RE: positive and negative dns values

Duane thanks for the response.

Just to clarify it a bit more. I gather you are saying that squid will
continue to timeout for a site which has changed it's IP address until the
positive_dns_ttl expires.

So to 'switch' between IP addresses faster I either have to apply the "True
DNS TTL fix" or reduce the 'positive_dns_ttl' to a lower value.

Can any of the other _dns_ parameters be used to assist in the transition ?

Regards
Mark.

>
> If a server is successfully running and connecting to a host on a
> particular IP address (eg 1.1.1.1) and the address changes to 1.1.1.2
does
> the negative_dns_ttl tag force the cache to reexamine the IP address after
> it's cache expiry or does the IP address remain in Squid's ip cache until
> the positive_dns_ttl expires ?

In your example, its the positive_dns_ttl. For a successful lookup,
the answer is used for 'positive_dns_ttl' seconds without making
another lookup.

Duane W.
Received on Thu Mar 30 2000 - 20:01:28 MST