database - CAP 定理与多主复制有何关系？

Question

在 CAP 定理的上下文中，这两件事有什么关系？异步多主数据库系统具有哪些属性？

Answer 1

first, this theorem about multi-master databases (in terms of theorem "distributed system"), so the relation is straightforward

next issue: if you have asynchronous system, this mean that at some particular moment data in one node is not the same as in another node, so this system is not "consistent", as system is not consistent and some node fails - data from this node are totally lost, and there is no copy in other nodes

so theory says: "system cannot be consistent and available and partition tolerant at the same time" - asynchronous multi-master database provide only 1 guarantee, so theorem is correct