> -----Original Message-----
> From: IBM Mainframe Discussion List On Behalf Of R.S.
> 
> I dared to get all the objections together combined with some mines:
> 
> Disadvantages:
> 1. New feature - people still think that way <vbg>
> 2. Former requirement for SMS-management
> 3. "New" keyword to create PDSE (DSNTYPE)
> 4. Cross-sysplex sharing
> 5. Cannot hold both data and programs (and no visible clue what's the
kind
> 6. LPALST, LNKLST restrictions
> 7. Quite recent changes (address spaces) - look like "work in
progress"
> 8. PTFs
> 9. With fe exceptions (listed below) no visible advantage. Long names
> are not usable in JCL or ISPF (where they are usable?). Load module
size
> is limit rarely a problem. New program format is not an advantage
itself.
> 10. As above: 64k TRKs limit relieved, but ther's still single vol
> restriction.
> 11. Still many datasets cannot be PDSEs.
> 12. Performance can be worse than PDS.
> 13. Secret documentation. BTW: It is horrible that basic function as
> "get_dataset_size" is kept secret for regular users!
> 14. 4k block boundary for members can consume more space than regular
PDS
> 
> Advantages:
> 1. No need to compress
> 2. 123 extents
> 3. No 64k TRKs limit
> 4. Cannot be destroyed when open for output as PS (common mistake).

5.  Counts as one extent in LNKLST regardless the actual number of
extents.

    -jc-

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