Hi, Well in my case I can see the files in hdfs with supergroup ownership but this group is not exist at OS level.
I think if we are not providing below parameter value in XML file, the default group will be "supergroup" though it will exist at OS level. dfs.permissions.supergroup Thanks On 9/12/13, Chris Embree <cemb...@gmail.com> wrote: > Hadoop (HDFS and MapReduce) get group membership, etc. from the OS. The > only "exception" is that you define the HDFS Superuser Group in the XML. > It still must exist at the OS Level, but grants privs at the Hadoop Level. > > At least in HDP 1.x > > > On Wed, Sep 11, 2013 at 9:38 PM, Raj Hadoop <hadoop...@yahoo.com> wrote: > >> >> is this an actual group in Linux at the OS level or just hadoop specific? >> >> ------------------------------ >> *From:* kun yan <yankunhad...@gmail.com> >> *To:* "user@hadoop.apache.org" <user@hadoop.apache.org>; Raj Hadoop < >> hadoop...@yahoo.com> >> *Sent:* Wednesday, September 11, 2013 9:19 PM >> *Subject:* Re: 'supergroup' in Hadoop >> >> the user group 'supergroup' like linux root group... >> >> >> 2013/9/12 Raj Hadoop <hadoop...@yahoo.com> >> >> Hello All, >> >> When we install Hadoop, when does the user group 'supergroup' gets >> created. What is the significance of this ? Do we have any other groups >> apart from this group ? >> >> Thanks, >> Raj >> >> >> >> >> -- >> >> In the Hadoop world, I am just a novice, explore the entire Hadoop >> ecosystem, I hope one day I can contribute their own code >> >> YanBit >> yankunhad...@gmail.com >> >> >> >> >
