It's pretty clear that ISPF updates its profiles in place.
At 12/21/2022 03:11 PM, Paul Gilmartin wrote:
On Wed, 21 Dec 2022 09:28:58 -0600, Paul Gorlinsky wrote:
>
> ... I believe IBM's PDS update program shipped with software
distributions had code to update in place;
>
I believe that UADS is (was?) updated by such a technique.
> ... Why else did they come up with PDSEs ( and use VSAM )?
Which I think might have performance issues.
>
Among other things, PDSE supports concurrent update of multiple members.
--
gil
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