Availability benchmarking 101

• Availability benchmarks quantify system behavior under failures, maintenance, recovery

• They require

  • A realistic workload for the system
  • Quality of service metrics and tools to measure them
  • Fault-injection to simulate failures
  • Human operators to perform repairs

Repair Time

QoS degradation

failure

normal behavior(99% conf.)

Source: A. Brown, and D. Patterson, “Towards availability benchmarks: a case study of software RAID systems,” Proc. USENIX, 18-23 June 2000

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