Multiple BIND instances
isc at arntzen.us
Tue Feb 7 14:12:15 UTC 2012
On Mon, 2012-02-06 at 23:09 -0800, sasa sasa wrote:
> I got a server with 16GB memory, want to install 2 BIND on CentOS, one cache only and another authoritative.
> Is it better to install 2 OS virtually and run BIND in them or run 2 instances of BIND on the same OS? I mean what is the best practice to take advantage of the hardware resources without risking having single DNS with cache and authoritative?
How many CPU cores do you have?
I've been running Debian with BIND (some with multiple views) on Xen for
a few years now. Each box has five virtual servers, some of them
running >1,000 lookups/second with plenty of CPU overhead.
The boxes are dual hex-core AMDs with 32GB RAM. The individual virtual
servers are running 2 cores each. The boxes have up times of over 600
days with no issues.
I'm not suggesting this is what you should do, but rather showing it has
been a very successful and cost effective solution for me. You should
evaluate the expected DNS load and test accordingly. I tested my servers
with several times our current load before deployment.
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