title: what is the difference between "Token filter" and "ingest node" in elasticsearch?
body: <p>I am new in elasticsearch and I am confused with these two terms.<br>
  <b>Token filter</b> and <b>ingest node</b>. <br> They Both Turn a token to another thing, for example, a lowercase token, or etc ... and ingest node can do it too.
  Can anyone explain to me when I should use which one? Thank you a lot</p>