What is Apache hadoop yarn?
Apache Hadoop YARN (Yet Another Resource Negotiator) is a cluster management technology. It is a resource-management platform responsible for managing computing resources in clusters and using them for scheduling of users’ applications. It allows Hadoop to do more than just MapReduce data processing jobs.
YARN wasn’t part of the first versions of Hadoop, it was developed separately as a way of extending the functionality of Hadoop. It was announced in 2011 but only finally became production ready with the official Hadoop v2.x release in October 2013.
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