[ntp:questions] NTP server Dimensioning process

Martin Burnicki martin.burnicki at meinberg.de
Fri Dec 21 08:42:52 UTC 2007


T Manikandan-Q3926C wrote:
> Can anyone brief how will be the dimensioning process for the NTP server
> in the following scenario?
> 
> NTP to be implemented on the Server running RHEL [Red hat Enterprise
> Linux]
> To handle at least 100000 clients in a network.
> 
> How the RAM, CPU and the HDD need to be dimensioned?

If the clients are running the reference implementation of ntpd then every
single client will send maximum 1 request every 64 seconds, i.e. 100000
client produce a mean load of 100000/64~1560 req/s.

Even a AMD Geode CPU running at 500 MHz with 128 MB RAM here can handle more
than 15000 req/sec, i.e. 10 times as much as you need. The relevant HDD
space you need for ntpd depends only on the amount of log files you want to
keep, e.g. the loopstats file and its history.

Martin
-- 
Martin Burnicki

Meinberg Funkuhren
Bad Pyrmont
Germany




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