On 7/14/06, Ask Bjørn Hansen <[EMAIL PROTECTED]> wrote:
I had been a little concerned if all the servers behind DSL were "bad" for
the pool, but now I am convinced they are fine (as long as they are not
overloaded).
Well, the transmit time difference of an NTP packet on a 3000/768 DSL
line is just about 0.5 ms. Not an issue at all for in internet pool
server.
But there are cable providers that have extremely asymmetric lines;
I've seen 6000/128 advertised. That would result in a 4.5 ms transmit
time difference, which I assume means a 4.5 ms systemic offset. That's
still probably not a large issue for lower stratum pool servers, but
it would definintely be a concern for many other NTP applications.
There exist fixed wireless ISPs with even *lower* upstream bandwidth.
Should there be some "rule of thumb" concerning upstream bandwidth?
Perhaps the pages should suggest at least 384 kbps to qualify for the
pool (which would mean a systemic offset of ~1 ms)?
--
RPM
=========================
All problems can be solved by diplomacy, but violence and treachery
are equally effective, and more fun.
-Anonymous
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