关键词: 大规模在线课程, 自适应查询调度, 负载平衡, 负载消耗系数, Min-Min算法, Max-Min算法

Abstract: This paper proposed an adaptive query processing module which aimed to solve the problem that how to develop a better map plan for query to achieve users demand in limited resources of server and bandwidth on open online course system. In this paper, firstly, query expected cost matrix was set up according to the performance of resources and the cost of query tasks; secondly, the new A-MM (Adaptive Min-Min and Max-Min) algorithm that merged the merits of Min-Min and Max-Min was used for adaptive query scheduling; finally, experiments have been done and shown that the A-MM has higher efficiency and better balance capacity.

Key words: Massive Open Online Course (MOOC), adaptive query scheduling, load balance, consume load ratio, Min-Min algorithm, Max-Min algorithm