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Re: [RRG] Comments on the Design Goals I-D



I am running late but trying to catch up now.

On Apr 25, 2007, at 10:36 AM, Tony Li wrote:
Hi Heiner,

My Suggestion wrt. 3.1:

Provide an architecture which "abolishes the scalability problem"
Then  you have no problems with catering for 3.2 and 3.3.

Well, the only real way to "abolish" the scalability problem is to insist on solutions that have zero growth. That's not necessarily feasible or a requirement. After all, hardware is getting faster and we can reasonably take advantage of that.

I agree with Tony here.

If I try to state in a more general term, it seems to me that a good scalability solution does not necessarily put some absolute cap on the size of the system, but rather, it should have a control handle on the size, and can effectively adjust the size based on the engineering tradeoffs (which necessarily change over time)

However, even with a zero growth solution for 3.1, it's trivial to imagine a solution for TE that still results in non-scalable growth: for example, generate arbitrary more-specifics, down to the host level.


I mentioned it in Prague: What shall this stretch-philosophy be all about?
Is it to discredit particular solutions ? What is the gain of it ?
Obviously, it cannot discredit a detour per se. The path of a detour is longer than the shortest path -this is well-known by everybody and not a secret.


The purpose of all of these design goals is to help us agree on the criteria that we will use to evaluate various proposals. We are trying to establish the metrics that we will use to judge proposals on, but are also trying to leave open the possibility of using our judgement to make intelligent trade-offs between various metrics. Thus, we are trying to avoid creating arbitrary requirements on those metrics.

Tony


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