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hadoop - What is a container in YARN?

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hadoop - What is a container in YARN?

What is a container in YARN? Is it same as the child JVM in which the tasks on the nodemanager run or is it different?

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It represents a resource (memory) on a single node at a given cluster.
A container is

  • supervised by the node manager
  • scheduled by the resource manager

One MR task runs in such container(s).


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