[GTALUG] Cache DNS issues.

[D. Hugh Redelmeier]

| From: James Knott <james.knott at rogers.com>

| What's your cache time?  A cache will typically hold the data for a
| short time, to keep stale data from propogating.  It might be as short
| as a few minutes.  A cache certainly won't survive a reboot.

I don't know about local policy, but each DNS record has a TTL which
is supposed to limit the time it is cached.  I imagine that these
are generally honoured by a caching server to avoid overloading the other 
servers.