Event Subsytem
Design goals

• Low latency, high bandwidth
• Efficient
• Reliable message passing
• N-way multicast
• Guarantee in-sequence deliver

Event client

• Client API
• Thread within application code
• Non-blocking
• Send
• Broadcast
• Point-to-point
• Receive
• Blocking
• Polled
• Call back
• Event stream subscription
• Classes of service (in development)
  Support for QoS
• Miscellaneous services
• Server synchronization
• Timing

Event server

• Robustness
• Scalability
• Distributed servers (in development)
  • Client fan-in, fan-out
  • Caching slave servers on network boundary
  • Reduced bandwidth across core network
• Multi-threaded implementation
  monitor, broadcasters, receivers
• Event sequencing
• Manage broadcast streams
• Monitor clients
• Adaptive packet sizing
• Performance
  Fast Ethernet Lan: 2-10 msec latency, 30-65 Mbs

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