As most people would know, changing the TOD clock on a mainframe is fraught with difficulties. z/OS uses TOD timestamps all over the place to manage change and consistency, not the least being LRSN's for DB2 and IMS logging. Changing the TOD clock forward in time can cause problems, changing it backward in time is absolutely forbidden.
So switching the TOD clock from local time to GMT for any CEC east of Greenwich requires moving the TOD clock backwards. So, for many years, IBM's standard advice for Australian sites was to take a 10-hour sysplex-wide outage. Understandably, most sites continued with a TOD clock set to local time. A few years ago (z14 announcement??), IBM announced a new PR/SM feature which would decrement the TOD clock 1 second at a time, while simultaneously incrementing the timezone offset. Can anyone shine any light on this feature? I've searched through the HMC manuals without any luck - a pointer to documentation would be greatly appreciated. Matthew ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
