A.Combiner組件的引入可減少MapTask輸出數(shù)據(jù)量(磁盤IO) B.Combiner組件的引入可減少Reduce-Map網(wǎng)絡傳輸數(shù)據(jù)量(網(wǎng)絡IO) C.Combiner組件可看作是localreducer D.任何數(shù)據(jù)處理應用都可以用Combiner組件
A.16M B.32M C.64M D.128M
A.FlumeNG B.Scribe C.Rsync D.FTP