The GDIXMPXT exit routine is called for a resource any time that GDIF needs to evaluate the exemption/conversion status for the resource. Therefore, the GDIXMPXT exit may be called multiple times for the same resource.
The processing in the GDIXMPXT exit routine can take place in the resource requester's address space or in the GRS address space. Therefore, the exit must reside in common storage.
The GDIXMPXT exit routine can influence resource exemption/reserve conversion processing based on criteria such as QNAME, RNAME, job name, VOLSER, etc. You can customize the exemption/conversion actions by setting the appropriate flags in GDIXMPXP parameter list (field XMPX_AFLGS). The GDIXMPXT exit routine should pass a return code value of 4 back to its caller when altering the exemption/conversion actions.
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