On Tue, 9 Sep 2025 11:14:00 -0400, Gary Weinhold <[email protected]> wrote:

>the performance system 
>programmers will soon have to be aware that application programmers may 
>introduce multi-tasking in batch job steps and possibly TSO.  

Multi-tasking in batch is not generally a problem. However, Batchpipes 
introduces a new type of multi-tasking where you split workload between 2 jobs 
as 2 different units of work. How do you get both jobs to behave as an enclave?

As for TSO, in the past TSO users would be penalized because of users that 
implemented multi-tasking. Maybe things have changed but thats something 
performance sysprogs must address. 

>Parenthetically, over 20 years ago we worked with a credit card 
>processor who had a production multitasking application under TSO.

You can run a multi-tasking program under TSO but that is not multi-tasking 
TSO. Default TSO does not multi-task.

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