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differential-observability · unknown

Differential observability

Differential observability is a difference between entities' observations of the same system's health.

Related Observatory article: Differential observability on hesela.com

The gray-failure case is asymmetric: the application observes trouble and the internal observer does not; a detector noticing a problem before an application is affected is a different case. [1]

Relations

related
gray-failure, fail-slow

Citations

  1. Huang et al., Gray Failure: The Achilles' Heel of Cloud-Scale Systems, HotOS 2017, section 3; DOI 10.1145/3102980.3103005. (accessed 2026-10-13)
  2. Hesela: Fail-slow NVMe SSDs: what SMART and heartbeats miss (accessed 2026-10-13)

JSON: /data/terms/differential-observability.json