Failover
Detection latency, promotion, fencing and the cost of failing over wrongly.
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This topic is part of the curriculum but has no questions, cards or glossary entries so far. The rest of Reliability & Resilience may still cover what you are looking for.
Neighbouring topics
Reliability & Resilience
General material on designing for failure.
SLI, SLO & SLA
The measurement, the internal target, and the contractual commitment.
No content yetError Budgets
Unreliability as a resource that feature velocity spends.
Availability Mathematics
Series dependencies multiplying, and redundancy that is not independent.
No content yetRTO & RPO
How long recovery may take and how much data may be lost.
No content yetRedundancy
N+1, N+2 and 2N, correlated failure, and headroom for the failure itself.
No content yetGraceful Degradation
Reduced but useful function when a dependency is gone.
No content yetFault Isolation
Cells, zones, tenants and the partitions that bound a failure.
No content yetChaos Engineering
Hypothesis-driven failure injection with a bounded blast radius.
No content yetGame Days
Testing the response — runbooks, access, comms — not only the system.
No content yetIncident Management
Command roles, severity levels and mitigation before diagnosis.
No content yetPostmortems
Finding the systemic conditions, and completing the actions afterwards.
No content yetOn-Call
Sustainable rotations, actionable pages and handover discipline.
No content yetCapacity Planning
What does not autoscale, and the lead-time items that need a date.
No content yetDR Testing
Restore drills, timed against the stated RTO, into a clean environment.
No content yetResilience Testing
Exercising retries, breakers and fallbacks that are otherwise never run.
No content yetStatic Stability
Serving from existing state when the control plane is unavailable.
No content yetDegradation Modes
Deciding in advance what is shed first and what is protected.
No content yetReliability Culture
Blamelessness, error budget policy and reliability as a funded property.
No content yet