Re: [RRG] NTP and various proposals.

["William Herrin" <bill@herrin.us>]

On Mon, Feb 25, 2008 at 11:46 PM, Tony Li <tli@cisco.com> wrote:
>  On Feb 25, 2008, at 7:11 PM, William Herrin wrote:
>  > When the server is responding well and it's in sync, NTP backs off to
>  > where it sends only a single query every thousand seconds or so.
>  > That's more than enough time for the ITR to expire and remove the
>  > cached ETR entry so that on the next attempt NTP sees: jitter.
>
>  What this simply requires is that the cache be large enough to hold
>  18 minutes worth of correspondents.  This does NOT seem impossible by
>  any means.

Tony,

Plug it in to your favorite map-encap scheme and and factor for the
need to keep the cache entry current and accurate during that 18
minute span of inactivity. Now ask the right question: not is it
possible in general but is it possible for that inactive cache
increase to be cost-effective?

Regards,
Bill Herrin



-- 
William D. Herrin                  herrin@dirtside.com  bill@herrin.us
3005 Crane Dr.                        Web: <http://bill.herrin.us/>
Falls Church, VA 22042-3004

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