Propagating reserves in a shared CPU environment

For a shared CPU environment, you can eliminate DATA PACKER/IMS reserves that are issued against the $$DPICDS and $$DPITBL data sets and propagate them as ENQs with a resource serialization package (like Computer Associates’ MIM, IBM’s GRS, etc.). No modifications to DATA PACKER/IMS are necessary.

The following examples show specifications for MIM and GRS:

• For MIM, use the following specifications for $$DPICDS and $$DPITBL:

        $$DPICDS     GDIF=YES,
        SCOPE=ALL,
        EXEMPT=YES,
        ECMF=YES,
        RPTAFTER=0,
        RPTCYCLE=120,
        TRACE=NONE

• For GRS, the following levels are available:

  • TASK inside a job
  • SYSTEM inside an operating system image

  • SYSTEMS inside multiple operating system images

    Note

    Use SYSTEMS for $$DPICDS and $$DPITBL.

  If you do not have a reserve filtering product and an error occurs during $$DPICDS or $$DPITBL processing using the ISPF interface, a dequeue will not be issued until you press F3 to end the error panel.