Yura Pismerov wrote:
>>> Regarding the TTL, Bruce mentioned in his message that we assign TTL
>>> an a per record basis and we believe it is sufficient since the
>>> record based TTL takes precedence in any case.
>>> Let me know if you have further questions.
>>
>> Sure, but this adds undue load on my nameserver, and those of my
>> customers for zones which I know will *never* change.
>>
>> A DNS lookup may only take you a few milliseconds, but when you're
>> running on a CDPD modem, 19.2K/s with 2-4 SECOND latency (typical
>> while roaming off-network), having to wait an extra 15 seconds for a
>> DNS lookup every 5 minutes is a pain.
>>
>> On the other hand, when I'm planning an IP change of some sort which
>> cannot have redundancy on two IPs, I usually set my TTL to 60
>> seconds, that way users experience almost no downtime (a maximum of
>> 60 seconds, so in reality, an average of 30 seconds or less)
>
> Dave, I believe what you are looking for is called (or at least
> could be a part of) Dynamic DNS.
> But we do not offer this service yet.
Nope, just flexible TTLs. I normally like to issue fairly long TTLs (at
least, long compared to 5 minutes) -- But when I know an IP change (or more
likely, a server change -- i.e. a new mail server is coming up to replace a
server) is upcoming then a short TTL can reduce the changeover time to zero.
-- Dave Warren, Email Address: dave.warren@devilsplayground.net Cell: (403) 371-3470 Fax: (403) 371-3471 Toll free: (888) 371-3470 Vonage: (817) 886-0860 ICQ: 17848192 AIM: devilspgd Yahoo!: devilspgd MSN/PASSPORT: dave.warren@devilsplayground.net
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