About — State Consistency
Context and positioning.
Context
State consistency becomes relevant where multiple state representations or observations are subject to defined consistency requirements or guarantees.
Different consistency models may permit different relationships among relevant states, including forms of temporary divergence or requirements for convergence.
Differentiation
State consistency differs from state synchronization, replication, consensus, quorum, and conflict-resolution mechanisms by describing the consistency requirement or condition rather than the mechanism used to achieve it.
It also differs from permanent state equality and from ACID consistency treated as a universal definition, because the applicable consistency guarantee remains system-dependent.
System Role
This reference positions state consistency as a constraint relationship among relevant state representations or observations and the consistency requirements that govern them.
It separates the condition of satisfying an applicable consistency guarantee from system-specific mechanisms used to maintain or restore that condition.