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Grid Networking issues

Grid Networking issues. Pascale.Primet@inria.fr INRIA-RESO http://www.ens-lyon.fr/LIP/RESO. Lessons. High Speed networks: WAN, LAN, SAN: optical, Gigabit Ethernet enable high performance distributed computing system creation.

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Grid Networking issues

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  1. Grid Networking issues Pascale.Primet@inria.fr INRIA-RESO http://www.ens-lyon.fr/LIP/RESO

  2. Lessons • High Speed networks: WAN, LAN, SAN: optical, Gigabit Ethernet enable high performance distributed computing system creation. • The Networking functionality isavailable everywhere due to IP technology • but it seems we discover that “the network cloud» is ashared uncontrolled resource. Issues! Performance, flexibility, security, heterogeneity… =>end to end issues =>user level perspective P.VICAT-BLANC/PRIMET

  3. Classify the issues • functional issues => long term research: • what grid user would like to do but cannot because the service does’nt exists(ex: API for e2e bandwidth reservation) • conceptual issues => medium term research • the service exists but does not behave correctly or is not designed for grid context • Adapt to grid context, find appropriate parameters • operational issues => engineering issues • grid user have to care on hardware and implementation details if they want to obtain the available service. • How to solve such technical issues at large scale? P.VICAT-BLANC/PRIMET

  4. Eg. Issues in Transport • Problems due to the applications • Problems related to the end system • Problems related to the TCP configuration • Problems related to the TCP protocol • Problems related to the network (SAN, LAN, access, core…) • GGF Data Transport Research Group • “Survey on Transport protocols other than TCP” • GGF GHPN document • Networking Issues of Grid Infrastructures • http://www.ggf.org/ • PFLDnet 2003 and 2004 workshop: • http://www.datatag.org/pfldnet2003/ • DataTAG played a very important role. P.VICAT-BLANC/PRIMET

  5. Perspectives • Do we want shared networks or not? • => deterministic path? • With whom do we want to share them? • How do we want to share them • - inter-fairness • - intra-fairness… • Do we want the Grid apps really use this resource? What do we do for this? • (remember the ATM story and APIs…!) • We have to see the Grid as a whole complex system • A long term process to tune it… P.VICAT-BLANC/PRIMET

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