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What is Hadoop Cluster
Updated on 21st Apr, 23 50 Views

In this open-source system, the term Hadoop Cluster is quite famous due to its features and architecture which plays an important role in managing the enormous amount of data. But, what exactly is a Hadoop Cluster?  How does it work? Let’s get the answer to the most common question asked by Hadoop learners with the help of this blog.

Given below are the following topics we are going to discuss in detail:

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What is Hadoop Cluster?

A distributed data processing system called Hadoop Cluster is used to store and handle huge amounts of data. The Apache Software Foundation created it as an open-source software platform. 

Large data collections may be stored, processed, and analyzed using Hadoop Cluster. A cluster is made up of a number of interconnected computers (or nodes) that can interact with one another with the help of a network.

Since Hadoop Cluster is so highly scalable, it can handle data sets of any size and scale up or down as needed. It is fault-tolerant, which entails that even if one node fails, the other nodes may continue processing the data. Moreover, Hadoop Cluster is extremely distributed, enabling it to manage several jobs at once.

Hadoop Cluster is frequently used for large data analytics, data mining, and machine leqarning.Text With the help of this method text, music, video, photos, and other types of data can be stored and processed easily. It may be used to store and analyze information from several sources, including databases, sensors, weblogs, and other sources.

Organizations that need to swiftly and effectively process massive amounts of data should use Hadoop Cluster. Businesses that require cloud data processing and storage are also starting to use it more and more. Businesses may cut costs, enhance performance, and strengthen security by utilizing Hadoop Cluster.

Overall, Hadoop Cluster is a potent distributed data processing solution that may assist companies in more effectively storing and managing their data. It is the perfect choice for any company that wants to swiftly and effectively process massive amounts of data because of its scalability, fault tolerance, and distributed nature.

To learn more about the Hadoop framework, check out Intellipaat’s Hadoop Certification Course.

Why do we need Hadoop Cluster?

With the Hadoop distributed computing platform, large data sets may be processed and stored across computer clusters. A group of computers working together to store and analyze data using Hadoop is known as a Hadoop cluster. Many factors may influence an organization’s decision to use a Hadoop cluster, including:

  • Scalability: Hadoop clusters are easily scalable to handle massive volumes of data. More nodes can be added to the cluster as the amount of data increases to accommodate the load.
  • Fault tolerance: Hadoop is made to be resilient to errors. The system can keep running without any downtime or data loss even if a node fails. Using commodity gear, which is less expensive than specialist hardware, Hadoop clusters are constructed to be cost-effective.
  • Flexibility: Hadoop is made to operate with many forms of data, including structured, semi-structured, and unstructured data. This makes it a versatile option for a variety of data processing requirements.
  • Cost-effectiveness: Commodity hardware, which is less expensive than specialist gear, is used to build Hadoop clusters.
  • Processing speed: Hadoop is designed to handle huge datasets in batches. Hadoop can process data more quickly than conventional techniques because it distributes processing over many nodes.

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Types of Hadoop Cluster

Hadoop stores data in clusters, which are made up of many nodes that collaborate to store and analyze data. Hadoop clusters come in a variety of forms, each with special features and advantages.

  • Single-node cluster: A Hadoop cluster with only one node is known as a Single-node cluster. It is not appropriate for usage in production situations; instead, it is used for testing and development.
  • Multi-node cluster: A Hadoop cluster with many nodes is known as a multi-node cluster. It can handle big data volumes and is utilized in production situations. Data is split across several nodes in a multi-node cluster, and each node processes a different chunk of the data.
  • High Availability cluster: A special kind of multi-node cluster known as a high availability cluster offers high availability for the NameNode. There are two NameNodes in a high availability cluster, one of which is active and the other on standby. The backup NameNode takes over automatically if the active NameNode fails.
  • Hybrid cluster: A hybrid cluster combines Hadoop with additional tools like Apache Spark and Apache Storm. In a hybrid cluster, Spark and Storm are utilized for real-time processing, while Hadoop is used to store and analyze massive data volumes.
  • Cloud-based cluster: A Hadoop cluster that is hosted in the cloud is referred to as cloud-based. Since they are simple to set up, inexpensive, and scalable, based on demand, cloud-based clusters popularity is increasing in the Hadoop domain. 

Want to learn Hadoop? Read this extensive Hadoop tutorial!

Hadoop Cluster Architecture

The architecture of a Hadoop cluster consists of several components that work together to provide a robust and fault-tolerant system. These components include:

Hadoop Cluster Architecture


The Namenode is the master node that manages the entire Hadoop cluster. It is responsible for storing the metadata of the files and directories in the cluster, as well as managing the access control lists and permissions.


The Datanodes are the worker nodes in the cluster. They store the actual data in the Hadoop file system (HDFS) and are responsible for processing the data as well.

Resource Manager:

The Resource Manager is responsible for managing the resources in the cluster, including memory and CPU usage. It coordinates the allocation of resources to various applications running on the cluster.

Node Manager:

The Node Manager is responsible for managing the resources on each node in the cluster. It is responsible for starting and stopping containers that run individual applications.


Yet Another Resource Negotiator (YARN) is responsible for managing the resources for data processing frameworks like MapReduce, Spark, and Flink.

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Applications of Hadoop Cluster

Hadoop technology has been used in various applications in the past few years, such as data analysis, machine learning, and predictive analytics. Let’s go through each of its use cases individually so that you can better grasp how the Hadoop Cluster is actually put to work.

Applications of Hadoop Cluster
  • Data Storage: The Hadoop HDFS (Hadoop Distributed File System) is a system for distributing massive amounts of data among a cluster of computers. Big data management and storage are only possible when it has capability of tolerating the fault and is able to increase and decrease the size based on the requirement. 
  • Data Processing: By dividing big data sets into manageable chunks and processing them concurrently over a distributed cluster of computers, Hadoop’s MapReduce architecture enables enterprises to handle large data sets. This may help in reducing processing time and accelerating data analysis.
  • Data Analytics: Hadoop offers a strong platform for analytics of big data. Hadoop may be used by businesses to carry out difficult data analytical activities including machine learning, data mining, and predictive analytics.
  • ETL Processing: Hadoop is well suited for ETL (Extract, Transform, Load) processing activities since it can be used to process and convert huge amounts of data from many sources.
  • Data Warehousing: Large amounts of organized and unstructured data may be stored and managed using Hadoop as a data warehouse platform. It offers a more affordable option than conventional data warehousing systems.

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We hope now you got the detailed information about the Hadoop Cluster. In this blog, we have seen how important Hadoop Cluster is in the field of Big Data. Hadoop clusters offer a scalable, flexible, and powerful solution for big data analysis, and their value is expected to grow in the future as more organizations embrace this technology.

If you are still facing doubts regarding Big Data, then do post your queries on our Big Data Community Page.

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