On Dec 31, 2008, at 15:28, Kevin Oberman wrote:
We use CDMA clocks and last leap second it took weeks for all of the
cell sites to adjust the last one. As a result, I have set all of our
clocks for manual leap second and set them to adjust tonight at
midnight
(UTC).I'll take a look in about 35 minutes and see how it worked.
Chiming in a little late here ...
Over at the NTP Pool we had about 9% of the servers not handle the
leap second accurately; starting at midnight UTC. After an hour (so
between 01:00 and 02:00) it was down to about 3%; a couple hours later
down to about 1% of our servers (a few dozen)[1]. Most of those got
in order within 24-48 hours. Interestingly the few who didn't get
corrected within a few days were, tada: CDMA clocks.
To stay vaguely NANOG on-topic: I believe at least some of our ~1700
NTP servers are routers; so I'm guessing they handled the leap second
alright.
Sounds like a "RISKS" lesson: Don't use side-effects of a tool for
something critical. (If I understand it right then CDMA uses accurate
time because it needs accurate frequency; not because it cares what
time it is).
Also: Who came up with having the leap second on New Year!? Clearly
not someone with any operational experience.
- ask
[1] http://fortytwo.ch/mailman/pipermail/timekeepers/2009/004619.html
and http://fortytwo.ch/mailman/pipermail/timekeepers/2009/004623.html
--
http://develooper.com/ - http://askask.com/
