Mainframe, MVS and zOS Discussion

Posted: **Thu Feb 25, 2016 2:42 pm**

Hello all,

Some VSAM files have a primary allocation of 400 cylinders. Secondary of 450 cylinders. When I ran a LISTCAT on these VSAMS, primary extent displayed in LISTCAT, shows 12000 for primary, secondary extents are 6750 tracks which is correct for 450 cylinders. Can someone tell my why this might happen? Datasets are SMS managed.

Thanks

Posted: **Thu Feb 25, 2016 3:11 pm**

could be a consequence of the "EXTENT CONSOLIDATION" process ?
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Mainframe, MVS and zOS Discussion

Confusion on the primary space allocation of VSAM.

Confusion on the primary space allocation of VSAM.

Re: Confusion on the primary space allocation of VSAM.