Go through official docs

• For the official docs of Yarn node label, plase see here.

Overview

• Node label is a way to group nodes with similiar characteristics and applications can specify where to run.
• Now only node partition is supported, which is:
  • One node can have only one node partition, so a cluster is partitioned to serveral disjoint sub-clusters by node partitions.
  • User need to configure how much resources of each partition can be used by different queues.
  • There are two kinds of node partitions:
    • Exclusive: containers will be allocated to nodes with exactly match node partition.
    • Non-exclusive: if a partition is non-exclusive, it shares idle resource to container request DEFAULT partition.

Features

<Yarn><Node Labels>

原文：http://www.cnblogs.com/wttttt/p/7562836.html