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Re: [core] Suresh Krishnan's No Objection on draft-ietf-core-too-many-reqs-05: (with COMMENT)

Ari Keränen <ari.keranen@ericsson.com> Thu, 01 November 2018 00:50 UTC

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From: Ari Keränen <ari.keranen@ericsson.com>
To: Suresh Krishnan <suresh@kaloom.com>, "core@ietf.org" <core@ietf.org>
CC: The IESG <iesg@ietf.org>, "draft-ietf-core-too-many-reqs@ietf.org" <draft-ietf-core-too-many-reqs@ietf.org>, Carsten Bormann <cabo@tzi.org>, "core-chairs@ietf.org" <core-chairs@ietf.org>
Thread-Topic: Suresh Krishnan's No Objection on draft-ietf-core-too-many-reqs-05: (with COMMENT)
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Date: Thu, 01 Nov 2018 00:50:10 +0000
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Subject: Re: [core] Suresh Krishnan's No Objection on draft-ietf-core-too-many-reqs-05: (with COMMENT)
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Thank you for the review Suresh! Please see inline.

Also one question regarding proxy behavior also for the CoRE list below.

> On 25 Oct 2018, at 6.31, Suresh Krishnan <suresh@kaloom.com> wrote:
[...]
> ----------------------------------------------------------------------
> COMMENT:
> ----------------------------------------------------------------------
> 
> * Section 3
> 
> If the server is maintaining state per clients for the Max-Age, does the timer
> get reset if a repeat request comes in before the timer expires?

This would be up to the implementation (and deployment) to decide. For example, if it takes a constant time for the server to recover independent of the new requests, not reseting makes sense. OTOH, if even the un-served requests push back the time to recover, or the server has new information on the situation, doing an adjustment could be the right choice.

But overall keeping per-client state is not necessarily a good idea as mentioned in the draft.

> * Section 4
> 
> I think it could be useful to recommend some behavior for the proxies as well,
> in order to avoid a specific client being starved by other clients on a proxy.

I’m not sure if the proxies can do much for this. And if they can, probably it would be something more generic than just for this response code and hence better suited for the new “clarifications and corrections” draft in CoRE.

Does anyone have good ideas what could be recommended on this?


Cheers,
Ari

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