基于键值存储上中间件技术的研究

Research on Middleware Based on Key Value Store

随着网络的快速发展，网络中的数据不断地快速增长，为了适应动态增长的工作负载，采用分布式的键值存储，将数据自动地分布存储到各个服务器上。本文介绍一种位于键值存储上的中间件技术，使用已经存在的关系型数据库的技术和知识，对数据进行合理布局，不仅能通过原表中的主键进行访问，还可以根据需要，进行非主键访问操作。并且，采用微分片在不牺牲键值存储弹性和可扩展性的前提下，以支持OLTP负载弹性。

With the rapid development of the network and continuously rapid growth of data in the network, the distributed key value storage which can store data on servers, is used to dynamically adapt to growing workloads. This paper introduces a middle- ware technology on top of a key-value store, uses existing knowledge and technologies in relational databases. Through building appropriate data layout, the data can be accessed by not only the primary key of original tables, but also the non-primary key based on demand. Also, the paper uses microsharding without sacrificing benefit of key-value store to support OLTP workloads e- lastically.