What are file permissions in HDFS and how HDFS check permissions for files or directory?
Answer Posted / Deepak Goswami
File permissions in HDFS are similar to UNIX-based file systems. They determine the read, write, and execute permissions for three types of users: user (the owner), group, and others. HDFS checks permissions when a client attempts an operation on a file or directory. The permissions are defined using chmod command in Hadoop, and they are stored as a part of the file's metadata. The permission for each user is represented by a three-digit number where the first digit represents the owner, the second digit the group, and the third digit others.
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