Small Changes, Big Results
summary
EdgeCast runs a multi-terabit CDN across ~30 locations and measures behavior 116 billion times/month. A config-lookup refactor removes throughput degradation as configurations grow from hundreds to hundreds of thousands. On-demand purge is reworked for ~1.5 million invalidations/day by reorganizing cache objects, adding an edge filter to defer disk pushes and converting a push-heavy flow into a pull, saving infrastructure and latency. A kernel fix for wireless two-packet ordering cuts repeatable 2s stalls to about 100ms. Health checks, hierarchical origin shielding and dense metrics drive changes.
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chapters (9)
- 0:00Intro
- 0:47Performance is our product
- 1:22Scaling
- 2:16Force Multiplier
- 4:01Metrics
- 5:56Configuration Complexity
- 8:12OnDemand Validation
- 10:14Wireless Network Validation
- 10:54Summary
