[ntp:questions] simple nt.conf cases for ntp-client

Steve Kostecke kostecke at ntp.org
Thu Jan 23 13:54:13 UTC 2014


On 2014-01-23, ardi <peter.knezel at gmail.com> wrote:

> On Thursday, January 23, 2014 12:21:15 PM UTC+1, Marco Marongiu wrote:
>
> [---=| Quote block shrinked by t-prot: 87 lines snipped |=---]

Please quote just enough so that your reply makes sense in context.
Unless you have a very good reason to quote more, a good guideline is
that the amount of quoted matter should be less than the amount of new
matter. If the previous author was long-winded and any direct quote is
too long, write a one- or two-line summary in lieu of a quote.

"Play Nice on Usenet"
http://oakroadsystems.com/genl/unice.htm

"How do I quote correctly in Usenet?"
http://www.netmeister.org/news/learn2quote.html

"Quoting style in newsgroup postings"
http://www.anta.net/misc/nnq/nquote.shtml

"Bottom vs. top posting and quotation style on Usenet"
http://www.cs.tut.fi/~jkorpela/usenet/brox.html

"The advantages of Usenet's quoting conventions"
http://www.mccaughan.org.uk/g/remarks/uquote.html

>> I am not saying that you should use only one server: I am saying that
>> using two is bad, and that you should use four.

[snip]

> Reading: http://www.ntp.org/ntpfaq/NTP-s-algo-real.htm#Q-NTP-ALGO
>
> Two time sources cannot be split into two parties where one has a majority.
> What does this majority means?

A majority is a subset of a set consisting of more than half of the
set's elements.

In the case of a set consisting of two members each of the two possible
subsets consists of one member; exactly half the set. Neither of these
subsets are a majority.

Majority subsets may be extracted from sets consisting of three, or
more, members.

The thread starting at
http://lists.ntp.org/pipermail/questions/2011-January/028289.html
contains some good discussion which may be pertinent to understanding
how NTP finds this majority.

-- 
Steve Kostecke <kostecke at ntp.org>
NTP Public Services Project - http://support.ntp.org/



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