1. IXP1200 Applications Ada Gavrilovska, Jiantao Kong, Weidong Shi, Xiaotong Zhuang Dr. Karsten Schwan, Dr. Ken Mackenzie Scalable Real Time Media Streaming on IXP1200 Design Architecture DWCS on IXP1200 Delta Air: An Operational Information System Content-based processing in the IXP1200  IXP1200 as a cluster front-end, receives streaming data from external sources, and performs selective, application-specific mirroring and/or filtering, data striping or stream differentiation.  RUDP used as underlying transport protocol at source nodes, IXPs and cluster destination-nodes, to guarantee reliable communication over the wide- area network. Motivation Combine IXP1200 and DWCS (dynamic window- constrained scheduling) as a media gateway to ensure QoS for large scale real time media streams IXP1200 Media Server Features of Our Design  Multiple hierarchically indexed linear queues to speed up scheduling  Less amount of SRAM and DRAM accesses per scheduling cycle than priority Queue  Scheduling rate independent of number of active streams DWCS QoS Scheduler Sender thread Dropper thread DWCS QoS Scheduler Sender thread Dropper thread Admission Control & Status Monitor Admission Control & Status Monitor StrongARM µEngines Protocol Processing & Enqueue Packet Receiver threads Protocol Processing & Enqueue Packet Receiver threads Packet Transmission Transmission threads Packet Transmission Transmission threads SDRAM Stream Records SDRAM Stream Records  Parallel packet scheduling and dropping so that packet dropping is not in the critical path of scheduling.  High scheduling rate sustains thousands of streams Airport LAN Airport LAN Airport LAN Airport LAN Cluster Computing Real-Time Information Processing Cluster Computing Real-Time Information Processing SimulationOptimization Baggage Status Operationa l Flight Displays Baggage Displays Crew and Equipment Status FAA Flight Data Passenger paging and response Gate Readers Wide-area Transport High Performance Computing Real-time Decision Tools Scalable Robust Services Storage capture, display, transport, filter, transform Real-Time Information Transport Visualization Recovery and Replay Real-time Situation Assessment Security Systems Equipment Inspection Airplane Data Traffic IXP Based Data Distribution Management on Federated Simulation system Example 2 Example 1 Example 3 Data Distribution Management Federated Simulation Data Distribution Management Federated Simulation Data Distribution Management Federated Simulation Network Role of Data Distribution Management in Distributed Simulation  Filtering federates should only receive data that they want  Group Management entity data subscribe and publish. Each Federate simulates certain number of entities. Data Distribution Management Federated Simulation IXP Network Federates  Dynamic application interest management. Each federate should only receive the data it wants.  Multicast and group management. Simulation often requires large number of groups. The system should scale well when the number of groups increases.  Fast delivery of object states and attributes. Solution for DDM on IXP1200  Active Interest filtering  group management and multicast  Simulation data cache Challenges in DDM Application-level Filtering and Mirroring  RUDP necessary since application-specific handlers operate on data content, not just header information.  Data formats are used to interpret bits in memory and access desired data fields content.  Handlers can be invoked as soon as necessary data present, which can prevent potentially unnecessary memory accesses.  For smart mirroring output data can be customized in a destination-specific manner