yarn

https://www.ibm.com/developerworks/library/bd-yarn-intro/

https://hadoop.apache.org/docs/r2.7.2/hadoop-yarn/hadoop-yarn-site/YARN.html

http://ercoppa.github.io/HadoopInternals/HadoopArchitectureOverview.html

https://hortonworks.com/blog/apache-hadoop-yarn-resourcemanager/