[erlang-questions] Why Amazon EC2 isn't yet a platform for real web applications

Brad Anderson <>
Thu Jun 21 17:37:49 CEST 2007


Joel Reymont wrote:
> Suppose you _do_ use the instances as load balancers _and_ use HTTP
> redirect.
> 
> Won't there be a separate connection to the target instance of your
> choice once the load balancer figures out what the instance is and tells
> the web browser?

It could potentially be set up that way if you had all public IP addresses.  I
just confirmed at ?DAYJOB that we do not have public IP's and all the traffic
flows through our load balancers and the servers pass a private IP back and forth.

> 
> On Jun 21, 2007, at 2:59 PM, Toby DiPasquale wrote:
> 
>> Each instance only gets a fixed bandwidth limit, so they can't
>> effectively be used as load balancers for other instances above
>> whatever is the limit for a single instance (I think its 250Mbit at
>> this point).

This is why I think EC2 is a bit broken.  They gotta be hearing this from the
masses.  Hopefully they have a solution forthcoming.

Toby,

How does your 'A records with multiple IPs' work?  You're using your registrar
as a load balancer?  I guess you don't have much of a chance to manage
affinity, if you need it at all.

Cheers,
BA



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