NMC-WG Session 2NMC-WG Session 2

October 28th 2010, OGF 30Jason Zurawski – Internet2Roman Lapacz – PSNC/GÉANT3

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OGF IPR

• Circuit Monitoring• Other Topics

– Advertising Capabilities?– Streaming?– Other?

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Overview

• Idea:– Monitoring dynamic circuit networks

• Approach:– Idea 1: Constant monitoring of the devices – feedback from the

network control software to tie performance metrics to specific circuit lifetimes/locations

– Idea 2: On demand monitoring – tight feedback loop from the network control software to the monitoring

• Requirements:– Use of the same protocols for communication (NMC)– Use of the same protocols for data representation (NM)– Use of the same protocols for topology descriptions (NML)

• First use of NML schemas in production?(!)

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Circuit Monitoring

• Current Status:– Working in the DICE consortium (Dante Internet2 ESnet (Caltech|

Canarie) to define requirements– Architecture:

• pS MDM has a proposal• pS PS has a proposal

• Proposed approaches have some differences, need to find common ground on at least:– Protocols/Data/Topology Descriptions– Role of the Information Services (LS/TS)– “What is important about a circuit”– Descriptors/IDs etc.

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Circuit Monitoring

• Storage– Use the NM formats (of course!)

• Communication– Use NMC protocols (of course!)

• Topology– Use NML (hopefully!)– IDC (OSCARS/ION) Representation of Topology

• ‘close’ to NML, needs upgrades– AutoBAHN representation of topology

• Not really close to NML (very specific use cases)• Internal vs External topo (problems in presenting data in either case)

– What to do?• Could either Circuit System change? Probably not…• Conversions?• Different ways of presenting the data?

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Protocols/Data/Topology

• Both Projects– hLS/gLS Abstraction

• Topology Service– Differs by projects– cNIS

• Not implemented as pS originally• Want to use this to store passwords/configuration information

– pSPS TS• Uses old (*old*) version of NM/NML topology• Simple add/query/delete (like LS)

• Idea– Re-define the roles of LS/TS?

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Role of the TS/LS

• ID(s)– GLIF Style– Other Styles

• Name(s)– Depends on the domain, or fall baclk to ID

• Descriptive Info– Domain specific – should still be able to find/read (with proper

permissions) • Lifetimes – when did we start/end• Components (if applicable)

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What is important about a Circuit?

• See other venues for how to construct … not going to redefine that

• Ideas: – Need to be able to tie an ID to real set of information– Need to be able to get the id of the circuit (and possible circuit

information) from each domain• Use of the same type everywhere?

– Hard – IDC vs AutoBAHN have different types• Different types + Mechanical trasnlation

– Will work, service to do so?– LS? TS? MA?

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IDs

• Main idea: Changing the way that services advertise what they can do to the IS infrastructure

• From the last call:– serviceType needs to be fixed(?)

• Still used, but change the structure of what the types look like• Standards? Still need for backwards compat. for pS Services

– Services should not just have ‘types’, should be advertising capabilities• E.g. I can ‘perform’ measurements of metric ‘x’• Advertise the protocol that a services speaks (e.g. MP protocol)

– Message Types• Advertise the metrics (already done via eventTypes, be consistent

though…)– Role of keywords (tied to data, tied to service, both?)

• Implications of changes?• Next Steps?

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Advertising Capabilities

• Main idea: XML may not be the best medium to transfer large amounts of data. Have an NMC message to set up a streaming exchange?– Attempts from HADES (others?) in the past– Not standard– Proposal: Message sets up the ‘data channel’ specifics between

the parties. Stop/Start messages? External channel is up to the parties or does that need to still be regulated by NMC (probably).

• Ideas/Discussion?

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Streaming

• ?

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Others?

NMC-WG Session 2NMC-WG Session 2October 28th 2010, OGF 30Jason Zurawski – Internet2Roman Lapacz – PSNC/GÉANT3

For more information, visit https://forge.gridforum.org/projects/nmc-wg

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