Dear all

 
>proper use of mgmtclas/storclas can save a whole lot of dasd and prevents the 
>need to clean up garbage on a regular basis.  


  Our Situation :Our shop don't have DASD enough(no tapelib) and the 
application programer always allocate very bigger datasets.
 PS and VSAM are almost extended format data sets. 
 We want to 
            1.Release unused and  overallocated space for PS,VSAM and PO by HSM 
or BATCH JCL 
            2.Reduce fewer extents for  PS,VSAM and PO by HSM or BATCH JCL
 What can we do?
 Thanks a lot!

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