On Wed, 19 Apr 2023 13:44:39 -0400, David Spiegel wrote: > >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 > Performance is likely to be dominated by allocation overhead. It was once reported here that allocating another DDNAME to the same data set *and*leaving*it*allocated* throughout the process improves performance by shortcutting ENQ overhead.
>2) LMOPEN ... LMINIT ... LMPUT > Allocate only once; LM OPEN by DDNAME, not DSN. >3) Something else >4) Makes no difference > What's the source of your data? Isn't there a utility that will create multiple PDS members from a single PS input? -- gil ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
