ROC Part I: Failure DataLessons about human operators

• Human error is largest single failure source

  • HP HA labs: human error is #1 cause of failures (2001)
  • Oracle: half of DB failures due to human error (1999)
  • Gray/Tandem: 42% of failures from human administrator errors (1986)
  • Murphy/Gent study of VAX systems (1993):

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