The Scout Operating System John H. Hartman Larry L. Peterson Todd. A. Proebsting Et al. The University of Arizona Department of Computer Science.

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Presentation transcript:

The Scout Operating System John H. Hartman Larry L. Peterson Todd. A. Proebsting Et al. The University of Arizona Department of Computer Science

Scout u OS for network appliances u Communication- oriented u Specialized u Predictable u Use paths to exploit global context u First-class abstraction for managing data flow Path 1Path2

Scout Status u Scout infrastructure is complete u Work in progress: u Scheduling u Resource allocation u Network appliance prototypes u Release planned by end of year

Network Appliances u NetCAM & NetTV u MPEG video generation and display u Reactive flow control (MFLOW) u Adaptive applications (end-to-end paths) u Status: basic functionality u IP router w/ QoS u Status: several scheduling algorithms

More Appliances u HTTP firewall u Limit information flow within firewall u Secure paths (Escort) u Status: basic routers implemented, Escort in progress u Joust: Java meets Scout u Status: simple applets u HTTP server u Status: runs, stress-testing in progress

Swarm Scalable Storage System u Scalable network storage u Direct client/storage server (disk) transfers u Fault-tolerant u Flexible storage abstraction Network

Swarm Storage Server u Provides low-level (non-file) storage abstraction u Large I/Os, non-overwrite (log-based) u Low latency, high bandwidth u Minimal computation, lots of data movement u Scout is ideal platform

Server Architecture SCSI LD Server Stub TCP IP