Re: Extracting stats from BIND XML stats file : issues

[Phil Mayers]

On 13/01/2016 19:38, blrmaani wrote:


Here is the issue:
I am sending approx 200 'A' queries to the DNS server and my above calculation 
is showing a value of 2 queries-per-second.


Does the XML value you're looking at measure outbound or inbound 
queries, and are the queries you're sending being served from cache, 
being recursed, or served from authoritative zones?


Which statistics version is this? On bind 9.10 the:

statistics/server/counters[type="opcode"]/counter[name="QUERY"]
statistics/server/counters[type="nsstat"]/counter[name="Request*"]

...give expected and agreeing values for me.
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Re: Newbie's BIND Questions on DNSSEC, HA and SD

[Tony Finch]

David Li  wrote:
>
> Another question I haven't quite figured out is the HA architecture.
> Is it possible to set up a cluster of BIND servers (> 2) for each VLAN
> subnet with one of them as master the rest as slaves?

Are these recursive or authoritative servers?

For recursive servers you only need a few per site. (Per VLAN would be
overkill unless your VLANs are very busy) The standard HA technique
is to use anycast - see for example
http://www.bortzmeyer.org/files/afrinic-dns-anycast.pdf
https://strobe.uwaterloo.ca/watitis/resources/2009/AnyCast%20DNS/AnyDNS.ppt

Where I work our core server network spans multiple sites at layer 2, so
I'm using keepalived which makes the coupling between the DNS servers and
the network a lot simpler.

For authoritative DNA HA, make your recursive servers authoritative for
your local zones, so your recursive servers still work when the rest of
your DNS is broken. Get third-party off-site secondary DNS service.
There's not much need to get more complicated than that.

Tony.
-- 
f.anthony.n.finch    http://dotat.at/
Viking, North Utsire, South Utsire, Forties: Cyclonic becoming northerly 4 or
5, occasionally 6 in South Utsire and Forties. Slight or moderate, becoming
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