On Sun, Nov 14, 2010 at 00:32 UTC, Harlan Stenn <st...@ntp.org> wrote:
> Somebody wrote:
>
>> pool in.pool.ntp.org iburst # will likely get 2 national servers
>> # pool 0.in.pool.ntp.org iburst
>> # pool 1.in.pool.ntp.org iburst
>> # pool 2.in.pool.ntp.org iburst
>> # pool 3.in.pool.ntp.org iburst
>
> One should not need to use the {0,1,2,3}. names when using the 'pool'
> directive.
>
> A single "pool FOO.pool.ntp.org iburst" line should be enough.
... assuming you're using 4.2.7. With 4.2.6 or earlier, "pool" spins
up only one association, and uses DNS only at startup. With the new
pool implementation in 4.2.7, each "pool" directive will spin up as
many associations as needed to reach maxclock total associations (pool
prototype associations included). Multiple "pool" directives cause
the associations to spin up faster, and the potential for overshooting
maxclock temporarily is higher. Also, with the new pool code, if a
pool servers stops responding, it will be replaced, re-querying DNS if
needed (if there are no addresses leftover from the last query).
Cheers,
Dave Hart
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