An Availability Story

Marc Brooker from AWS talks about availability. 20m, very relevant stuff.

  • Availability is personal
  • Correlated failure limits availability
    • Redundancy isn’t always perfect (eg. Single points of failure)
  • Blast radius is critical to availability
  • My availability depends on the availability of my dependencies

The purpose of our system is not to hit an availability goal. (99.95% uptime)  It’s to service our customers. (People!) An uptime goal is a proxy for this.