On 08/10/2010 04:30 AM, Miroslav Lichvar wrote:
Hi,
I'm considering adding iburst to the pool.ntp.org servers specified in
default ntp.conf in Fedora and RHEL distributions.
Would that be acceptable?
I believe iburst is the preferred way to do NTP. I personally set all my
servers that way, and would have no problem with you doing that globally
for Fedora/Redhat.
On the vendors page there is a note that there should be at most 4-5
queries per hour. But ntpd with default minpoll and maxpoll intervals
makes about 43-57 queries in the first hour, so I'd expect adding
iburst will have only a minimal effect on an average server load.
I think that's a guideline for people trying to implement NTP in routers
and other hardware. Fedora/Redhat uses ntpd which already has all the
intelligence you need. I wouldn't worry about that section, as I don't
think it applies to your case.
Also, the example on the usage page has four servers specified and
later the document says to not use more than three servers.
That may need to be updated. I use five servers in all my NTP servers.
With the amount of servers in the pool, I don't see this would add any
significant load. Three is certainly sufficient, but five will make you
very robust timing wise.
--
Scott Baker - Canby Telcom
System Administrator - RHCE - 503.266.8253
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