invalidate cache on cache-only resolver?
Frank Cusack
fcusack at iconnet.net
Sat Aug 7 21:03:56 UTC 1999
Is it possible to invalidate the cache for a zone on a cache-only
resolver?
On a resolver that is master or slave for a zone, I can run
`ndc reload <zone>'.
Anything like this for cache-only?
Or, how about letting cache-only servers listen to NOTIFY messages and
invalidate their cache based on receiving such a message? Yes, there
are security (performance) implications, but something similar to
how NOTIFY works with slaves could happen:
-- master sends NOTIFY to cache-only
-- cache-only sends notify-response to master
-- cache-only requests soa record and checks serial
-- if serial is newer, cache-only invalidates cache for that zone
This would be useful in our environment, if anyone else thinks this is
a useful item I'd be willing to work on a BIND patch. Also a patch
for ndc and BIND that adds an invalidate message.
~frank
--
* I am Pentium of Borg. Division is futile. You will be approximated. *
* PGP ID: C001AA75 -|- fcusack at iconnet.net *
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