Re: [alto] [Cats] DMDTF and CATS Metrics

["[e-mail]" <[e-mail]>]

Hi, Luis

    Many jobs about the management of the cloud or the edge have been done.


    IMHO, the metrics defined in the redfish, rfc7666, Anuket, etc., perhaps can be used directly if for a service, it is considered valuable and reasonable.


    Some personal understanding for discussion. 
    
    The metrics can be used by two entities: the first is the management/control node which can be aware both the computing and network information, and the second is the ingress which can make a on-path decision.


    The management/control node can do the service deployment, and the ingress can do the traffic steering. The service deployment should be the precondition for the CATS.


    For the former, more detailed information is needed, and the information normally should be informed by using some application layer communication methods.


    For the later, perhaps we need to simplify the metrics, and only communicate necessary information into the network to influence the traffic steering.


    Of course, the management/control node can also make a policy about traffic steering considering more detailed information.

Best Regards
Zongpeng Du



[e-mail] & [e-mail]
 
From: LUIS MIGUEL CONTRERAS MURILLO
Date: 2023-04-12 13:25
To: [e-mail]; 'Dean Bogdanovic'
CC: [e-mail]; '[e-mail]'
Subject: Re: [Cats] DMDTF and CATS Metrics
(Adding ALTO in cc since discussion on metrics is also relevant for that WG)
 
Hi Adrian, Dean, 
 
Another reference work we can consider is https://www.rfc-editor.org/rfc/rfc7666.html. This RFC provides several metrics as part of the MIB definition that could be leveraged on.
 
Apart from that, I think we need to look at what current cloud / VI managers provide nowadays in terms of metrics (i.e., OpenStack, Kubernetes, etc) since the metrics that we could handle will be generated most probably for those non-IETF components. So a good exercise to start with would be to check and compare what kind of metrics these kind of sustems provide nowadays, and derive from that a common / abstract set of metrics that could be consumed by both CATS and ALTO.
 
In https://www.ietf.org/archive/id/draft-contreras-alto-service-edge-07.txt there is reference as well to CNTT and Anuket efforts, which probably need to be revisited and updated. 
 
All in all, an exercise of collecting different sources is needed, and from that select relevant metrics for the purposes of ALTO and CATS.
 
Best regards
 
Luis
 
 
De: Cats <[e-mail]> En nombre de Adrian Farrel
Enviado el: viernes, 7 de abril de 2023 20:17
Para: 'Dean Bogdanovic' <[e-mail]>
CC: [e-mail]
Asunto: Re: [Cats] DMDTF and CATS Metrics
 
Ah, thanks Dean.
 
Interesting coincidence of acronyms. 
 
This work does, indeed, look relevant.
 
Cheers,
Adrian
 
From: Dean Bogdanovic <[e-mail]> 
Sent: 07 April 2023 19:01
To: Adrian Farrel <[e-mail]>
Cc: [e-mail]
Subject: Re: DMDTF and CATS Metrics
 
Hi,
 
I was referring to the work that is being done by Redfish and has been presented at IETF 98 by Joe White (https://datatracker.ietf.org/meeting/98/materials/slides-98-rtgwg-yang-device-profile-for-redfish-network-management-draft-wbl-rtgwg-baseline-switch-model-draft-wbl-rtgwg-yang-ci-profile-bkgd-00). This work didn’t continue within the IETF, but Redfish has published and keeps developing and maintaining their data model (https://www.dmtf.org/sites/default/files/standards/documents/DSP0268_2022.2.pdf]. They did lot of compute resource modeling and taking a loot at their work is very useful IMO. DMTF folks know lot about compute, so it might be worth even rekindling the joint work.
 
Dean
 
On Apr 7, 2023, at 12:34 PM, Adrian Farrel <[e-mail]> wrote:
 
Hi all,

In the meeting in Yokohama, Dean Bogdanovic mentioned a presentation from
IETF-98 that might be relevant to our metrics works.

I did some digging and found the presentation by the IEEE 802.3cf - YANG
Data Model Definitions Task Force. The purpose of that work was to migrate
relevant MIB modules to YANG.

The slides for that session are at
https://datatracker.ietf.org/meeting/98/materials/slides-98-netmod-sessa-iee
e-8023cf-yang-data-model-definitions-task-force-00
The presentation is at https://youtu.be/hUSx_Ua3MnY?t=3326 and the presenter
was Rob Wilton who would, I'm sure, be responsive to questions.

I'm not clear how much this is relevant.

Dean, was that the presentation you were referring to?

Cheers,
Adrian


 




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