On Wed, 19 Apr 2023 13:44:39 -0400, David Spiegel <[email protected]> wrote:
>Hi, >I am writing a Rexx Exec (Batch TSO) to build 10,000+ members in a PDS >(FB/159/27984). >The average member size is 900 lines. > >In terms of performance, which method should I use?: >1) ALLOC ... EXECIO DISKW >2) LMOPEN ... LMINIT ... LMPUT >3) Something else >4) Makes no difference > >Thank you in advance > >Regards, >David > You didn't explain much else other than the desire to build the PDS. How important is the actual performance / wall clock time? Is it one off? Will it run daily? Hourly? Every 15 minutes? I would just use whatever method you are most comfortable with depending on that answer. But if you are already using REXX, I don't know why you would then use ISPF services on top of that. When I've done similar things I've used ALLOC / EXECIO. Regards, Mark -- Mark Zelden - Zelden Consulting Services - z/OS, OS/390 and MVS ITIL v3 Foundation Certified mailto:[email protected] Mark's MVS Utilities: http://www.mzelden.com/mvsutil.html ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
