1. Apache Hadoop “Apache Hadoop YARN” n.d. https://hadoop.apache.org/docs/current/hadoop‐yarn/hadoop‐yarn‐site/YARN.html. [accessed: 23‐Jan‐2021]
2. Apache Mesos “Apache Mesos” n.d. https://mesos.apache.org/. [accessed: 23‐Jan‐2021]. SM‐ n.d. is OK
3. Apache Software Foundation “Apache Lucene ” n.d. https: //lucene.apache.org/. [accessed: 25‐October‐2019].
4. Apache Spark “RDD Programming Guide” n.d.‐a http://spark.apache.org/docs/3.0.1/rdd‐programming‐guide.html. [accessed: 12‐Jan‐2021].