title: Config number_of_shards and number_of_replicas in ELK
body: <p>I keep studying about ELK Stack and ran into a little problem.</p>
  <p>I have been reading all the documentation possible and it makes great emphasis on the importance of <strong>shards</strong> and <strong>replicas</strong>.
  But nowhere does it say how to configure the number of each one. I have read some site that says that it is better to leave it in automatic and others that say how to configure it in version 5.8 but that no longer works.</p>
  <p>So if someone can explain to me I would be very grateful.</p>