MERGECOPY uses too many VTS drives at once

Rohn Solecki

MERGECOPY uses too many VTS drives at once
DB2 V7.1 z/OS 1.2

We are doing MERGECOPY using LISTDEF. We have had a contention problem where each job takes as many VTS logical tape drives as it can, so that by the time the 3rd job is running, all of the available tape drives have been taken. This blocks other higher priority jobs.

There is no mention in the Utility manual of a parameter to limit number of parallel processes, like there is in the IMAGE COPY utility. Other than splitting up the single large job into smaller pieces, reducing the number of tables in the MERGECOPY step can anyone suggest a way to limit the number of VTS tapes a job uses (as I write this I realized I'll have to check with our VTS expert and see if there is a VTS option that will help).

TIA
Rohn Solecki

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