E-MapReduce Cluster Operation Guide - E-MapReduce
introduce how to start, stop, and restart the DataNode process on a emr-worker-1 instance. Please take the following steps:
On instances in the cluster.Click Start in the Operation column for the DataNode process running on the emr-worker-1 intance, enter record ...
Cluster specifications - E-MapReduce
, perform calculations, and run DataNode and Nodemanager. If the data volume of HDFS (3 backups) is greater than 60 TB, we. The nodes do not store data or run DataNode. You can estimate the number of instances based on CPU and memory requirements ...
What is EMR - E-MapReduce
(such as namenode, datanode, resourcemanager, and nodemanager), which make up the Hadoop cluster. The nodes running namenode and resourcemanager are known as master nodes, while those running datanode and nodemanager are called slave nodes.