他们遇到的故障往往遵循同一个模式：上游某个问题导致数据库负载突然飙升，可能是缓存层故障导致的大规模缓存未命中，可能是昂贵的多表 JOIN 查询吃满了 CPU，也可能是新功能上线引发的写入风暴。

One of the most interesting trends in the computer world during the past few years has been the rapid growth of NoSQL databases. The term may be accurate, in that NoSQL databases don't use SQL in ...