Hadoop - Node

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About

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




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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...



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