easy to understand definitions

Barry Margolin barmar at alum.mit.edu
Thu Mar 24 01:35:14 UTC 2005

In article <d1s41h$1985$1 at sf1.isc.org>, Bob Lockie <bjlockie at lockie.ca> 

> I don't understand "expire" and "refresh", it would seem that "expire" 
> should always be equal to the "refresh" time"?

That would effectively negate the value of having slave servers.  The 
point of multiple servers is fault-tolerance.  You want the slaves to 
continue serving the zone when the master has failed, don't you?  If you 
set Expire == Refresh, then when the slave checks whether a zone 
transfer is needed, and doesn't get an answer from the master, it will 
stop answering for the zone, and you'll have *no* servers responding.

Barry Margolin, barmar at alum.mit.edu
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***

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