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Jeff Chase

Control Framework: Laying the Foundations Scheduling, stitching, and all that GENI Engineering Conference 6 Salt Lake City, Utah. Jeff Chase. Federation: “It’s likely to be tough”. NSF GENI. Chip Elliott @ GEC4. Weak Federation: Easy to Implement, Hard to Use. ???.

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Jeff Chase

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  1. Control Framework: Laying the FoundationsScheduling, stitching, and all that GENI Engineering Conference 6Salt Lake City, Utah Jeff Chase

  2. Federation: “It’s likely to be tough” NSF GENI Chip Elliott @ GEC4

  3. Weak Federation: Easy to Implement, Hard to Use ??? • How much can we gloss over stuff that’s going to be hard later?

  4. Maybe the Clearinghouse can handle it? Chip Elliott @ GEC4 Standard issue BBN napkin

  5. Federation vs. Confederation • What does CH know? • Does CH wield power? • Do AMs trust CH? • How much do AMs know about identity? • About federation? • What commitments do AMs make to “the facility”?

  6. We COULD put policy anywhere • Policies are formulated, implemented, and enforced. • These don’t have to happen at the same place. • Place functions at the lowest suitable level.

  7. Enforcing system-wide policy as needed Implement system-wide policy as needed. “The GENI system shall provide mechanisms to implement clearinghouse-wide resource allocation policies…. This will allow funding agencies or other component contributors to put overall constraints on how their components will be used.” No, you can’t have all resources “I wantthem all!” Identified Aggregates Enable system-wide usage policies as the need arises. Left-hand side from Chip Elliott @ GEC4

  8. Time • Does access policy consider duration? • Does GENI meter resource usage? • Is GENI “fair”? • Where/how do we represent time and reason about it? • Can AMs donate temporarily? Can they withdraw resources? How do they notify users?

  9. Stitching • Common labels at junction points • How to connect them? • AMs negotiate? • CH or SM coordinate? • Isolation, security? • How to join slivers/slices across different aggregates end-to-end? • Who can reason about overall topology?

  10. Representing Complex Substrates • Multiple layers • Topology • Location • Dynamic state • Cyberphysical • What does CH know? • Declarative vs. code

  11. Subgraph embedding: NSF backbone Yufeng Xin, RENCI

  12. Declarative Programming Example • Subgraph mapping example: 4-node ring mapping String selectStr="SElECT ?Node1 ?Node2 ?Node3 ?Node4 ?Inf1 ?Inf21 ?Inf3 ?Inf4 " ; String whereStr="WHERE {" + "?Node1 ndl:hasInterface ?Inf11."+ "?Inf11 ndl:linkTo ?Inf21."+ "?Inf21 ndl:interfaceOf ?Node2. "+ "?Node2 ndl:hasInterface ?Inf22."+ "?Inf22 ndl:linkTo ?Inf31. "+ "?Inf31 ndl:interfaceOf ?Node3. FILTER(?Node1 != ?Node3) "+ "?Node3 ndl:hasInterface ?Inf32."+ "?Inf32 ndl:linkTo ?Inf41. "+ "?Inf41 ndl:interfaceOf ?Node4.FILTER(?Node2 != ?Node4)"+ "?Node4 ndl:hasInterface ?Inf42."+ "?Inf42 ndl:linkTo ?Inf12. "+ "?Inf12 ndl:interfaceOf ?Node1.”+ " }"; queryPhrase=createQueryString(selectStr, fromStr, whereStr); results = rdfQuery(ontModel,queryPhrase);

  13. Visions of GENI, 2006 Site A PEC Internet Urban Grid Access Network Site B PAP PEN PCN GGW GGW PCN PCN PEN GENI Backbone Sensor Net PEN PAP Suburban Hybrid Access Network PAP: Programmable Access Point PEN: Programmable Edge Node PEC: Programmable Edge Cluster PCN: Programmable Core Node GGW: GENI Gateway PAP

  14. A Sense of History

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