Warning: These documents are under active 
      development and subject to change (version 2.1.0-beta).
      The latest release documents are at:
      https://purl.dataone.org/architecture
      
The /monitor collection represents various performance and utilization
metrics of Member Nodes. It is exposed by Member Nodes as part of the
MN_core API and thus must be implemented by Tier 1 Member Nodes.