a process improvement to my application, I found
around 4000 test datasets can be deleted. I just wrote a simple code with 2 steps, in the first step using SORT utility it adds a DELETE before each and every dataset stored in a flatfile.In my second step I used a IDCAMS
utility to delete the datasets.

Now my management need an informatin regarding the space i saved by deleting them and also its equivalnet financial value.

Could anyone please guide me to calculate the space occupied by this datasets approximately and also it s financial value.

Thanks,
Mohan

CICS Guy · Posted: Thu Apr 17, 2008 7:53 pm

If they are gone and you didn't already have the space saved, maybe SMF records might help......
Financial value is a subjective thing......
Your management should have mentioned its needs before the delete......

MoganaKumaran · New User Joined: 26 Jun 2007 Posts: 20 Location: Chennai

I understand this but this is only a first phase of my process, yet I have another 5000 datasets to be deleted. Can you suggest me some information on how to calculate space occupied by a datset in MB.

Thanks ,
Mohan

CICS Guy · Posted: Thu Apr 17, 2008 8:03 pm

Look at their curent allocations, add them together?

enrico-sorichetti · Posted: Thu Apr 17, 2008 8:06 pm

I wonder wahy with such a huge number of datasets, there is not any storage accounting in place yet...

anyway for a good estimate You can start by running an
IDCAMS DCOLLECT ( which by the way it will also collect the MCDS infor )

wich will collect the exact info for all the space utilization
and theYou can start by looking at

File # 206 DCOLLECT REXX execs from Linnea Nichols
www.cbttape.org/ftp/cbt/CBT206.zip
a reasonable good tool ( must be reviewed, but a very good starting point )

or look at the dcollect dfsort samples... another way of getting spce statistics

MoganaKumaran · New User Joined: 26 Jun 2007 Posts: 20 Location: Chennai

Thanks for your info.

If you dont mind can you give me an example for this.Also i have around 4000 datasets to be deleted , If i start to recall all of them and identify the space it s going to cost me more than deletion of them.

can u correct me if I m wrong?

Thanks in advance,
Mohan

enrico-sorichetti · Posted: Thu Apr 17, 2008 8:08 pm

see my previous post....

expat · Posted: Fri Apr 18, 2008 12:03 pm

Mmmmmmmmmmmmm, interesting concept.

Just how much DASD space does an ML2 dataset use ?