Hi Shreya, A permissions guide for HDFS is available at: http://hadoop.apache.org/common/docs/current/hdfs_permissions_guide.html
The permissions system is much the same as unix-like systems with users and groups. Though I have not worked with this, I think it is likely that all permissions will need to be applied after putting files into HDFS. Hope that helps, Ben On 22 February 2012 10:41, <shreya....@cognizant.com> wrote: > > > Hi > > > > > > I want to implement security at file level in Hadoop, essentially > restricting certain data to certain users. > > Ex - File A can be accessed only by a user X > > File B can be accessed by only user X and user Y > > > > Is this possible in Hadoop, how do we do it? At what level are these > permissions applied (before copying to HDFS or after putting in HDFS)? > > When the file gets replicated does it retain these permissions? > > > > Thanks > > Shreya > > > This e-mail and any files transmitted with it are for the sole use of the > intended recipient(s) and may contain confidential and privileged > information. > If you are not the intended recipient, please contact the sender by reply > e-mail and destroy all copies of the original message. > Any unauthorized review, use, disclosure, dissemination, forwarding, > printing or copying of this email or any action taken in reliance on this > e-mail is strictly prohibited and may be unlawful. >
