:: Re: [DNG] Devuan Weekly News LX
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Lähettäjä: Rainer Weikusat
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Vastaanottaja: dng
Aihe: Re: [DNG] Devuan Weekly News LX
Nate Bargmann <n0nb@???> writes:
> SD now includes a replacement for running ntp/ntpdate to synchronize
> time so that is being absorbed.


According to information 'from the internet', that's an SNTP client and

    While a full featured NTP server or -client reaches a very high
    level of accuracy and avoids abrupt timesteps as much as
    possible by using different mathematical and statistical methods
    and smooth clock speed adjustments, SNTP can only be recommended
    for simple applications, where the requirements for accuracy and
    reliability are not too demanding.


    By disregarding drift values and using simplified ways of system
    clock adjustment methods (often simple time stepping), SNTP
    archieves only a low quality time synchronization when compared
    with a full NTP implementation.


        https://www.meinbergglobal.com/english/faq/faq_37.htm


This then (finally!) achieves something certain people have been pushing
for for a long time, namely, it renders the 'wallclock' useless for
sychronizing operations of distributed systems by turning it into a PRNG
(which may randomly jump backward and forward according to the whims of
the SNTP implementation).