Re: [Anima] ANIMA when there is a system-wide issue

Brian E Carpenter <brian.e.carpenter@gmail.com> Tue, 01 December 2020 02:37 UTC

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To: Michael Richardson <mcr+ietf@sandelman.ca>
Cc: Anima WG <anima@ietf.org>
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From: Brian E Carpenter <brian.e.carpenter@gmail.com>
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Date: Tue, 1 Dec 2020 15:37:06 +1300
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Subject: Re: [Anima] ANIMA when there is a system-wide issue
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On 01-Dec-20 12:36, Michael Richardson wrote:
> 
> Brian E Carpenter <brian.e.carpenter@gmail.com> wrote:
>     > Perhaps there is something we should specify in ANIMA to prevent the
>     > ANIMA infrastructure falling into this sort of trap: when there is a
>     > system-wide issue (such as hitting an O/S resource limit everywhere at
>     > the same time) it also prevents the autonomic mechanisms from working.
> 
> I think you mean, that it should not also prevent the autonomic system?
> I think that key is:
>   1) allocate resources (including threads) up-front
>   2) do not dynamically allocate threads per interface, but rather use async
>     routines.
> 
> But, I don't know what we could write into the specification to make this
> happen.  It seems that we really just need smart implementers.

I think the IETF could do better on "Implementation Considerations" in
general. For now, I'll make a note to add something in the "Robustness"
section of the ASA Guidelines document.

Regards
   Brian