Paul Gilmartin wrote: > In a recent note, Curt Thompson said: > > > Date: Wed, 5 Apr 2006 09:40:27 -0500 > > > > companies are building-out locations that are further apart in > > distances, the latency may prove unacceptable. An example > where this > > may be important is during troubleshooting, where review of > logs, etc > > maybe necessary. If timestamps aren't tightly-coupled, it becomes > > more difficult to piece together the picture that led up to > an issue. > > > But remember the Special Theory of Relativity: If no two > systems are out-of-sync by more than the speed-of-light delay > between them, there can be no problem to "piece together" the > picture in the logs, because no event on either system can > have any effect on the other in less time than that. The > very latency that affects syncronizing the clocks equally > affects the phenomena you're studying, thus alleviating the ambiguity.
Um, yeah, well... Clearly he's talking about delays of at least centiseconds, and probably much more. The speed of light delay around the earth is not much over a tenth of a second, so network and switching delays are what counts here. Tony H. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
