Hi Genius, If I understand correctly, the shell command "cp" for the HDFS is not atomic, is that correct?
For example: ./bin/hdfs dfs -cp input/a.xml input/b.xml This command actually does 3 things, 1. read input/a.xml; 2. Create a new file input/b.xml; 3. Write the content of a.xml to b.xml; When I looked at the code, and the client side actually does the 3 steps and there are no lock between the 3 step, does it mean that the cp command is not guaranteed atomic? Thanks a lot for your reply.
