[ntp:questions] Re: ntpd, boot time, and hot plugging

Richard B. Gilbert rgilbert88 at comcast.net
Thu Feb 3 22:06:05 UTC 2005


Wolfgang S. Rupprecht wrote:

>Brad Knowles <brad at stop.mail-abuse.org> writes:
>  
>
>>	If you want to make that delay shorter, I guess you could
>>package Stratum 1 refclocks with every machine.
>>    
>>
>
>I'd be waiting for minutes if I waited till ntpd decided it had a
>"good enough" estimate of the Motorola Oncore's time.  Ntpd *could*
>have its first time estimate accurate to well under 1ms in half a
>second on average.  The problem is, it won't tell you the time or step
>the system clock until it filters the crap out of the refclock signal.
>
>Ntpd has a hard act to follow.  The old ntpdate program was a near
>ideal solution from the perspective of booting.  It did its job
>quickly and got off the pot.
>
>-wolfgang
>  
>
Since the Motorola driver polls the clock every sixteen seconds and 
since four samples are required, sixty-four seconds should be sufficient!



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