This tutorial helps you to learn to manage our files on HDFS in Hadoop. You will learn how to create, upload, download and list contents in HDFS. Below commands will help you to how to create a directory structure in HDFS, Copy files from local file system to HDFS and download files from HDFS...
Sometimes you faced issue with Hadoop cluster setup on system with listing filesystem like ls: ‘.’: No such file or directory’. This issue occurs because of there is no home directory created on HDFS for your current user. In order to resolve this issue create the home directory on HDFS. For example, you are...
Namenode loads the filesystem state from fsimage and stays in safe mode and wait for data nodes to report their blocks. Safemode is a read-only mode for HDFS cluster, so that it does not prematurely start replicating the blocks. Use following command to let the namenode leave safemode forcefully. $ hadoop dfsadmin -safemode leave...