The 'Support Element Operations Guide' GC38-3118-00 for our Multiprise 2000 states on pages 5-59 and 5-60:
"...the CPC TOD clock is synchronized with the support element TOD clock whenever a power-on reset of the CPC is performed." "The support element TOD clock is synchronized to the CPC TOD clock whenever the CPC TOD clock is changed either manually or automatically:.." "At 11:00PM on the support element TOD clock, it is synchronized with the CPC TOD clock..." I suspect your 2066 does something similar. > -----Original Message----- > From: Steven A. Adams [SMTP:[EMAIL PROTECTED] > Sent: Monday, June 02, 2003 10:54 PM > To: [EMAIL PROTECTED] > Subject: Re: Time Sync > > On Mon, 2003-06-02 at 15:35, Richard Troth wrote: > > I note that the zSeries clock is (800, 900, even 9672s) > > is awfully accurate compared to even the newest PCs. > > (Have not compared it to Sun or HP mid-range hardware.) > > I'm talking about watching the drift file NTPD maintains. > > It goes below 1.000 on the mainframe. Not seen that elsewhere. > > > > I mention this because you *might* get some relief > > if you synch the time on your "support element" and then POR. > > Linux guests can run NTPD and stay locked in synch with the network. > > Other zSeries hosts will be off, but by a surprisingly small amount. > > > > Would that be enough for your Java guys? > > I would hope so but that's sometimes hard to tell. They are developing > an application that uses a payment service that is hosted outside of the > agency. This service is running on midrange gear and syncs time through > ntp. The reports are that the time on the payment servers are very close > to our network time and the mainframe is +90 seconds off. Interestingly > enough the support element is in sync with the mainframe and at the last > POR (roughly 3 weeks ago) the difference was only about 20 seconds. > > Being the mainframe novice of the group it seems to me that the clock in > the 2066 is tracking the support element clock (or vice versa). Am I > correct to say that the mainframe time is set from the support element > ONLY at POR, or are there periodic updates between the support element > and the mainframe clock?
