try set mapreduce.job.reduces
[email protected] 发件人： 郭帅 发送时间： 2015-03-27 18:17 收件人： hiveMailing 主题： change Reduce_Number Of Order_By I have some problems when I insert data with order by . The data is non-uniform ， I changed the configuration below 1. set hive.optimize.sampling.orderby=true; 2. set hive.optimize.sampling.orderby.number=100000; 3.set mapred.reduce.tasks=100; but when the sampling had done , there were only 2 reducer for the job . Could I make it 100 and How. -- have a nice day～guoshuai
