CAP理论

PrintProcessor

参数验证

PreProcessor

保存数据

读取队列

CP

加入队列

All nodes see the same data at the same time

一致性        Consistency         

SaveProcessor

2

1

CA

Reads and writes always succeed

打印数据

        可用性        Availability

Request

分区容错性Partition tolerance

AP

The system continues to operate despite arbitrary message loss or failure of part of the system