SOA minimum

[Igor Podlesny]

> At 4:15 PM +0700 5/22/01, Igor Podlesny wrote:

>>        My  question  is about SOA minimum field -- more precisely about
>>        it's  meaning.  Reading  appropriate  RFCs I found out, that the
>>        third  and  the  last  at the moment meaning is TTL for negative
>>        response caching.

>         This is correct.  What used to be called the "Minimum TTL" within 
> the SOA record is now used as a "Negative TTL", and the minimum TTL 
> for the zone is set outside of the SOA, typically with a "$TTL" 
> directive.

>>        If  I  have  got  it correct it would be reasonable then to have
>>        MINIMUM really low, and use adequate $TTL instead.

>         You don't want to set the SOA "Minimum TTL" too low, because you 
> do want nameservers around the world to cache for a reasonable amount 
> of time the NXDOMAIN answers that your nameserver(s) hand out. 
> Otherwise, this just unnecessarily increases the load on your 
> nameserver(s).

>         I would say that anything between five minutes and an hour would 
> probably be a reasonable value for this number, depending on your 
> exact circumstances, etc....

`low' said by me was instead of the same values you suggests :)

thank you for thoughts sharing ;)

-- 
 Igor                            mailto:subscr at morning.ru