merkle tree to track changes coordinated at the vnode level runs as a background process exchange with neighbor vnodes for inconsistencies resolution semantics: trigger read-repair
Eventual Consistency Eventual consistency is a consistency model used in distributed computing that informally guarantees that, if no new updates are made to a given data item, eventually all accesses to that item will return the last updated value. Wikipedia
Distributed Consensus The problem of reaching agreement among remote processes is one of the most fundamental problems in distributed computing and is at the core of many algorithms for distributed data processing, distributed file management, and fault-tolerant distributed applications. Fischer, Lynch, Paterson