Quoting Rob Janssen <[email protected]>:
Dan Drown wrote:
The Shanghai local clock isn't as good because of jitter reaching
its other upstreams. But this NTP server in China is a much better
source of time than the other choices.
I think this should illustrate why local time service in China is
important, and has special needs compared to other regions. Please
let me know if I forgot to include any details.
Is it really so difficult to find an ISP in China that will host a
(few) dozen of VMs running NTP, with a couple of them having GPS
reference?
(or some reference systems located external to the datacenter used
by those systems as a reference clock with small jitter)
I know from experience that it is difficult to contact a Chinese
ISP, but for locals like Peng Yong this is probably much less of a
problem.
While having more sources in China is nice, that doesn't help the
problem that monitoring external to China sees packet loss and will
likely continue to see packet loss. This thread started with a
volunteer NTP server having a lower score in the NTP pool than it
should. Any other sources inside China can't be used as efficiently
because of this.
As to why this is, I suspect this has something to do with it:
"An important characteristic of the Chinese internet is that online
access routes are owned by the PRC government, and private enterprises
and individuals can only rent bandwidth from the state." -
https://en.wikipedia.org/wiki/Internet_in_China#Structure
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