The UPDAT option of OPEN is fully supported for PDS  and PDSE.

-- 
Shmuel (Seymour J.) Metz
http://mason.gmu.edu/~smetz3
עַם יִשְׂרָאֵל חַי
נֵ֣צַח יִשְׂרָאֵ֔ל לֹ֥א יְשַׁקֵּ֖ר



________________________________________
From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> on behalf of 
Paul Gilmartin <0000042bfe9c879d-dmarc-requ...@listserv.ua.edu>
Sent: Thursday, August 22, 2024 3:18 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: Simple Rexx question

On Thu, 22 Aug 2024 18:33:10 +0000, Billy Ashton  wrote:
> .
>For output:
>to a PDS member with data: BPX was 95% faster 100% of the time (I guess
>there was a lot of work to set the EOF pointer and such)
>    ...
Update-in-place PDS member?  I understand this was done for UADS
to obviate the need for compressing a perpetually open data set.
How?  BLDL; POINT; WRITE?  I'd be surprised if that works for PDSE.

It appears that greater design attention has been paid to the more
recent facility.

--
gil

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