Calculating the SLA of a system behind a CDN

Cache

  • Cache hit: when the request can be responded directly from the cache memory instead of going to the origin (our service)
  • Cache miss: when there’s no cached response available and the request should go all the way to the origin (our service) and probably be cached
  • Hit ratio = (Cache hit) / (Cache hit + Cache miss) * 100
  • Worse case scenario: cache Availability * origin Availability
  • Best case scenario: cache Availability

CDN

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Sr. Staff Engineer, Knowledge Worker, MSc Systems Engineering, Tech Lead, Web Developer

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Alex Ewerlöf

Alex Ewerlöf

Sr. Staff Engineer, Knowledge Worker, MSc Systems Engineering, Tech Lead, Web Developer

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