IBM Mainframe Forum

Hi everyone,

I'm trying to retrieve the space occupied by some VSAM Files in TRACKS.
I could easily retrieve it by running and parsing the result of a LISTCAT.

But I was wondering if it's possible using another method.

- I tried using and parsing DCOLLECT in PL/I but the result aren't exactly the same
==> I retrieve HARBA and DCACISZ but i can't get the equivalent of PHYRECS/TRK, so that my result lacks of precision.
I assumed that the number of Block per Track is equal to round(56 664 / Blksize) but unfortunately it's not always true.

- I tried using IGGCSI via HLASM, and I get the same result

Is there any other way to get the actual number of Block per track

Thanks

I assumed that the number of Block per Track is equal to round(56 664 / Blksize) but unfortunately it's not always true.

You assumed wrongly
IGGCSI is a <programmatic> interface to the catalog content so it will not give more than a plain LISTCAT
since I do not feel retyping the whole shebang... see this thread
http://ibmmainframes.com/about35906.html

enrico-sorichetti wrote:

I assumed that the number of Block per Track is equal to round(56 664 / Blksize) but unfortunately it's not always true.

You assumed wrongly
IGGCSI is a <programmatic> interface to the catalog content so it will not give more than a plain LISTCAT
since I do not feel retyping the whole shebang... see this thread
http://ibmmainframes.com/about35906.html

Thanks for the quick reply

The correct way, regardless of access method, to get the number of physical records / track is to use the Assembler TRKCALC macro, which is described here.

steve-myers wrote:The correct way, regardless of access method, to get the number of physical records / track is to use the Assembler TRKCALC macro, which is described here.

Thank you really much, I did'nt know this macro, which seems unforgivable given what it can do.

I used the list from http://publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/BOOKS/am3u1001/B.1.2

I retrieve BLKSIZE from DCOLLECT and compare it with the list to get the number of records per track then
i can calculate the total of tracks on par with the LISCAT.

Now I investigate the TRKCALC macro, thanks you .