hadoop - Use of Group and roles in HDFS -


i new hdfs, when run hadoop fs -ls /tmp/data command , below output

-rw-r--r-- 2 root root 52784 2014-08-01 09:52 /tmp/data/sample1.pdf
-rw-r--r-- 2 root root 52784 2014-08-01 09:52 /tmp/data/sample2.pdf


output wanna know
which group? , use of group ? user?

1st root user , 2nd root group.

group used group users under restrict access hdfs directories based on groups.


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