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Import data from Oracle Database to HDFS using Sqoop

Sqoop is a command-line interface application for transferring data between relational databases and Hadoop. Sqoop Helps in efficiently transferring bulk data between Hadoop and the Oracle database.

How to Configure Replication Factor and Block Size for HDFS?

Hadoop Distributed File System (HDFS) stores files as data blocks and distributes these blocks across the entire cluster. As HDFS was designed to be fault-tolerant and to run on commodity hardware, blocks are replicated a number of times to ensure high data availability. The replication factor is a property that can be set in the […]

33 Frequently Used HDFS Shell Commands

# Open a terminal window to the current working directory. # /home/training # 1. Print the Hadoop version hadoop version # 2. List the contents of the root directory in HDFS # hadoop fs -ls / # 3. Report the amount of space used and # available on currently mounted filesystem # hadoop fs -df […]

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