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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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