Tim Shoppa wrote:
> Are there any currently executing NTP surveys, like Guyton's (1994),
> Minar's (1999), Mura/Torres (2005)?
>
I'm not aware of any. People often contact me when they think of doing
surveys, so I've heard of several efforts in the past few years. The
Mura/Torres survey is the only one that published something that I can
remember.
As others have commented, it's getting increasingly hard to do the kind
of survey I did. Fewer servers are answering monitoring queries, either
by default configuration and by firewall. And requests are setting off
intrusion alarms; my ISP almost shut me down over a complaint a couple
of months ago. It's still doable, but I have less confidence in the
notion of a complete list of peers. NAT makes it sort of meaningless to
count by IP address anyway.
If anyone's interested in client statistics, I've been recording 1% of
all requests made to my North American pool server for several months
now. I also log the IP address of every single request. Glad to give the
files to anyone doing a study.
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