Exploring Next
Exploring Next — Ep 220 w/ Justy & Cody — Netflix Uncovers Kernel-Level Bottlenecks While Scaling Containers on Modern CPUs
Netflix discovered that scaling hundreds of containers simultaneously hits deep kernel-level bottlenecks in the Linux virtual filesystem, where thousands of mount operations create lock contention that varies dramatically across different CPU architectures. Their solution involved redesigning overlay filesystems to reduce mount operations from O(n) to O(1) per container.