Thank you Allen. After I format the filesystem and restart hadoop, the permission control is enabled. I think it was caused by inconsistent state in HDFS.
Thank you very much! Starry /* Tomorrow is another day. So is today. */ On Fri, Dec 18, 2009 at 03:37, Allen Wittenauer <awittena...@linkedin.com>wrote: > Group permissions come from id/whoami/etc. So define them that way in UNIX > and it should get carried over to Hadoop. > > That said, it is probably the wrong behavior to have the default when group > resolution fails to be supergroup. > > > On 12/17/09 4:11 AM, "Starry SHI" <starr...@gmail.com> wrote: > > > Hi. > > > > My Hadoop cluster (0.20.1) has multiple users. When I use different > user's > > account to create a file in HDFS, I find that no matter what group the > user > > belonging to in Linux, the files in HDFS indicate that they belongs to > > userX, supergroup. I wonder why all users are belonging to group > > "supergroup"? Is there any way that the users can be assigned to > different > > groups in HDFS? I want to have them belong to different groups, so that > the > > user belongs to group A (say, oridinary user) cannot access to group B > (e.g. > > administrator group)? > > > > Hope to hear from your solutions soon! > > > > Starry > > > > /* Tomorrow is another day. So is today. */ > >
