Hadoop - User

About

User in the context of Hadoop.

A user is the value returned from the authentication process.

Articles Related

Management

Creation with linux auth

Ie the user is the linux user starting the process

• Make a local user

sudo useradd -m userName
sudo passwd userName

• Create directories on hdfs for new user. See HDFS - User

hadoop fs -mkdir /user/userName
hadoop fs -chmod 777 /user/userName

Documentation / Reference

• Class:
  • org.apache.hadoop.security.UserGroupInformation
  • org.apache.hadoop.security.UserGroupInformation.getLoginUser
  • org.apache.hadoop.security.UserGroupInformation.getCurrentUser