# Introduction In the Hadoop versions 2.0 and later, the new resource management pattern of YARN was introduced, which facilitates the cluster in terms of utilization, unified resource management and data sharing. Based on the foundation of building the Hadoop pseudo-distributed cluster, this section will let you learn the architecture, the working principle, configuration, and development and monitoring techniques of the YARN framework. This lab requires a certain Java programming foundation. Please input all the sample code in the document by yourself; do not just copy and paste as far as possible. This way can you be more familiar with the code. If you have problems, carefully review the documentation, or you can go to forum for help and communication.
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