replicate a whole master

[Mukund Sivaraman]

On Mon, Sep 19, 2016 at 04:40:17PM +0100, Tony Finch wrote:
> /dev/rob0 <rob0 at gmx.co.uk> wrote:
> >
> > If you're thinking that you can do this replication to improve DNS
> > performance, you're right, it will do that.  But it certainly will
> > not scale (if it's even possible to get axfr/ixfr), and it won't
> > handle modern CDN systems properly.
> 
> BIND 9.10 and later will keep popular domains in the cache by prefetching
> them if they are looked up shortly before they will expire. So trying to
> keep local copies of popular zones is less helpful than it used to be.
> 
> (Unfortunately the prefetch option isn't mentioned in the HISTORY file so
> I had to dig through the CHANGES to remind myself when it was introduced!)

There's an attempt to make it go one step further by refreshing whole
zones in the cache:

https://github.com/muks/dnsrefresh

It needs another section to be completed before upload, possibly in time
for IETF-97.

		Mukund
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