On Tue, Aug 31, 2010 at 5:28 PM, Allen Wittenauer <awittena...@linkedin.com> wrote: > > On Aug 31, 2010, at 2:43 PM, Edward Capriolo wrote: > >> 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? >>> >>> >> >> Currently hadoop gets its user groups from the posix user/groups. > > ... based upon what the client sends, not what the server knows.
Not anymore in trunk or the security branch - now it's mapped on the server side with a configurable resolver class. -Todd -- Todd Lipcon Software Engineer, Cloudera
