Big Data Systems HPI

Quiz 2 - Cloud Computing & Distributed File Systems


Question

Cloud providers give availability guarantees in number of 9's. Calculate the maximum down time a system can have in one year for the given availabilities. Assume that a year consists of 365 days (no leap year, no leap second). Note the different units for the different availabilities.

If the solution is a decimal number, please provide the number with 2 decimal points (e.g. 0.12, 1.58, etc.)

  • Availability guarantee of 90%
  • Availability guarantee of 99%
  • Availability guarantee of 99.9%
  • Availability guarantee of 99.99%
  • Availability guarantee of 99.999%
  • Availability guarantee of 99.9999%

Answer
  • 876h
  • 5256min
  • 525.6min
  • 3153.6sec
  • 315.36sec
  • 315.36sec



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