> Pray tell what authority you have for this pronouncement ? I am totally confused where you got this idea that most of the worlds servers tick over in sync, like a "We Will Rock You" resitation at Wembly stadium. In fact it is more like the applause at the end of a football game.
On my desk are about five computers. All of their clocks say a different thing and they all work just fine together. I have a Mac, PC, Sun, and two Linux boxes. At the ISP I consult for there are about 20 servers serving 60,000 customers. Their clocks routinely go out of sync and it doesn't affect service. At my previous job at Telkom there were hundreds of server machines serving 20,000,000 customers. Very few of them were NTP synced. Why? because NTP was blocked by the over-zealous firewall admins. When I came to work for my present company (which provides most of the worlds telecom equipment) the same thing was true: all our software works fine with local BIOS clock: it's specified in our ops manual that NTP is merely "recommended". Finally, because NTP can easily be spoofed, many admins explicitly DISABLE it fearing the consequence of one's server time suddenly reading 1970-01-01 or something wierd. Even THAT doesn't necessarily cause an outage. Yes I have not forgotten the examples you mentioned: the factory that stops ops on 31 June, and "other" client of yours that you can't say anything about for fear of being arrested like Julian Assange. -paul On Fri, 2010-12-10 at 19:01 +0000, Poul-Henning Kamp wrote: > In message > <2116222274-1292007095-cardhu_decombobulator_blackberry.rim.net-4042 > [email protected]>, [email protected] writes: > > > >> very much need to know and agree what time it is. > > > >Yes but mostly only to an accuracy of minutes. > > Pray tell what authority you have for this pronouncement ? >
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