On Sat, 27 Jun 2026 13:06:44 +0000, Seymour J Metz <[email protected]> wrote:
>That's certainly the way DISP and ENQ work, and it is appropriate in many >cases, but there is utility in supporting single writer multiple reader >serialization as unix-like systems do. There's also a place for micro >serialization. > "micro serialization" e.g.: while sleep 1; do printf AAAA; date; done >>mylog >>mylog & while sleep 1; do printf ZZZA; date; done >>mylog >>mylog & : >mylog; tail -f mylog ______________________________________ >Fro : Farley, Peter >Sent: Friday, June 26, 2026 1:58 AM > >I would think that a file opened with O_APPEND (same as for DISP=(MOD,…) in >JCL) should be allocated exclusively to the first process where the open >succeeds and that process should keep exclusive control of that file/stream >until it issues a close. All other processes that issue an open for the same >file/stream after the first one succeeds should get an error until the first >process releases control via close. -- gil ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
