Hadoop Distributed Computing


Apache Hadoop is a Java-based programming model & decentralized data processing system that is open-source and free. It helps you divide down Big Data analytics computing workloads into smaller chunks. An algorithm is used to run these tasks in parallel. But the same thing happens when a Hadoop cluster is used.

A Hadoop structure is a group of computers that simultaneously handle large amounts of data. These aren’t the same as other computer clusters. Hadoop clusters are designed for storing, managing, and analyzing enormous amounts of data. This data can be both structured and unstructured within a distributed computer ecosystem. Distributed computing Hadoop ecosystems are also distinct from conventional computer clusters in that they have a distinct structure and architecture. Clusters of Hadoop also include a network with both enslaver & agent nodes. Within it, there is wide availability and low-cost, basic hardware.

Furthermore, we require distributed computing software to work with dispersed systems. The software should manage and coordinate various processors and devices within the distribution ecosystem. As companies like Google grew larger, they began to develop new software. This most recent version is designed to work on all distributed systems.

Cluster Architecture for Hadoop

Introduction to Hadoop Distributed File System(HDFS) - GeeksforGeeks

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A master-slave architecture is used in Hadoop clusters. It’s defined as a network between master & worker nodes that coordinate and execute various operations across the HDFS. The controller nodes in the Hadoop filesystem often uses high-quality hardware. This consists of a Data node, Task Scheduler, and JobTracker, each running on its machine. Virtual machines (VMs) running both DataNode & TaskTracker applications on distributed computing commodity hardware make up the worker nodes. Under the direction of the controller nodes, they do the work of data storage and processing numerous tasks. The Client Nodes are the final component of the HDFS system. These are in charge of loading data and obtaining outcomes.

The various components of the distributed computing Hadoop cluster design are mentioned below:

Nodes that serve as masters

These are in charge of storing data in HDFS and managing critical processes such as using MapReduce to perform parallel computations on the data.


HDFS (Hadoop Distributed File System) - Distributed Computing in Java 9 [Book]

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The real data from the HDFS store is processed extensively in this Google-built system, which is based on Java. MapReduce breaks down a large data processing operation into smaller tasks, making it easier to handle. This is also in charge of processing large datasets simultaneously before reducing them to obtain the desired result. Hadoop MapReduce is a Hadoop framework built on the YARN architecture. Furthermore, the Hadoop design based on YARN allows for distributed parallelization of large data volumes. And MapReduce provides a foundation for writing applications that can run on thousands of servers with ease. It also considers the flaw, and failure management is used to reduce risk.

The operation of MapReduce is based on a fundamental processing principle. The “Map” job, in other words, delivers a query to different nodes in a Hadoop cluster for processing. And the “Reduce” operation compiles all of the results into a single value.

Nodes with workers

Most of the distributed computing virtual servers (VM) in a Hadoop are located on these nodes. They are responsible for data storage and calculations across clusters. In addition, each worker node hosts the DataNode & TaskTracker services. They’re useful for retrieving instructions from controller nodes for processing.

Nodes that serve as clients

The participating nodes are in charge of loading data into the cluster. These nodes start by submitting MapReduce tasks that specify how data should be processed. When the processing is finished, they retrieve the results.

Hadoop Components

A closer look at Hadoop: Hadoop architecture, features of various components and significant for big - Alibaba Cloud Developer Forums: Cloud Discussion Forums

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The fact that numerous Hadoop modules provide excellent support for the system.


Within Big Data, the Hadoop Distributed File System, or HDFS, aids in the storage and retrieval of many files at rapid speeds. The GFS article, issued by Google Inc., served as the foundation for HDFS. This specifies that the files would be divided into blocks & stored in the distributed structure’s nodes.


YARN, or Yet Another Resources Negotiator, is a handy tool for work planning and cluster management. It aids in improving the system’s data processing efficiency.

Reduce the size of the map

Hadoop Distributed File System (HDFS) structure and its reading process. | Download Scientific Diagram

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As previously said, Data Compression is a model that provides a Java program. It’s a framework that allows Java programs to handle data in parallel using key-value pairs. The Map job takes incoming data and transforms it into a set of data that can be used to compute the Key value combination. The Reduce task takes the output of the Map job, and then the reducer’s output generates the desired result.

Hadoop Basics

These are Java libraries used to get Hadoop up and running and other modules. It’s a collection of tools that support Hadoop’s numerous modules.

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