This topic describes how to add a task node group to an E-MapReduce (EMR) cluster.
Prerequisites
A Hadoop cluster is created. For more information, see Create a cluster.
Background information
You can add node groups to meet your requirements for different instances. For example,
you can use memory optimized instances with 1 vCPU and 8 GiB of memory to support
big data offline processing and use compute optimized instances with 1 vCPU and 2
GiB of memory to support model training.
Notice If you want to add a core node group to a Hadoop cluster, submit a ticket.
Limits
You can add a maximum of 10 task node groups to a Hadoop cluster.