Mapreduce中Partitioner是用来控制输出到多个Reducer,因此可以通过修改Partitioner来指定key值传递到Reducer的方法
A. 对
B. 错
Mapreduce中的Combiner阶段可以理解为本地reduce,通过combiner可以减少从map传递到reduce的数据量,提高Mapreduce的程序效率
A. 对
B. 错
Please fill in the blanks with the right expression from thefollowing.(请从下列词汇表达中选择合适的,填入下面的句子中)align appreciated incorporated diet ingredients impact perspectiveclaim to cater to extend to1.From the__________of life,every life has its cycle.从生命的角度看,每种生命都有它的周期。
Please fill in the blanks with the right expression from thefollowing.(请从下列词汇表达中选择合适的,填入下面的句子中)align appreciated incorporated diet ingredients impact perspectiveclaim to cater to extend to2.Her speech made a profound_________on everyone.她的讲话对每个人都有深远影响。