z/OS ISPF Planning and Customizing
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ISPF data set integrity enqueue

z/OS ISPF Planning and Customizing
GC19-3623-00

To allow you to update a data set on DASD (EDIT's SAVE, PDF option 3 COPY/MOVE/DELETE/RENAME, TBSAVE, and so on), ISPF issues this macro to protect the entire partitioned data set: 
     RESERVE SPFEDIT,dsname,E,44,SYSTEMS

Also, when writing to a data set on a DASD (COPY/MOVE) that has a RECFM of ‘U’, ISPF serializes with the linkage editor using this macro to protect the entire partitioned data set:

On a shared volume: 
     RESERVE SYSIEWLP,dsname,E,44,SYSTEMS
On a volume that is not shared: 
     ENQ SYSIEWLP,dsname,E,44,SYSTEM
Attention: Do not install SPF and ISPF on the same system. There is a danger of destroying PDSs that are being updated by SPF and ISPF at the same time because SPF uses a different Qname (SPFDSN) than ISPF.
Parent topic: ISPF enqueue processing for data integrity

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