REMINDER: LEAP SECOND

shawn wilson ag4ve.us at gmail.com
Tue Jun 23 17:23:04 UTC 2015


On Jun 23, 2015 6:26 AM, "Nick Hilliard" <nick at foobar.org> wrote:
>

>
> Blocking NTP at the NTP edge will probably work fine for most situations.
> Bear in mind that your NTP edge is not necessarily the same as your
network
> edge.  E.g. you might have internal GPS / radio sources which could
> unexpectedly inject the leap second.  The larger the network, the more
> likely this is to happen.  Most organisations have network fossils and ntp
> is an excellent source of these.  I.e. systems which work away for years
> without any problems before one day accidentally triggering meltdown
> because some developer didn't understand the subtleties of clock
monotonicity.
>

NTP causes jumps - not skews, right?



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