What is configuration of a typical slave node on Hadoop cluster? How many JVMs run on a slave node?

Single instance of a Task Tracker is run on each Slave node. Task tracker is run as a separate JVM process.Single instance of a Data Node daemon is run on each Slave node. Data Node daemon is run as a separate JVM process.One or Multiple instances of Task Instance is run on each slave node. Each task instance is run as a separate JVM process. The number of Task instances can be controlled by configuration. Typically a high end machine is configured to run more task instances.

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