In Amazon EMR, the key components include the
master node, core nodes, and task nodes.
The master node manages cluster operations like tracking the status and coordinating the distribution of data and tasks among other nodes.
Core nodes are responsible for storing data in the Hadoop Distributed File System (HDFS) and processing tasks.
Task nodes, on the other hand, are optional and only process data; they do not store any data.
This division of responsibilities enables efficient data processing and analysis. F
or instance, when running a big data job, the master node orchestrates the workflow, while core and task nodes work in tandem to execute tasks and compute results quickly.