[LEAPSECS] Schedule for success

Poul-Henning Kamp phk at phk.freebsd.dk
Sun Dec 21 15:10:54 EST 2008

In message <m3prjlxz5z.fsf at lugabout.jhcloos.org>, James Cloos writes:

>>>>>> "Warner" == M Warner Losh <imp at bsdimp.com> writes:


>Warner> You are under the fundamental misimpression that all systems are

>Warner> or can be upgraded every 6 months. That simply isn't possible

>Warner> for a large class of systems.


>But how many of the systems which do not have such a regular update

>procedure in place care about time?

Everything relating to the power-grid load/supply distribution,
that means control of power-plants, transformers and switching
stations. (The "supergrids" people dream about will require better
than 6msec autonomous holdover time precision for 24+hours at all
control points).

Everything relating to modern train control and management.

Everything relating to air traffic control.

Shiping control systems in narrow corridors (The Channel, The Great
Belt etc.)

Military early warning systems.


Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.

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