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What are the Prerequisites for Hadoop Installation?

Prerequisites for Hadoop Installation

What are the Prerequisites for Hadoop Installation?

  • Description:
    To install Hadoop, ensure you have a compatible Linux-based operating system, Java Development Kit (JDK), and sufficient system resources (memory, CPU, and disk space). For a multi-node setup, configure SSH for passwordless communication between nodes. Additionally, set up Hadoop Distributed File System (HDFS) and configure the necessary environment variables.
Operating System:
  • Linux-based OS is preferred (such as Ubuntu, CentOS, or RedHat), as Hadoop is optimized for Unix-like systems. However, you can also install Hadoop on Windows using tools like Cygwin or Hadoop's Windows version.
Java Development Kit (JDK):
  • Hadoop requires Java to run, so a compatible version of Java (typically Java 8 or higher) should be installed. It can be verified using the java -version command.
Software Requirements:
  • Java: As mentioned, JDK 8 or higher is essential for Hadoop. Install it and set the JAVA_HOME environment variable.
  • Hadoop Distribution: Download the appropriate Hadoop distribution from the official Apache Hadoop website.
  • Configuration Files: Modify the Hadoop configuration files (core-site.xml, hdfs-site.xml, mapred-site.xml, yarn-site.xml) as part of the setup process.
Hardware Requirements:
  • CPU: A modern multi-core processor (e.g., Intel or AMD).
  • RAM: At least 8 GB of RAM is recommended for a single-node setup, and more RAM is required for multi-node clusters.
  • Disk Space: Sufficient disk space for Hadoop to store data, typically around 100 GB or more, depending on the use case.

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