问题
Is there ln -s in hadoop HDFS?
For instance:
I have 10 files in HDFS
/user/hadoop/input, which is 1.txt, 2.txt ... 10.txt
Another dir in HDFS is /user/hadoop/test
I just wanna copy 1 file from /user/hadoop/input/1.txt to /user/hadoop/test/1.txt.
The simplest way is use hadoop dfs -cp /user/hadoop/1.txt /user/hadoop/test.
But it cost more time and disk space. Is there a way like shell such as hadoop dfs -ln /user/hadoop/1.txt /user/hadoop/test/1.txt ?
回答1:
HDFS supports Symbolic links. Check 1, 2, 3, 4 for more details. So, it can be done using Java API, but never came across a CLI for the same.
来源：https://stackoverflow.com/questions/13401118/is-there-ln-in-hadoop-hdfs