Bind Clustering

[Gordon A. Lang]

This reply is a few months delayed, but this issue is still very important
to me, and I'm hoping you can take a few minutes to help out.

I finally took some time to read through the code, and unfortunately I was
unable to identify where forward target(s) are obtained in the update
forwarding action.  There's a lot of structure to reverse engineer -- too
much for a casual effort.  So perhaps you can tell me where I can find the
pertinent code...  ?

My belief was that somewhere in the code, the SOA record is obtained, and
the MNAME is used as the forward target -- this belief was based on trial
and error observations.

What you suggested is that the update forwarding actually uses the masters
list from the named.conf file for forwarding targets.

I was unable to find clues one way or another.

But another thing about your response that leaves me wondering if I fully
understand your response is that you say it "walks the list of masters
trying each one in turn," and with the word "trying" in there, it suggests
that it walks the list only until the first successful update.  Perhaps I am
incorrectly reading into it, but if you could clarify that point, I would
appreciate it.  ---  I would expect that if the masters list is used, then
ALL masters should always get the updates.

Thanks in advance.

--
Gordon A. Lang

----- Original Message ----- 
From: "Mark Andrews" <marka at isc.org>
To: "Gordon A. Lang" <glang at goalex.com>
Cc: <bind-users at lists.isc.org>
Sent: Friday, April 09, 2010 5:58 PM
Subject: Re: Bind Clustering


>
> In message <A2E77ADF810A44D1B6AA8AB760ABDB80 at CORP.FSROOT.FLAGSTAR.COM>,
> "Gordon
> A. Lang" writes:
>> Regarding my wild idea for synchronizing mulitiple dynamic masters..
>> my idea is flawed.
>>
>> Evidently, the "allow-update-forwarding" only forwards to the MNAME
>> configured in the SOA.  I was thinking it forwarded to the masters
>> configured in the conf file.  Oh well.  I guess we'll just have to
>> wait for ISC to implement multi-master replication.  Anyone know
>> when this might occur?
>
> What makes you say that?   If you look at the implementation it walks
> the list of masters trying each one in turn.
>
>> --
>> Gordon A. Lang
>> _______________________________________________
>> bind-users mailing list
>> bind-users at lists.isc.org
>> https://lists.isc.org/mailman/listinfo/bind-users
> -- 
> Mark Andrews, ISC
> 1 Seymour St., Dundas Valley, NSW 2117, Australia
> PHONE: +61 2 9871 4742                 INTERNET: marka at isc.org
>