Setting up Hadoop 3.2.1

Setting up Hadoop 3.2.1

I’ll show you a quick and simple method of installing Hadoop on both Ubuntu Server and/or Ubuntu Desktop, as you prefer. This certainly isn’t the first Hadoop tutorial ever, and they’re all relatively identical, but let’s give it a try.

D_oes Big Data scare you? Are you looking into a small and fairly quick introduction to Hadoop and Distributed Systems? Do you perhaps want to calculate the estimated value of Pi among different machines (nodes) by running a command at a master/primary machine? Well, worry not. Here, I’ll show you a quick and simple method of installing Hadoop on both Ubuntu Server and/or Ubuntu Desktop, as you prefer. This certainly isn’t the first Hadoop tutorial ever, and they’re all relatively identical, but let’s give it a try._

What are these terms? What do they do? A quick Glossary:

HadoopApache Hadoop is a collection of open-source software utilities that facilitates using a network of many computers to solve problems involving massive amounts of data and computation. It provides a software framework for distributed systems (a clustered file system) and processing of big data using MapReduce. Hadoop was originally designed for computer clusters built from common hardware. It has since also found use on clusters of higher-end hardware. All the modules in Hadoop are designed with a fundamental assumption that hardware failures are common occurrences and should be automatically handled by the framework.

*Yarn: *_Hadoop YARN _(introduced in 2012) is a platform responsible for managing computing resources in clusters and using them for scheduling users’ applications;

*HDFS: *_Hadoop Distributed File System (HDFS) _is a distributed file-system that stores data on commodity machines, providing very high aggregate bandwidth across the cluster;

*MapReduce: *Hadoop MapReduce is an implementation of the MapReduce programming model for large-scale data processing.

*Big data: *Big Data is a field that treats ways to analyze, systematically extract information from, or otherwise deal with data sets that are too large or complex to be dealt with by traditional data-processing software. Therefore, big data often includes data with sizes that exceed the capacity of traditional software to process within an acceptable time and value.

Computer Cluster: A computer cluster is a set of loosely or tightly connected computers that work together so that, in many respects, they can be viewed as a single system. Computer clusters have each node set to perform the same task, controlled and scheduled by software on a main master node.

*Master / Slave (or Primary and Secondary, modern times call for progressivity!): *A _master/primary _node is nothing more than the main computer or machine that will allow you to send commands down to every other node, called _slaves/secondar_ies, in a cluster which will perform the same task.

*Nodes: *A_ node_ is just each computer or device in our computer cluster. They contain data and are linked to every other node.

SSH: Secure Shell (SSH) is a cryptographic network protocol for operating network services securely over an unsecured network. Typical applications include remote command-line, login, and remote command execution, but any network service can be secured with SSH. The standard TCP port for SSH is 22.

*PDSH: *The pdsh tool is arguably one of the most popular parallel shells. It allows you to run commands on multiple nodes using only SSH, so the data transmission is encrypted. Only the client nodes need to have ssh installed, which is pretty typical for HPC systems. However, you need the ability to ssh to any node without a password (i.e., passwordless ssh).

*Virtual Machine: *In computing, a virtual machine (VM) is an emulation of a computer system. Virtual machines are based on computer architectures and provide functionality of a physical computer. Their implementations may involve specialized hardware, software, or a combination.

*Ubuntu: Ubuntu *is a _Linux _distribution based on Debian. It can run on the computer alone, or in a virtual machine. Ubuntu’s default desktop has been Gnome, since version 17.10.

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