Constant system availability is assured by available failover capabilities. 故障转移能力确保了持续的系统可用性。
A system that is not tolerant to network partitions can achieve data consistency and availability, and often does so by using transaction protocols. 一个不能兼容网络分割的系统，经常会通过使用事务协议保证数据一致性和系统可用性。
