Date: Thu, 24 Sep 2015 15:07:47 +0200 From: Joerg Sonnenberger <joerg@britannica.bec.de> To: freebsd-hackers@freebsd.org, hackers@freebsd.org Subject: Re: What IS the right NTP behaviour ? Message-ID: <20150924130747.GB10913@britannica.bec.de> In-Reply-To: <39337.1442999127@critter.freebsd.dk> References: <39337.1442999127@critter.freebsd.dk>
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On Wed, Sep 23, 2015 at 09:05:27AM +0000, Poul-Henning Kamp wrote: > It is no surprise that people have different expectations of how > timekeeping should behave, and I'm trying to figure out > what Do What I Want is. > > I think I have identified three variations of "DWIW", which I have > named "eCommerce", "SCADA" and "Workstation" I think there is a class of network devices similar to SCADA, where the correct system time is a bonus, highly desirable, but still a bonus. Many entry class switches or routers often come without battery buffered RTC. For those, startup should not wait for NTP to become ready at all. Time drifts beyond a certain limit are better served by just stepping. The primary intention here is to have logfiles that can be correlated. Joerg
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