Description: The History of YARN Applications provides a way to view historical data of applications that have run on the YARN cluster. YARN, which stands for Yet Another Resource Negotiator, is a key component of the Hadoop ecosystem that enables efficient resource management and task scheduling in computing clusters. Its modular design allows users to run multiple applications on the same cluster, thereby optimizing resource usage and improving scalability. Through the History of YARN Applications, administrators can access detailed information about application performance, resource usage, and other critical parameters, facilitating informed decision-making for cluster management. This functionality is essential for monitoring and optimizing applications, allowing users to identify bottlenecks and improve operational efficiency. Additionally, the ability to store and analyze historical data provides a solid foundation for future planning and continuous improvement of applications running in the YARN environment.
History: YARN was first introduced in 2012 as part of Hadoop version 2.0, aiming to overcome the limitations of the original MapReduce programming model. Before YARN, Hadoop could only run MapReduce jobs, which limited its flexibility and ability to handle different types of applications. With the advent of YARN, the execution of various applications, such as Spark and Tez, on the same cluster was enabled, marking a significant shift in Hadoop’s architecture.
Uses: YARN is primarily used to manage resources in computing clusters, allowing multiple applications to run simultaneously. This includes executing data processing jobs, real-time analytics, and machine learning applications. Additionally, YARN facilitates task scheduling and efficient resource allocation, which is crucial for big data environments.
Examples: An example of YARN’s use is its implementation in companies like Yahoo and Facebook, where it is used to process large volumes of data and run analytics applications. Another case is the use of YARN with Apache Spark, which allows users to perform real-time data analytics on large datasets stored in distributed systems.
