BigData

Hadoop Security – Hadoop HDFS File Permissions

Hadoop HDFS file permissions are almost similar to the POSIX file system. In a Linux system, we usually create OS level users and make them members of an existing operating system group. But in Hadoop, we create directory and associate it with an owner and a group. Hadoop HDFS File and Directory Permissions The following sections show Hadoop HDFS file and directory permissions: Just like Linux operating system, Hadoop uses notation (r,w) to denote read and write permissions. There is an execute (x) permission for files but you cannot execute…

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November 2, 2017
BigData

Basic Hadoop HDFS Filesystem Operations With Examples

There are many interfaces to HDFS available, but the command line (CLI) is one of the simplest and, to many developers, the most familiar interface. You can perform most advanced and basic Hadoop HDFS filesystem operations using CLI. Basic Hadoop HDFS Filesystem Operations The when Hadoop HDFS filesystem is set, you can do all of the basic HDFS filesystem operations, such as reading files, creating directories, moving files, deleting data, and listing directories. You can also perform the advance Hadoop HDFS filesystem operations such as updates, administrator from command line.…

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October 31, 2016