On Sun, 19 Sep 2021 11:53:18 -0500, Hobart Spitz wrote:
> ...
>Once you have Pipes you don't need or want EXECIO. ...
>
At times the effort of converting existing art outweighs the benefit. And
POSIX
pipes are portable to desktop systems; CMS/TSO Pipelines is not.
> - Pipes can read from or write to either a DD or a dataset. z/OS EXECIO
> can only use a DD.
> - When a dataset is specified, Pipes defaults to OLD when writing. This
> is something that z/OS access methods don't even check. You could still
> accidentally shoot yourself in the foot, but it's not obvious in JCL In
> Pipes to have to explicitly override the default by coding SHR next to the
> dataset name. I don't know why you would want to.
>
Pipes ought also support the SPFEDIT ENQ:
<https://www.ibm.com/docs/en/zos/2.1.0?topic=integrity-member-name-enqueue>
as FTP and NFS do in order to allow safely updating one member of a PDS by one
job while another job processes a different member, and to allow creating
different
members concurenttly, supported by PDSE but not PDS. With "1000s of stages"
a programmer might not easily check for this.
Is there any protection against FANOUT's having downstream stages that
destructively
update the same data sett? Does Pipes do "ENQ RET=HAVE"?
-- gil
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