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Groups > comp.lang.java.programmer > #37508
| Newsgroups | comp.lang.java.programmer |
|---|---|
| Date | 2017-09-28 10:52 -0700 |
| References | <oqbp1u$947$1@dont-email.me> <oqe5l2$20l$1@gwaiyur.mb-net.net> <oqeo01$re4$1@dont-email.me> |
| Message-ID | <449f52c8-93c8-4418-b127-2acd7141fad0@googlegroups.com> (permalink) |
| Subject | Re: Is time an illusion? |
| From | lewbloch@gmail.com |
On Tuesday, September 26, 2017 at 4:31:29 PM UTC-7, Daniele Futtorovic wrote: > On 2017-09-26 20:18, Marcel Mueller wrote: > > On 25.09.17 22.30, Daniele Futtorovic wrote: > >> I'm trying to synchronise a process between two machines (actual, not > >> virtual). I require sub-millisecond precision. > > > > What is the distance between these two machines? > > > > If they are far away there is not even a physical definition of the term > > "the same time" within the required precision. The theory of relativity > > prohibits this. The maximum theoretical distance for let's say 0,1ms is > > 30km. > > However, you can still make more precise assumptions about time > > differences under certain conditions. > > The problem space can be, at least as a working assumption, restricted > to a LAN. LANs have latency. Latency kills synchronization. LAN latency is largely unpredictable, especially with Ethernet with it's "Fail? Abort, Retry" protocol. -- Lew
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Is time an illusion? Daniele Futtorovic <da.futt.news@laposte.net> - 2017-09-25 22:30 +0200
Re: Is time an illusion? Eric Sosman <esosman@comcast-dot-net.invalid> - 2017-09-25 18:02 -0400
Re: Is time an illusion? Daniele Futtorovic <da.futt.news@laposte.net> - 2017-09-26 00:16 +0200
Re: Is time an illusion? Jerry Stuckle <jstucklex@attglobal.net> - 2017-09-25 19:18 -0400
Re: Is time an illusion? Eric Sosman <esosman@comcast-dot-net.invalid> - 2017-09-26 15:37 -0400
Re: Is time an illusion? Daniele Futtorovic <da.futt.news@laposte.net> - 2017-09-27 01:13 +0200
Re: Is time an illusion? Jerry Stuckle <jstucklex@attglobal.net> - 2017-09-26 21:00 -0400
Re: Is time an illusion? Daniele Futtorovic <da.futt.news@laposte.net> - 2017-09-27 04:26 +0200
Re: Is time an illusion? Jerry Stuckle <jstucklex@attglobal.net> - 2017-09-26 23:32 -0400
Re: Is time an illusion? Daniele Futtorovic <da.futt.news@laposte.net> - 2017-09-28 10:58 +0200
Re: Is time an illusion? Jerry Stuckle <jstucklex@attglobal.net> - 2017-09-28 12:50 -0400
Re: Is time an illusion? Eric Douglas <e.d.programmer@gmail.com> - 2017-09-27 05:25 -0700
Re: Is time an illusion? Arne Vajhøj <arne@vajhoej.dk> - 2017-09-30 22:57 -0400
Re: Is time an illusion? Arne Vajhøj <arne@vajhoej.dk> - 2017-09-25 20:22 -0400
Re: Is time an illusion? Marcel Mueller <news.5.maazl@spamgourmet.org> - 2017-09-26 20:18 +0200
Re: Is time an illusion? Daniele Futtorovic <da.futt.news@laposte.net> - 2017-09-27 01:30 +0200
Re: Is time an illusion? lewbloch@gmail.com - 2017-09-28 10:52 -0700
Re: Is time an illusion? Eric Douglas <e.d.programmer@gmail.com> - 2017-09-26 12:59 -0700
Re: Is time an illusion? Daniele Futtorovic <da.futt.news@laposte.net> - 2017-09-27 01:42 +0200
Re: Is time an illusion? lewbloch@gmail.com - 2017-09-28 10:49 -0700
Re: Is time an illusion? Robert Klemme <shortcutter@googlemail.com> - 2017-09-28 22:33 +0200
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