On Tue, Aug 31, 2010 at 5:07 PM, Gang Luo <lgpub...@yahoo.com.cn> wrote: > Hi all, > I am the administrator of a hadoop cluster. I want to know how to specify a > group a user belong to. Or hadoop just use the group/user information from the > linux system it runs on? For example, if a user 'smith' belongs to a group > 'research' in the linux system. what is his account and group on HDFS? > > > Also, I want to know how to specify the prefix of the home directory. If there > are two directories on HDFS, '/usr/smith' and 'user/smit'. When smith input > 'bin/hadoop fs -ls ~/', which directory will he see? > > Thanks, > -Gang > > > > >
Currently hadoop gets its user groups from the posix user/groups. Your default home directory would be /user/smith. Directories like /usr/smith or /home/smith usually appear by accidental keystrokes, copy operations, etc. Regards, Edward
