In contrast to CmRDTs, CvRDTs send their full local state to other replicas, where the states are merged by a function which must be commutative,associative, and idempotent. State-based Replication 发送端将自身的 全量状态 发送给接收端, 接 收端执行 merge 操作, 来达到和发送端状态 一致的结果 State-base replication 适用于不稳定的网络 系统, 通常会有多次重传 要求数据结构能够支持 交换律/结合律/幂等 性 这些特性 State-based Replication