1. © 2006 Open Grid Forum Network Measurements Working Group Chairs:Eric Boyd Richard Hughes-Jones Mark Leese GGF18, Washington, 13 th Sepetember 2006, Session 4: 19:15-20:00

2. © 2006 Open Grid Forum NMWG GGF18 Washington September 2006 R. Hughes-Jones Manchester 2 OGF IPR Policies Apply  “ I acknowledge that participation in this meeting is subject to the OGF Intellectual Property Policy. ”  Intellectual Property Notices Note Well: All statements related to the activities of the OGF and addressed to the OGF are subject to all provisions of Appendix B of GFD-C.1, which grants to the OGF and its participants certain licenses and rights in such statements. Such statements include verbal statements in OGF meetings, as well as written and electronic communications made at any time or place, which are addressed to: the OGF plenary session, any OGF working group or portion thereof, the OGF Board of Directors, the GFSG, or any member thereof on behalf of the OGF, the ADCOM, or any member thereof on behalf of the ADCOM, any OGF mailing list, including any group list, or any other list functioning under OGF auspices, the OGF Editor or the document authoring and review process  Statements made outside of a OGF meeting, mailing list or other function, that are clearly not intended to be input to an OGF activity, group or function, are not subject to these provisions.  Excerpt from Appendix B of GFD-C.1: ” Where the OGF knows of rights, or claimed rights, the OGF secretariat shall attempt to obtain from the claimant of such rights, a written assurance that upon approval by the GFSG of the relevant OGF document(s), any party will be able to obtain the right to implement, use and distribute the technology or works when implementing, using or distributing technology based upon the specific specification(s) under openly specified, reasonable, non- discriminatory terms. The working group or research group proposing the use of the technology with respect to which the proprietary rights are claimed may assist the OGF secretariat in this effort. The results of this procedure shall not affect advancement of document, except that the GFSG may defer approval where a delay may facilitate the obtaining of such assurances. The results will, however, be recorded by the OGF Secretariat, and made available. The GFSG may also direct that a summary of the results be included in any GFD published containing the specification. ”  OGF Intellectual Property Policies are adapted from the IETF Intellectual Property Policies that support the Internet Standards Process.

3. © 2006 Open Grid Forum NMWG GGF18 Washington September 2006 R. Hughes-Jones Manchester 3 Agenda  Agenda bashing Note Takers Please  Brief History Richard  Current Use of the NMWG Schemata Eric  The Version 2 Schemata – a simple introduction Richard  Summary of the Proposal to make the V2 Schemata a GGF draft Recommendation. Richard

4. © 2006 Open Grid Forum NMWG GGF18 Washington September 2006 R. Hughes-Jones Manchester 4 A Brief History

5. © 2006 Open Grid Forum NMWG GGF18 Washington September 2006 R. Hughes-Jones Manchester 5 Introduction: Charter The performance of most grid applications is dependent on the performance of the networks forming the grid. The Network Measurements Working Group (NMWG) identifies network metrics (aka characteristics) useful to grid applications and middleware, and develops standard mechanisms to describe and publish these characteristics to the Grid. The NMWG focuses on characteristics of interest to grid applications and works in collaboration with other standards groups such as the IETF IPPM WG and the Internet2 End-to-end initiative. The NMWG will determine which of the network characteristics are relevant to Grid applications, and pursue standardization of the attributes required to describe these characteristics. The first product of the NMWG will be a document categorizing the characteristics in use by network monitoring tools. This document will establish a dictionary that can be used by tools to publish their results. The second product will be a document recommending the XMLSchema to be used to publish the detailed attributes for these characteristics. In plain English: NM-WG will describe Grid relevant network characteristics, and how this can be made available to middleware, network operators etc. NM-WG will not look at how measurements should be made. From Mark’s Talk in Tokyo

6. © 2006 Open Grid Forum NMWG GGF18 Washington September 2006 R. Hughes-Jones Manchester 6 Characteristic Hierarchy Doc  “A Hierarchy of Network Performance Characteristics for Grid Applications and Services”  Document defines terms & relations: Network characteristics Measurement methodologies Observation  Nodes & Paths Defines the meanings Discusses the use & relations  For each Characteristic Defines the meaning Stated the attributes that SHOULD be included Discusses the issues to consider when making an observation  GGF Proposed Recommendation GFD-R.023 www.gridforum.org/documents/GWD-R/GFD-R.023.pdf

7. © 2006 Open Grid Forum NMWG GGF18 Washington September 2006 R. Hughes-Jones Manchester 7 History: Previous Work “A Hierarchy of Network Performance Characteristics for Grid Applications and Services” published June 2004 (Recommendation, GFD.23, http://www.ggf.org/documents/GFD.23.pdf) http://www.ggf.org/documents/GFD.23.pdf  Used to create schemata for describing network monitoring data.  Using a standard classification maximises data portability: your TCP achievable bandwidth is the same as someone else’s, even if the measurements were made differently (e.g. with different tools) path.bandwidth.Achievable Metadata: Description parameters: eg TCP + hierarchy

