分布式数据库系统的动态负载平衡策略及算法设计

随着网络中数据库应用的发展，使得分布式数据库系统的负载平衡问题突显出来。目前大多数分布式数据库管理系统没有负责平衡功能，其负载平衡依赖于操作系统的负载平衡机制来解决，这样带来的问题是系统负载的评价粒度细小和负载转移的开销增加。讨论了动态负载平衡策略的要素，针对分布式数据库系统的负载平衡问题，提出了以事务队列长度作为负载评价标准，并给出了一个动态负载平衡策略及算法。

Strategy and algorithm design for dynamic load balancing in distributed database system

As the development of database application on network, the load-balancing problem in distributed database system comes forth. At present, most of distributed database system has not load balancing function, and the function depends on load balancing function of operating system, which results in small evaluating grain and big spending of load transferring. Basic factors of dynamic load balancing strategies are discussed. A standard of load value of transactions in allusion to problems of load balancing in distributed database systems is put forward, and a dynamic load balancing strategy and algorithm is presented.