IIRC provided you do NOT update the common zones dynamically, you can share the files. This is a dirty solution, the risk is that on e view may change a file and the other views using it will be out of sync.
On 10/01/13 0:34, Kevin Darcy wrote: > On 1/9/2013 10:57 AM, Carl Byington wrote: >> -----BEGIN PGP SIGNED MESSAGE----- >> Hash: SHA1 >> >> On Wed, 2013-01-09 at 14:37 +0200, Jan Gutter wrote: >>> So, here's my question: is there a way to share zones between views to >>> conserve memory? >> One way is to put the master copy of those large zones in one view, then >> define those zones in the other views as type 'forward', forwarding to >> localhost. > Yeah, I've done that before, but it has some undesirable caching > behavior, i.e. entries get cached in the view which forwards, so > clients can get responses from data that is not as "fresh" as they > might get if the data were authoritative (assuming NOTIFY is in place, > or some sort of fast replication mechanism). Also, some things care > whether the AA flag is set in responses. > > I've also been told that at least one BIND-based DNS management > system, to which I'm planning to migrate, will divide up the available > memory for named equally, among all of the views defined in the > config. So, if that's true -- and I haven't been able to independently > confirm it -- then there would be a limit to how much memory a given > view can have, regardless of what tricks and/or stratagems one uses. > (I'm hoping it isn't true, since I have some environments where my > named.conf has 5 views defined in it, 2 of which are non-recursive, > and another 1 of which sees an extremely small volume and diversity of > queries, therefore it would be quite painful for the 2 remaining > "real" recursive views to be limited to only 1/5th of the total memory > space apiece). > > - Kevin > _______________________________________________ > Please visit https://lists.isc.org/mailman/listinfo/bind-users to > unsubscribe from this list > > bind-users mailing list > bind-users@lists.isc.org > https://lists.isc.org/mailman/listinfo/bind-users -- Best regards Sten Carlsen No improvements come from shouting: "MALE BOVINE MANURE!!!"
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