[ntp:questions] Re: sync immediately
Richard B. Gilbert
rgilbert88 at comcast.net
Mon Oct 3 19:13:05 UTC 2005
ibrahim Akyildiz wrote:
>How can i configure my ntp clients for immediately synchronize with ntp server?
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Depending on the version of ntpd that you are running, you may be able
to start it with the -g option. This causes ntpd to set the clock
immediately to something close to the correct time.
If you are using an old version that does not suport -g, consider
upgrading to the current version, V4.2.0 (soon to be V4.2.1). If you
can't upgrade, use ntpdate to set the clock to set the clock before
This is not the same as "synchronizing immediately". Synchronization
from a cold start, even using -g and the "iburst" qualifier on your
server statements in ntp.conf, is a process that takes several hours.
ntpd can gather the information needed to make preliminary settings
within a minute or two. The next few hours will be spent refining
those initial settings until your clock is:
a. ticking at rate that causes it to advance at the rate of one second
per second and,
b. reporting the correct time.
How close you can get to the correct time depends on the quality of the
servers you use and the network that connects you to those servers.
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