Hi Al,
see below.
On 10.06.2016 18:41, MORTON, ALFRED C (AL) wrote:
Hi, see below,
-----Original Message-----
From: Mirja Kühlewind [mailto:i...@kuehlewind.net]
Sent: Friday, June 10, 2016 9:15 AM
To: Benoit Claise; MORTON, ALFRED C (AL)
Cc: w...@mti-systems.com; aqm-cha...@ietf.org; The IESG; draft-ietf-aqm-
eval-guideli...@ietf.org; Schulthess Nicolas (F&W); aqm@ietf.org
Subject: Re: [aqm] Benoit Claise's Discuss on draft-ietf-aqm-eval-
guidelines-11: (with DISCUSS and COMMENT)
Benoit,
waiting for Al. But in the mean time see below.
On 10.06.2016 11:57, Benoit Claise wrote:
Al, assuming that someone would like to register this metric in a
registry
(RFC6390), are they any grey areas in the performance metric
definitions in
the draft?
From what I understand, a point such this one (from Al) is:
Because we are using Goodput, G, I take as given that there
must be a protocol with retransmission capability.
Otherwise, further simplification is possible (with dummy
traffic).
Not really if you have not retransmission, simply your
goodout=throughput.
Don't see a problem here.
[ACM]
Although Goodput == Throughput for UDP, you can make a
simpler measurement, you don't have to check for uniqueness.
That's the view from someone measuring in the network. But if you do
simulations or have a controlled testbed, the easiest things is to measure in
the application (and you automatically get the right thing). As we don't know
what exactly people do in the end, I think it is right to leave this open
(and leave it as simple as possible in the description text).
But yes, Fs and G need to be reported on payload
at the same layer, so the protocol layer chosen is
an input parameter for this metric.
Yes, it need to be the same layer for all your tests; but the goal is
not be
compatible with other tests. So it's your decision. It's guidance how
you
would test AQMs to decide if you want to deploy them in the future (or
to
show that your AQM has benefits compared to other AQMs such that another
guy
might deploy this in future).
[ACM]
The current text mentions the "application layer" but needs to add the note
that the layer chosen needs to be specified/included in with the results, so
that
someone reading results later will know what was tested.
There actually is now a sentence saying:
"Where flow size is the size of the application-level flow in bits and
goodput is the application-level transfer time (described in
Section 2.5)."
Is this sufficient?
Mirja
Al
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