bind round robin

[Dominic Marks]

 From the original message:

[1]
>>>>
>>>> www        IN A   10.10.10.10
>>>> www        IN A   192.168.0.10
>>>>

> 
> From pen homepage:
> 
> "This is pen, a load balancer for "simple" tcp based protocols such as http or 
> smtp."
> 
> As I know DNS uses both tcp and udp protocols.

 From the posters excerpt it looks like they are looking to load balance 
HTTP. [1]

> For failover you can try OpenBSD Packet Filter with CARP protocol. PF can do 
> load-balacing using different algorithms also. CARP is ported to FreeBSD. 
> More info on: http://pf4freebsd.love2party.net/carp.html

Also true. Last time I looked at this however there was a big disclaimer 
saying that
CARP's load balancing was likely to give a distorted distribution of 
load and I don't
believe it does weighting. I believe this would also be a problem 
considering the
example in [1]:

 From carp(4):

      Note: ARP balancing only works on the local network segment.  It 
cannot
      balance traffic that crosses a router, because the router itself will
      always be balanced to the same virtual host.

Cheers,
Dominic