[ntp:questions] Quick sync between two computers not connected to the internet

unruh unruh at wormhole.physics.ubc.ca
Tue Mar 23 19:56:33 UTC 2010


On 2010-03-23, Rick Jones <rick.jones2 at hp.com> wrote:
> unruh <unruh at wormhole.physics.ubc.ca> wrote:
>> I am sorry, but getting an authoritative time source is trivial. A
>> GPS18x is cheap ( a lot less than you have spent on your salary in
>> these postings) reliable and easy. If they do not need the
>> microsecond precision of PPS, they can get a serial or usb version
>> and get millisecond precision, which is probably all they need.
>
> Is it still "trivial" in a below-ground data center?  Heck, even a
> data center on the ground floor?  It wasn't a GPS18x, but I tried
> taking a garmin GPS12 into a few machine rooms and had no joy
> whatsoever getting any GPS signal.

Well, you might have to run a line out to the ground floor, or just
stick a $200 laptop with a connection to the data center. That is
slightly less trivial I agree. 

>
> rick jones




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