[ntp:questions] Confused about pool rotation
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Null at BlackList.Anitech-Systems.invalid
Wed Feb 6 21:38:17 UTC 2013
no-one at no-place.org wrote:
> Yes, I was just reading about that today.
> Eventually my use of SNTP will be integrated into a
> smartphone app and distributed globally.
> So would I get just one vendor zone for both my iPhone
> and my Android version of my app?
Yes, as far as I can tell, only one vendor zone is needed
for all your apps / products,
which would have 4 query addresses,
each returning 4 A records from the pool per query.
0.vendor.pool.ntp.org
1.vendor.pool.ntp.org
2.vendor.pool.ntp.org
3.vendor.pool.ntp.org
BTW, it returns A records for pool servers
that are geographically close to _your_ DNS server.
{Whatever DNS server the phone platform uses
that your app runs on.}
> Also is there any recommended way for me to avoid
> stressing the servers during my development phase?
> I don't want my computer to get blacklisted for abusing
> the servers while I am testing things.
Don't query servers more often than once a minute?
{Actually NTPd uses log2 sec,
so it polls no more often than 2^6 = 64 sec = 1.07min;
then NTPd gradually increases the poll rate up to
2^10 = 1024 sec = 17.07 min},
as the clock discipline stabilizes.}
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