Re: [IBM External] Re: The Business Case for BatchPipes in the z/OS Base (was: ... Pipes ...)

[Paul Gilmartin]

On Wed, 29 Sep 2021 06:54:09 +, Martin Packer wrote:
>
>Between steps can't be pipes, can be VIO. Between jobs can be pipes, can't
>be VIO.
>
Pipes could work between steps if the PIPE SUBSYS has an implied ELASTIC
stage.  But that's just reinventing VIO.  PIPE SUBSYS must do some buffering
to handle BSAM RECFM=VB.  Or does it require that RECFM and BLKSIZE
or the producer and consumer be identical?

>That second sentence depends on the ability to schedule two jobs (possibly
>originally steps of the same job) alongside each other.
>
Alas, the Initiator won't do the latter for you.

-- gil

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Re: [IBM External] Re: The Business Case for BatchPipes in the z/OS Base (was: ... Pipes ...)

[Martin Packer]

Between steps can't be pipes, can be VIO. Between jobs can be pipes, can't
be VIO.

That second sentence depends on the ability to schedule two jobs (possibly
originally steps of the same job) alongside each other.

Fun stuff but / and somewhat complex - which is what inspired me to start
writing what would become SG24-2557 Parallel Sysplex Batch Performance in
late 1990. :-)

I did a lot of presenting on Pipes to individual customers and conferences
in the 1990s. It would be fun to do it again... :-)

Cheers, Martin

Sent from my iPad

> On 29 Sep 2021, at 05:23, Paul Gilmartin
<000433f07816-dmarc-requ...@listserv.ua.edu> wrote:
>
> On Mon, 27 Sep 2021 11:39:17 -0500, Hobart Spitz wrote:
>>
>> Intra-JOB pipe - This would be similar to VIO; it doesn't exist
otherwise.
>> I think it would be a great feature.
>>
> Between steps?  One might just as well use VIO.
>
> -- gil
>
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