When Five Nines Is Not Enough
summary
AppNexus scales a geo‑distributed Aerospike cookie store to tens of billions of objects across half a dozen data centers, sustaining roughly millions of read/write ops per second and peaking around 5M transactions/sec. Traffic routes via BGP/anycast and DNS to nginx proxies and an impression/bidding pipeline that operates at sub‑10ms SLAs. Cluster fleet is ~200 nodes (~28TB largest cluster), hardware refreshes every three years, SSDs endure 24h burn‑in testing, metrics run in Graphite; the system achieves near‑zero downtime.
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chapters (10)
- 0:00Introduction
- 0:32Marketplace operations
- 2:58Architecture and scaling
- 5:21Real-time data processing
- 6:42Partnership with Aerospike
- 9:13Hardware and reliability
- 11:53Maintenance and upgrades
- 13:27Operational monitoring
- 15:26Technical Q&A
- 23:55Cloud vs. on-premises
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