On Wed, 11 Jul 2018 11:03:05 -0400, Tony Thigpen wrote: >Using pipelines could require a lot of programming changes. >Historically, programs tend to be designed to process batches, not records. > >Most shops will not have the bodies to do the changes needed. > Many programs process data sequentially and are well suited to using pipes, which merely bypass temporary files and require no other changes.
In ancient, main-storage-constrained environments pipes might actually degrade performance: having multiple programs co-resident caused paging I/O that overwhelmed any benefit of less temp file I/O. SORT is (too) often given as an example of a pipe stage. It can be inappropriate because SORT is quasi-batch: SORT can not write the first record to SORTOUT until it reads the last record from SORTIN. >I like the idea of REXX as a JCL replacement. It can provide a lot >better logic. I don't know that it will make many inroads due to lack of >man-power, but it can be a method to the future. > >One of our staff looked seriously at JOL and rejected it. -- gil ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
