What is a container in YARN

Question

I'm new to Hadoop. So what's a container in yarn?

Answer 1

A container basically represents a resource on a single node in a given cluster.

Mr tasks run in containers. You can think of a container as a rectangular graph consisting of memory.

Answer 2

Yarn container are a process space where a given task in isolation using resources from resources pool.It's the authority of the resource manager to assign any container to applications.The assign container has a unique customerID and is always on a single node.The contaner is the resource allocation which is the succesful result of resource manager granting a specific amount of resources on a specific host.