混合存储下的MapReduce启发式多表连接优化分析与实现

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1、·东华大学硕士研究生学位论文混合存储下的MapReduce启发式多表连接优化研究与实现3.4实时优化策略............................................................................................30 3.5本章小结....................................................................................................31 第四章多表连接优化策略实现...........

2、.................................................................32 4.1定义和符号................................................................................................32 4.2启发式多表连接优化策略MHMO..........................................................33 4.2.1连接关系图.................

3、.....................................................................34 4.2.2多表连接优化策略..........................................................................35 4.2.3混合连接优化策略实现..................................................................38 4.2.4MHMO与AQUA性能对比.................

4、.........................................42 4.3代价估计模型实现....................................................................................43 4.3.1确定连接顺序..................................................................................44 4.3.2确定连接算法................................

5、..................................................45 4.4实时优化实现............................................................................................46 4.4.1实时确定连接顺序..........................................................................46 4.4.2实时确定连接算法.....................

6、.....................................................47 4.5本章小结....................................................................................................49 第五章实验验证与分析........................................................................................51 5.1实验环境.......

7、.............................................................................................51 5.2数据集........................................................................................................51 5.3实验结果与评价..............................................................

8、..........................53 5.3.