[ntp:questions] USNO Washingon NTP servers down July 28-29, 2007

Wolfgang S. Rupprecht wolfgang.rupprecht+gnus200707 at gmail.com
Fri Jul 20 01:24:46 UTC 2007

"David L. Mills" <mills at udel.edu> writes:
> This suggests there are almost 5000 cronjobs running once per hour
> on the same minute, rather a dismal practice.

Maybe stock ntpdate and SNTP cohorts could add a random number of
seconds to wait if it looks like they are being run near "even" times
(such as on the hour or perhaps half hour).  Maybe the abusers will
pick up that code and have their load peaks diffused a bit.

It is amazing how much extra network traffic one sees at
round-numbered times.  Cron makes it far too easy for folks to bunch
up requests at the same time.

Wolfgang S. Rupprecht                http://www.wsrcc.com/wolfgang/
IPv6 on Fedora 7

More information about the questions mailing list