Ask,

My server in The Netherlands is set at 100Mbit since january.
I divided "received packets" by "time since reset" (20 days) from # ntpdc iostats and the result is 27 requests/sec.

This is including the 200-400 req/sec spikes.

Jos.

Op 9 mrt 2009, om 19:08 heeft Ask Bjørn Hansen het volgende geschreven:


On Mar 4, 2009, at 13:02, Arnold Schekkerman wrote:

This particular box is in the US and is set to 50Mbps on 
http://www.pool.ntp.org/manage/servers
-- so it seems to get about 1 query per second "per megabit".
Does that correspond with what others are seeing?

My box in NL, EU is set to 1Mbps and got 685K [1] requests over the
past
15.25 days (iptables ntp match count). That makes 0.5qps/Mbit average.


Any other anecdotal numbers here?  In particular I'd be curious about
the query rates for hosts set to 100 or 1000Mbit.

The aggregate "available mbit" is about 156Gbit, so with 0.5qps/mbit
we're doing about 80k requests a second (or about 7 billion a day).

For comparison, I've been told the NIST servers do 30k a second; so
even if our average really is 0.25qps/mbit then we're definitely
helping. :-)


 - ask

--
http://develooper.com/ - http://askask.com/


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