Jason Rabel wrote:
A while back I saw a couple web pages where people graphed various
aspects of their NTP server(s).
One of the graphs of particular importance to me was where they
showed NTP specific inbound & outbound bandwidth.
MRTG data from the server switch port?
For the life of me I can't figure out how they did it though. Are
they fudging the numbers based on 'ntpdc -c iostats' and using the
packets sent / received and multiplying by some arbitrary number of
bytes? Or maybe monitor it via iptables?
Since all normal ntp requests (modulo authentication) are exactly the
same size, you can indeed get a good estimate by simply taking the
number of requests and multiply by the packet size (including all header
overheads). The in/out bandwidth should be pretty much identical.
Thoughts, ideas, suggestions?
See above. :-)
Terje
--
- <Terje.Mathisen at tmsw.no>
"almost all programming can be viewed as an exercise in caching"
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