If you have the luxury of requiring a zEC12 and z/OS 2.1 (not under z/VM): constrained transaction.
Otherwise, as has been suggested, PLO CSDST(G) In a lot of PLO implementations that I have seen, the "CS" is on a sequence number that is incremented on each relevant operation, then the "stores" are the items that you truly want to serialize. Peter Relson z/OS Core Technology Design ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
