title: Elasticsearch How Coordinating node works?
body: <p>I'm using Elsaticsearch Cluster(7.7 OSS Version).</p>
  <p>I'm running total 5 nodes, 2 for coordinating nodes and 3 for master &amp; data nodes.</p>
  <p>I read Elasticsearch Node Role Guide(<a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/modules-node.html#coordinating-node" rel="nofollow noreferrer">https://www.elastic.co/guide/en/elasticsearch/reference/current/modules-node.html#coordinating-node</a>)
  and it's telling that &quot;Every node is implicitly a coordinating node&quot;</p>
  <p>And I got confused, the guide means my master &amp; data nodes can be also Coordinating node too and the seperation of coordinating nodes and master &amp; data nodes becomes useless.</p>
  <p>If the coordinating nodes role is empty, then the coordinating nodes got the higher priority for processing search requests or bulk-indexing?</p>
  <p>My Coordinating node's yml file is like this</p>
  <pre><code>node.master: false
  node.data: false
  node.ingest: false
  </code></pre>
  <p>When I call _cat/nodes api, my coordinating node actually has the role 'remote_client_cluster'
  Is my coordinating nodes actually works as coordinating nodes? or works as remote_client_cluster node?</p>
  <p><a href="https://i.stack.imgur.com/nwfvS.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/nwfvS.png" alt="enter image description here" /></a></p>