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Maintaining the Fastest CDN at Netflix on FreeBSD

8 days ago
https://freebsdfoundation.org/netflix-case-study/
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  • #FreeBSD
  • #Netflix
  • #Content Delivery Network
  • Netflix uses a customized FreeBSD-based firmware for its Open Connect CDN, handling terabits of traffic per second.
  • Originally starting with FreeBSD 9.0-RELEASE, Netflix optimized FreeBSD for performance, leading to significant cost savings.
  • Netflix tracks FreeBSD-CURRENT to quickly identify and address regressions, reducing technical debt.
  • Key optimizations include Kernel TLS (KTLS), RACK TCP stack, asynchronous sendfile, and VM page caching enhancements.
  • Collaboration with the FreeBSD community, including contributions from Netflix engineers, has driven innovations like KTLS.
  • Netflix emphasizes upstreaming changes to FreeBSD to minimize divergence and maintain alignment with the core project.
  • Best practices include community engagement, rigorous testing, and strategic upstream contributions.
  • Future directions involve continued collaboration with the FreeBSD community to leverage its flexibility and performance.
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