Concept

Consensus

Consensus is agreement under uncertainty: multiple participants decide on one value even when messages and machines may fail.

Consensus exists because coordination needs rules. The practical lesson is that agreement has a cost: latency, complexity, operational burden, and sometimes reduced availability.

Where This Connects

Concept

Distributed Systems

A distributed system is a system made of independent components that communicate over a network to behave like one useful whole.

Concept

Fault Tolerance

Fault tolerance is the engineering discipline of designing for partial failure instead of assuming perfect components.

Mental Model

Trade-offs

A way to reason about engineering choices where improving one property changes cost, complexity, risk, or behavior elsewhere.

SoftwareInfrastructureProduct engineeringLeadershipDecision-making

Knowledge Entry

CAP Theorem

A principle describing trade-offs between consistency and availability during network partitions.

Aug 24, 2026 · 1 min read

Knowledge Entry

Distributed Systems

Systems whose components coordinate across network boundaries while tolerating latency, disagreement, and partial failure.

Aug 24, 2026 · 1 min read

A Path Through This Area

articleCAP Theorem

articleDistributed Systems