I would like to set up HDFS permissions in CDH4, with the following requirements:
- Everyone can read everything from all HDFS directories
- Each user can only write to his user directory on HDFS
- Except a special user who can write everywhere
This is a simplified version of the requirements, but it's a good start.
The question is - how do I configure this? Do I have to have Kerberos set up? The Cloudera security guide only discusses Kerberos, but I don't think I need a strong authentication scheme at this point.
A step-by-step guide would be really helpful, as I'm new to Hadoop.