Hadoop - Node

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A node is a physical computer that logically run in a cluster

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Yarn Hortonworks
HDFS - DataNode

A dataNode is a HDFS process that manage storage attached to the nodes that they run on. The DataNodes are responsible for serving read and write requests from the file system’s clients. The DataNodes...
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Hadoop - Cluster

cluster in Hadoop. An cluster is group of process (generally one machine per process) called node where you will find two kind of nodes: headnodes that hosts the main process worker nodes that hosts...
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Hadoop - Edge node

An edge node is a node with the same client tools installed and configured as in the headnodes, but with no Hadoop services running. An edge node is a separate machine that isn’t used to store data...
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Hadoop - Head Node (Master node)

A head node is a node on a hadoop cluster that runs the (head|lead) services that manages the worker nodes. For example, the following process would be installed on a head node: For hdfs, the namenode...
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Hadoop - Worker Node

The worker node is a node in an hadoop cluster that host the (worker|agent) process (in contrast with the head node that hosts the leader services). For example, the following process would be installed...
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Hadoop - Zookeeper

Zookeeper is a service used to track the health of the nodes. Zookeeper keep a quorum (logic topic on machine). ZooKeeper is a coordination service for distributed applications. It provides a shared...
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Hue - Server

Hue consists of a web service that runs on a special node in your cluster. This node is known as the Hue Server. Hue can be installed on any node. For small clusters of less than 10 nodes, an existing...
Yarn Hortonworks
Yarn - Node (Worker|Agent)

A worker node in the yarn context. A node is materialized on the node machine side by the node manager process. Ie the version of the node is the version of node manager. See All nodes All...

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