ReliabilityatmassivescaleisoneofthebiggestchallengeswefaceatAmazon.com,oneofthelargeste-commerceoperationsintheworld;eventheslightestoutagehassignificantfinancialconsequencesandimpactscustomertrust.TheAmazon.complatform,whichprovidesservicesformanywebsitesworldwide,isimplementedontop