8. © 2006 Open Grid Forum NMWG GGF18 Washington September 2006 R. Hughes-Jones Manchester 8 Schemata: History  NM-WG then focused on standardizing schemas for exchanging network measurements  Extended concept to Requesting historical network measurements Requesting measurements to be made on demand Traps and Event Notification  NM-WG has Two sets of schemata: v.1::Monolithic, straight mapping of “characteristics” doc v.2::Framework: Base schema - common components, types, topology Add separate sub-schema for each characteristic and/or tool Framework has extensibility to just about anything Schema language: Relax-NG compact syntax

9. © 2006 Open Grid Forum NMWG GGF18 Washington September 2006 R. Hughes-Jones Manchester 9 Agenda  Agenda bashing Note Takers Please  Brief History Richard  Current Use of the NMWG Schemata Eric  The Version 2 Schemata – a simple introduction Richard  Summary of the Proposal to make the V2 Schemata a GGF draft Recommendation. Richard

10. © 2006 Open Grid Forum NMWG GGF18 Washington September 2006 R. Hughes-Jones Manchester 10 V2 Schemata as a GGF draft Recommendation

11. © 2006 Open Grid Forum NMWG GGF18 Washington September 2006 R. Hughes-Jones Manchester 11 V2 Schemata  We propose to make the Version 2 Schemata a GGF draft Recommendation. Is there agreement? Are there alternative suggestions/proposals?  Existing Information: “ NMWG Schema Developers Guide” Dan, Jason, Martin http://stout.pc.cis.udel.edu/nmwg/devguide.pdf http://stout.pc.cis.udel.edu/nmwg/devguide.pdf “How-to write your own schema” Dan www.gridforum.org/mail_archive/nm- wg/2005/02/pdf00001.pdf www.gridforum.org/mail_archive/nm- wg/2005/02/pdf00001.pdf Many.xml and.rnc files http://anonsvn.internet2.edu/svn/nmwg/trunk/nmwg/schema/ http://anonsvn.internet2.edu/svn/nmwg/trunk/nmwg/schema/

12. © 2006 Open Grid Forum NMWG GGF18 Washington September 2006 R. Hughes-Jones Manchester 12 V2 Schemata: Work needed  What work needs to be done? To the schemata: Corrections Additions For the Recommendation document itself: What form should the document take? Do we explicitly include the Base Schemata? What about common example schemata rtt/ping achievable throughput/ping … Definition of the Namespaces, nmwg probably yes what about the others we currently use?  How dependent is the Recommendation document on Relax NG?

13. © 2006 Open Grid Forum NMWG GGF18 Washington September 2006 R. Hughes-Jones Manchester 13 Base Schemata: Doc Structure Abstract 1.Introduction 2.Notational ConventionsSHOULD WOULD … Schemata Goals – separation; efficiency; scope request response re-usability Explain that definitive schemata is given in RELAX-NG, with XML appendix from specific tool Define use of: Namespaces, Data and Metadata chaining, timestamps, pre-defined elements Enough topology to define end-points & links Base Schema: description then RELAX-NG code nicely formatted Extension Schema defined (as in how to doc) using characteristic/tool “foo” N.Security Considerations N+1.Contributors N+2.Glossary N+3.Intellectual Property Statement N+4.Disclaimer N+5.Full Copyright Notice N+6.References

14. © 2006 Open Grid Forum NMWG GGF18 Washington September 2006 R. Hughes-Jones Manchester 14 Characteristic/tools Schemata: Doc Structure Abstract 1.Introduction 2.Notational ConventionsSHOULD WOULD … Explain that These Schemata MUST be used in conjunction with the NMWG Base Schema Define use of: nmwg Namespace of a given version Define the Extension Schema for each characteristic or tool: description then RELAX-NG code nicely formatted Typical full Schemata in use at the moment include: round trip delay; TCP achievable BW; ping; iperf; traceroute; N.Security Considerations N+1.Contributors N+2.Glossary N+3.Intellectual Property Statement N+4.Disclaimer N+5.Full Copyright Notice N+6.References

15. © 2006 Open Grid Forum NMWG GGF18 Washington September 2006 R. Hughes-Jones Manchester 15 Topology Schemata:  NMWG and HPRG have similar topology ideas and schemata  Harmonisation work Agreed

16. © 2006 Open Grid Forum NMWG GGF18 Washington September 2006 R. Hughes-Jones Manchester 16 V2 Schemata: Admin  Suggested Timescales: Paper Recommendation draft 0 by next OGF19 Jan/Feb 07 ‘Almost ready’ Recommendation document OGF20 May 07  Involvement ? Coordination: Eric Boyd Richard Hughes-Jones – offer to edit Mark Leese The experts : Dan Gunter Martin Swany Jason Zurawski More experts:

17. © 2006 Open Grid Forum NMWG GGF18 Washington September 2006 R. Hughes-Jones Manchester 17 Contact Details  Chairs: Eric Boyd (Internet2), eboyd@internet2.edueboyd@internet2.edu Richard Hughes-Jones (University of Manchester), R.Hughes-Jones@manchester.ac.uk R.Hughes-Jones@manchester.ac.uk Mark Leese (Daresbury Laboratory), m.j.leese@dl.ac.ukm.j.leese@dl.ac.uk  Website under re-construction: http://nmwg.internet2.edu  Mailing list: nm-wg@ogf.org To subscribe, https://forge.gridforum.org/sf/projects/nm-wg then Subscribe and fill in the web form

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