[ntp:questions] Tiime Sync solution

Adrian 'Dagurashibanipal' von Bidder grazdan at fortytwo.ch
Tue May 31 18:16:27 UTC 2005


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Clinging to sanity, Brad Knowles mumbled in his beard:

> At 1:55 PM +0800 2005-05-30, Eric Liu wrote:
> 
>>    I need to implement time synchronization on LAN. And there should
be 1ms
>>  accuracy.

Hmmm. Eric: Scrap the '10ms or better is pure luck' - I see that my
server is below 5ms offset, with hand-picked off-site servers, this is
over a little used ADSL connection.
 
> relatively slow ADSL line, I'm usually down in the low single-digit 
> *microsecond* region.

You sure?

    remote       refid     st t when poll reach   delay   offset jitter
==========================================================================
+130.60.75.75 130.149.17.8  2 u   85 1024  377   20.503    1.772   0.429
*130.60.75.72 130.149.17.8  2 u   26 1024  377   23.294    2.103   0.415
+130.60.7.44  130.60.7.51   3 u  121 1024  377   19.054   -7.424   0.390
 192.168.1.17 192.168.1.254 4 u   84 1024  377    0.627   -2.502   0.860

(and offset=-1.94 in ntpq -c rv)

I was quite sure that these numbers are ms and not µs - are you really
down at 0.00x here?


greetings
- -- vbi

- -- 
featured link: http://www.pool.ntp.org

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