BIND9.2.0a2 Source Code

[Vaishali Paithankar]

Firstly, I am sorry for the repetative mails sent by me. This happened
because my earlier mail to the list was bounced back. And I was trying
to send it again.

On Wed, 18 Jul 2001, Kevin Darcy wrote:

> 
> This isn't just a BIND source code issue. You'd have to extend the protocol
> so that the server would send this additional information in a form that the
> clients would understand. And then you'd have to convince all of the server
> and client implementors to adopt the protocol extension.
> 
> Overall, you might be better off using a totally different protocol instead
> of piggybacking on DNS. A Server Performance Metric Protocol or something
> like that...
> 
> About the best you can do _without_ protocol changes is to convince client
> implementors to use SRV records, which send "preference" and
> "weight" information to the clients so that they can make more intelligent
> decisions about what server to use, and how to do failover. But SRV isn't
> truly dynamic. 

To make it dynamic...

How often a DNS loads its zones ?

i.e. if we updated our SRV records frequently, DNS will also have to load
its zones with the same frequency ?

Or can't we load only SRV records or the information that has changed
e.g. only the metrics in the SRV record ?

If you want something dynamic, then you have to go to some
> sort of load-balancing solution. If you look in the archives of this list for
> the last few days, you'll see that we've been arguing about whether these
> load-balancing solutions violate the DNS protocol and/or whether they are a
> good idea or not.
> 
> 
> - Kevin
> 
> Vaishali Paithankar wrote:
> 
> > Hello,
> >
> > I have read about the concepts of DNS but am a new BIND user and
> > just installed BIND9.2.0a2 on one of my Red Hat Linux 7 machines.
> >
> > I wish to try to incorporate some changes in BIND so that it returns
> > metrics of Server (metrics like Server Load, RTT) with the I.P. Address of
> > the Server.
> >
> > This is for the purpose of selection of "best" server by the Client.
> >
> > Which source code files should I go through / change to implement this ?
> >
> > Where can I find some help, documentation of structure of the source
> > code of BIND ?
> >
> > Vaishali
> > --
> 
> 
> 
> 

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