[Nml-wg] About modelisation of the network description

[Jeroen van der Ham]

Aaron Brown wrote:
> Evangelos Chaniotakis wrote:
>> Disadvantage: It'll be a bit more cumbersome to look things up - users 
>> won't
>> be able to just look at an id and immediately know stuff about it. But 
>> well, we'll
>> have identifier lookup services and tools for that.
> The issue I have with meaningless, globally-unique names comes in 
> constructing the lookup service. If we have one global lookup service, 
> it's easy. If i want to know about a random id, i lookup the id in that 
> central service to find the authoritative topology service for that 
> element, and then I go look up the element's information there. That 
> centralized lookup service will have tremendous issues scaling, so we'd 
> need to distribute the lookups. Since the IDs are completely random, to 
> do that even somewhat feasibly, we'd have to use a DHT as the lookup 
> service, and no matter what, every element in every domain would need to 
> be in the DHT.

I do not think that a central lookup service will have scaling issues 
for a long time. Even if optical network were to take off like a 
super-sonic rocket, we're talking infrequent requests, with a minimal 
data footprint.

I'm not advocating a central lookup service, but we should have better 
arguments than the simple "it does not scale".

Jeroen.

-- 
             My email address has changed to <vdham at uva.nl>
   (The science has disappeared from my address, but I'm still doing it)