Description: YARN (Yet Another Resource Negotiator) is a resource management layer for Hadoop that allows multiple data processing engines to handle data stored on a single platform. It acts as a resource management system that separates data processing from storage, enabling greater flexibility and scalability in the Hadoop ecosystem. YARN manages cluster resources and assigns tasks to different nodes, thus optimizing resource usage and improving overall performance. This architecture allows different applications, such as MapReduce, Spark, and other processing frameworks, to run simultaneously on the same cluster, maximizing efficiency and reducing downtime. Additionally, YARN provides a programming interface that facilitates the creation of new applications and the integration of different technologies, making it an essential component for building Big Data solutions. Its ability to manage multiple jobs and its focus on resource efficiency have made it a standard in the large-scale data processing industry.
History: YARN was introduced in 2012 as part of Hadoop version 2.0. Its development was driven by the need to improve resource management in distributed computing environments, as the previous version, which relied solely on MapReduce, limited the ability to run different types of applications. With the advent of YARN, the execution of multiple processing frameworks was allowed, marking a significant shift in Hadoop’s architecture and its adoption in the Big Data field.
Uses: YARN is primarily used in distributed computing environments to manage resources in data processing clusters. It allows the simultaneous execution of different data processing applications, such as MapReduce, Apache Spark, and Apache Flink, thus optimizing resource usage and improving efficiency. Additionally, YARN is essential for creating applications that require intensive data processing, such as real-time analytics and machine learning.
Examples: A practical example of YARN’s use is in a data analytics company that uses Apache Spark to perform real-time analytics on large volumes of data stored in HDFS. YARN manages the cluster resources, allowing Spark and other applications to run efficiently and simultaneously, maximizing system performance. Another example is the use of YARN in machine learning platforms, where multiple training models can be run in parallel, optimizing processing time.
