no. of Views and Zones

Chris Buxton chris.p.buxton at
Mon Nov 8 17:31:57 UTC 2010

Lightner, Jeff wrote:
> You would NOT use a single zone for this.   Views are designed
> specifically to control what is seen.  However, that control is mainly
> done by acl's specifying which networks access which views.

Or by server IP. You can use match-destinations with views to provide a 
different virtual server per server IP address, all on one box, with a 
single instance of named. You can even combine match-destinations, 
match-clients, and match-recursive-only together to satisfy even more 
complex scenarios.

That said, if it were me, I'd run separate boxes, separate VM's, or at 
least separate instances of named (each attached to a different IP) in 
the scenario posed by the OP.

> Do you
> assign specific subnets to each client?  If so you could do this with
> views but processing needed to load dozens of views is not something I
> can comment on as I think most people only do a couple.   (Here we do
> only internal and external to differentiate what people on the internet
> see as opposed to what people on our intranet see.)

I also don't have any empirical data, but I do expect that setting up 
thousands of views would have a significant impact on performance — each 
query runs a gantlet of match-* ACL's before finding the correct view.

Chris Buxton
BlueCat Networks

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