Multi-mastering with dynamic updates

Gary Wallis wgg1970 at
Mon May 17 16:06:13 UTC 2010

Phil Mayers wrote:
> On 17/05/10 16:02, arcan666 at wrote:
>> Hi all,
>> Like a lot of people over the web, I am looking for a clean 
>> multi-master (multi-primary) solution that allow dynamic updates.
> Interesting. What's the use-case for this?

 From my personal experience the most common use of master only NS 
systems is for complex view based setups that need to avoid the xfr 
problems of views to slaves.

Of course there are security issues. These are usually dealt with by 
having at least one (hopefully pristine) hidden master.

>> And like a lot of people over the web, I haven't found anything 
>> interesting.
>> Google hasn't been friendly for now :/
>> I have tried :
>> - bind-dlz over brbd doesn't allow dynamic updates.
>> - rsync the .jnl files needs a rndc reload (it's not clean).
>> - slaughtering virgins for bind's god(s) is a little dirty (well, I 
>> haven't tried this [yet]..).
>> - ...
>> Can someone give me a hint ?

Google for unxsBind (Bind9+ multi name server set and multiple end user 
DNS manager), it does use local per master rndc commands but not rsync, 
instead it uses a different SQL based job queue mechanism for 
replication of master data that scales very well.

> You are presumably aware that you can do "allow-update-forwarding" on 
> slaves and they'll forward UPDATE packets to the master (and presumably 
> then receive NOTIFY and do an IXFR to receive the updated zone)?
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