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Intro Agent Grid Repast Simulator

Intro Agent Grid Repast Simulator. Fills the gap on agent-based Grid simulators very high-level Grid Model but provides validated Network & Resource model focus on Agents and not technical Grid issues leverages Repast tools for visualization & analysis

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Intro Agent Grid Repast Simulator

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  1. Intro Agent Grid Repast Simulator • Fills the gap on agent-based Grid simulators • very high-level Grid Model • but provides validated Network & Resource model • focus on Agents and not technical Grid issues • leverages Repast tools for visualization & analysis • Will focus on community (sourceforge project) to enhance the tool Isaac Chao Andrade, Politechnical University of Catalonia Agents and Grids: towards the intelligent grid Edinburgh, 19 February, 07 www.thinkingrid.com

  2. Agent Grid simulator, why? • Think in Grid startup (Barcelona) targets • Pervasive Grid (…. + Smartphones, PSP, etc) • Social Communities around Grid • Requirement: • Adaptive, scalable, Grid coordination mechanisms • … then use MAS, but need extensive testing • … then need Agent Grid simulator

  3. State of the Art Grid Simulators • Too low level, too much Grid technical detail • Gridify app in jobs, scheduling techniques • Model resources CPU (MFLOPs, etc) • Model Network packet routing…. • Complex from a MAS point of view • Focus for most IA researchers might be instead • Decision making • Grid coordination • No support for easy MAS development & analysis

  4. Two well known Grid Simulators • GridSim (GRIDS Lab,University of Melbourne ) • too low level model : network packet routing • poor doc: no user manual, just code examples • no validation: need contrasting to a real system! • SimGrid (ID Laboratory, Grenoble,France) • High level & validated Network/Resource model • Too focused on Grid scheduling low level details • C/based (hard to combine with Java tools)

  5. Agent Grid Repast Simulator (I) • Built on top of Repast: • Relies on a very well tested simulation engine • Leverages excellent Repast tools for visualization & analysis • Provides: • Grid Resource and Network model, inspired on SimGrid validated high level models • submission of jobs and data transfers into the Grid and the operation of the Grid itself • agents controlling the scheduling/load balancing • Graphical display of the Grid and related Grid statistics by leveraging Repast facilities

  6. Agent Grid Repast Simulator (II) • Goes to open-source, released GPL at sourceforge: • Enhance the Resource and Network Models • Add features to the agent framework • Towards a tool for the specific community meeting Agent and Grid systems • The Demo:

  7. The gory details I: Resource Model • Grid Nodes (extending repast DefaultNodes) modeling Job processing at Grid Resources • Model coming from SimGrid high-level models: • Each CPU is defined by a rate that can vary over time and that is equally shared between tasks • “validated" this model by running instances of the same program , doing a dgemm (matrix multiply routine) • We add • background load, availability

  8. The gory details II: Network model • Grid Edges (extending repast DefaultEdge) modelling the data Transfers over the links using an underlying physical NetworkModel. • Proportional bandwidth sharing: OK for LAN • From paper: Network Modeling Issues for Grid Application Scheduling H. Casanova, in the International Journal of Foundations of Computer Science (IJFCS), 6(2), 145--162, 2005 ( SimGrid people) • + background traffic and availability • Needs to be extended for TCP in WAN

  9. The gory details III: Agent Framework • Allows creation of agents to coordinate the job submission, load balancing and resource management on top of the Grid Model • Just need to extend Agent class and implement methods from the learning Agent interface • So far we have tested: • Reinforcement Learning for scheduling/load balancing

  10. Goes Open source • GPL license at sourceforge: Towards a tool for the Agent Grid research community • Improvements required: • Extend Network model with high level model for shared TCP flows over WANS ( follow SimGrid papers) • Extend Network & Resource Models with interference of computation with communication - build on the paper: “On the Interference of Communication on Computation in B. Kreaseck, L. Carter, H. Casanova, J. Ferrante April 2004. • AgentFramework development: Interfaces /Routines for Negotiation, ResourceManagenet, Mobile Agents,etc

  11. Questions ? • Interest in joining at sourceforge? • Contact: ichao@thinkingrid.com www.thinkingrid.com

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