~/talk

Avoiding Overload in Distributed Systems

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Shows concrete ways to keep goodput flat under overload: load shedding using CPU/latency/connection heuristics and an SDK circuit breaker to stop harmful retries; per-request isolation via AWS Lambda execution environments so each invocation gets fixed CPU/memory and latency stays flat; queue fixes using priority queues and moving messages (cheaper than full processing) to simulate LIFO behavior; and multi-tenant isolation with shuffle sharding (example: 8 queues with k=2 gives ~3.6% full overlap; 100 queues with k=5 drops overlap to negligible), plus autoscaling and backpressure.

AI-written summary · about

  1. 0:00Welcome
  2. 1:26Avoiding overload in distributed systems
  3. 8:10Load shedding techniques
  4. 13:47Queue systems and backlog
  5. 20:45Shuffle sharding
  6. 23:56Summary
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