Copy this bookmark:



description:


tags:



bookmark detail

Existential Consistency: Measuring and Understanding Consistency at Facebook
The metric is termed φ(P)-consistency, and is actually very simple. A read for the same data is sent to all replicas in P, and φ(P)-consistency is defined as the frequency with which that read returns the same result from all replicas. φ(G)-consistency applies this metric globally, and φ(R)-consistency applies it within a region (cluster). Facebook have been tracking this metric in production since 2012.
facebook  eventual-consistency  consistency  metrics  papers  cap  distributed-computing 
october 2015 by jm
view in context