Setting Permissions on Files and Directories

Scenario

HDFS allows users to modify the default permissions of files and directories. The default mask provided by the HDFS for creating file and directory permissions is 022. If you have special requirements for the default permissions, you can set configuration items to change the default permissions.

Configuration Description

Parameter portal:

Go to the All Configurations page of HDFS and enter a parameter name in the search box by referring to Modifying Cluster Service Configuration Parameters.

**Table 1** Parameter description
Parameter	Description	Default Value
fs.permissions.umask-mode	This umask value (user mask) is used when the user creates files and directories in the HDFS on the clients. This parameter is similar to the file permission mask on Linux. The parameter value can be in octal or in symbolic, for example, 022 (octal, the same as u=rwx,g=r-x,o=r-x in symbolic), or u=rwx,g=rwx,o= (symbolic, the same as 007 in octal). NOTE: The octal mask is opposite to the actual permission value. You are advised to use the symbol notation to make the description clearer.	022