anchor.diff:  These operations are I/O-, memory-, and CPU-intensive. It is important to
   monitor these resources and to add more data nodes if they are overloaded.
   
  -The main benefit of having dedicated data nodes is the separation of the
  -master and data roles.
  +The main benefit of having dedicated data nodes is the separation of the master
  +and data roles.
   
   To create a dedicated data node in the {default-dist}, set:
   [source,yaml]
  
positive.code: default behavior in the {es} {default-dist}. If you want to use {ml-features},
  there must be at least one {ml} node in your cluster. For more information about
  {ml-features}, see
  {ml-docs}/xpack-ml.html[Machine learning in the {stack}].
  +
  IMPORTANT: If you use the {oss-dist}, do not set `node.ml`. Otherwise, the node
  fails to start.
  
negative.code: -------------------
  <1> The default for `node.voting_only` is `false`.
  
  IMPORTANT: The `voting_only` role requires the {default-dist} of {es} and is not
  supported in the {oss-dist}. If you use the {oss-dist} and set
  `node.voting_only` then the node will fail to start.  Also note that only
  master-eligible nodes can be marked as voting-only.
  
  