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Topology
deploymentThe graph of services, infrastructure and their dependencies as they actually run: which service calls which, what it runs on, what it reads from. Topology is what lets an investigation follow a fault from the first symptom back to the change that caused it. Observed topology, derived from traces, traffic and deployment metadata, is more reliable than a documented one.
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More terms.
Root causeContributing factorTrigger, propagation, failureCausal chainEvidence indexSev1 / Sev2Post-incident reviewBlameless postmortemKnown errorProblem recordCause codeCAPAMTTIMTTDMTTRTime to RCARCA SLAService creditRFO (Reason for Outage)Change attributionService ownership mapCMDBTelemetry coverageAbstentionConfidence statementVPC deploymentAir-gappedData egressExpert podReplay bake-offOutcome-based pricingManaged serviceHuman-in-the-loop sign-offITSM