On Wed, May 03, 2017 at 07:54:00AM -0700, Lizette Koehler wrote: > > Leap year, Leap Second, how is that handled on the new platform? How does > the clock change occur? Is it manual? Is it automatic? Will the > application need to be shut-down when we go back or forward? > Almost any other platform will handle time zones and DST better. z/OS is almost the worst I know. (Well, perhaps z/VM is worse.)
When has leap year been a problem? Well, I had one 17 years ago with an out-of-service software product that crashed because it called 2000-02-29 an invalid date. z/OS shuts down all applications for leap seconds. Would any application have a problem with a 1-second outage? (Shutting down to go forward would seem to aggravate any problem.) Every leap second there are reports of network crashes. Amazon and Google smear the leap second over a several-hour interval to avoid transients. (Different durations; there is no standard.) z/OS might do well to get on board with leap second smearing, but that could be tricky with the TOD/STCK/CVTLSO design. -- gil ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
