Hi， I think it' better using Copy in the same cluster while using distCP between clusters, and cp command is a hadoop internal parallel process and will not copy files locally.
________________________________ 麦树荣 From: KayVajj<mailto:[email protected]> Date: 2013-04-11 06:20 To: [email protected]<mailto:[email protected]> Subject: Copy Vs DistCP I have few questions regarding the usage of DistCP for copying files in the same cluster. 1) Which one is better within a same cluster and what factors (like file size etc) wouldinfluence the usage of one over te other? 2) when we run a cp command like below from a client node of the cluster (not a data node), How does the cp command work i) like an MR job ii) copy files locally and then it copy it back at the new location. Example of the copy command hdfs dfs -cp /<some_location>/file /<new_location>/ Thanks, your responses are appreciated. -- Kay
