Apache Hadoop


Apache Hadoop is an open-source software framework utilized for distributed storage and processing of large data sets across clusters of computers using simple programming models. The framework consists of four main modules: Hadoop Common, Hadoop Distributed File System (HDFS), Hadoop YARN, and Hadoop MapReduce. Each of these modules contributes to Hadoop’s ability to handle big data efficiently and reliably.


The phonetics of the keyword “Apache Hadoop” is: /əˈpætʃiː həˈdu:p/

Key Takeaways

<ol> <li>Apache Hadoop is a free, open-source software framework that allows for the distributed processing of large data sets across clusters of computers. This enables applications to work with thousands of nodes and petabytes of data.</li> <li>Hadoop is highly scalable and designed to detect and handle failures at the application layer, thus it provides a high level of service continuity. Its distributed computing model processes big data rapidly, making it an effective solution for businesses that need quick insights from their large data sets.</li> <li>Apache Hadoop consists of four modules: Hadoop Common (libraries and utilities used by other Hadoop modules), Hadoop Distributed File System (HDFS – a distributed file-system that stores data on the commodity machines), Hadoop YARN (a resource-management platform responsible for managing compute resources in clusters), and Hadoop MapReduce (a programming model for large-scale data processing).</li></ol>


Apache Hadoop is important in the technology field because it serves a significant role in handling big data. It is an open-source software framework that enables the processing of large datasets across clusters of computers. Developed for scalable, reliable, and distributed computing, Hadoop’s ability to store and process massive amounts of any kind of data quickly and cost-effectively makes it invaluable in today’s data-driven world. Businesses utilize it to analyze large data sets, for predicting customer trends or detecting fraud, proving its integrated part in decision-making processes. Thus, Apache Hadoop is crucial in managing big data, supporting businesses to operate efficiently and strategically.


Apache Hadoop is a highly vital technology in today’s digital world as it allows for the storage and processing of large data sets across clusters of computers. The purpose of this tool is to support businesses in dealing with massive data which cannot typically be processed using traditional data processing tools. It is designed to scale up from a single server to thousands of machines, each delivering local computation and storage capabilities. Used worldwide, Hadoop’s great advantage is its flexibility in processing different types of data, structured and unstructured, sourced from various platforms and in vast volumes.Primarily, Hadoop is utilized for big data analytics, an essential business tool of this era. The technology allows organizations to analyze large volumes of data quickly and efficiently, leading to more informed business decisions. Businesses can leverage it for customer behavior analysis, predicting trends, detecting fraud, amongst other applications. Besides analytical purposes, it is also used for data archiving and exploratory purposes. From telecommunications to social networks, the finance sector to online marketing, any field that deals with massive volumes of data can benefit from Apache Hadoop.


1. Facebook: Facebook collects and stores significant volumes of data on a daily basis. This includes data on user activities, images, videos, posts, etc. To handle this massive amount of data, Facebook uses Apache Hadoop for efficient storage and processing. Hadoop helps Facebook analyze the huge mass of data to generate insights that contribute to enhancing user experiences, delivering personalized content and ads, and improving its service offerings.2. Yahoo: Yahoo has been one of the largest and earliest adopters of Hadoop, using it to support its search engine and related advertising business. With millions of web pages indexed every day, Yahoo leverages Hadoop for web map production, spam detection, content personalization and many other aspects. 3. LinkedIn: LinkedIn processes enormous volumes of data from its over 700 million users. Apache Hadoop plays a vital role in helping the platform manage data related to user activity, job postings, professional connections, among others. It is also used in data analytics to provide tailored recommendations, targeted ads, and insights for individual users and businesses.

Frequently Asked Questions(FAQ)

**Q: What is Apache Hadoop?** A: Apache Hadoop is an open-source software framework for storing data and running applications on clusters of commodity hardware. It provides enormous data storage and faster processing power.**Q: What are the core components of Hadoop?** A: Hadoop primarily includes these four core components – Hadoop Distributed File System (HDFS), MapReduce, Yet Another Resource Negotiator (YARN), and Hadoop Common.**Q: How does Hadoop work?** A: Hadoop works by breaking down big data problems into multiple smaller data blocks, which are then processed in parallel. The results are then compiled to answer the bigger data problem.**Q: What is the role of HDFS in Hadoop?** A: HDFS or Hadoop Distributed File System is responsible for storing data in the Hadoop framework. It breaks down large data sets into smaller blocks, distributed across different nodes in a cluster.**Q: What is the use of MapReduce in Hadoop?** A: MapReduce is a programming model used in Hadoop for processing large data sets. It splits the data into multiple parts and processes them in parallel, hence enhancing the speed of data processing.**Q: What is YARN in Hadoop?** A: Yet Another Resource Negotiator (YARN) is the task scheduling component in Hadoop. It manages resources in the clusters and schedules tasks to specific nodes.**Q: What is the purpose of Hadoop Common?** A: Hadoop Common contains libraries and utilities needed by other modules within the Hadoop ecosystem. It provides the necessary tools required for the operating systems to read data stored under the HDFS.**Q: How is data stored in Hadoop?** A: Data in Hadoop is stored in a distributed manner across a cluster of machines in a redundant way. This ensures that data is protected against hardware failure and ensures high availability.**Q: Can Hadoop handle both structured and unstructured data?** A: Yes, Hadoop is designed to handle both structured and unstructured data, making it a versatile tool for big data analytics.**Q: Is it necessary to learn Java to use Hadoop?** A: While Hadoop is written in Java, it is not necessary to know Java to use Hadoop. It supports scripting languages like Python and has higher-level languages like Pig and Hive to simplify programming tasks.

Related Technology Terms

  • HDFS (Hadoop Distributed File System)
  • MapReduce
  • YARN (Yet Another Resource Negotiator)
  • Pig (Scripting Language in Hadoop)
  • HBase (NoSQL Database in Hadoop)

Sources for More Information

Table of Contents