title: how to run multiple ansible plays in parallel?
body: <p>I have a playbook with multiple plays:</p>
  
  <pre><code>---
  - hosts: druid-realtime-1
    sudo: true
    roles:
    - { role: druid-realtime, du_rt_id: 1 }
  
  - hosts: druid-realtime-2
    sudo: true
    roles:
    - { role: druid-realtime, du_rt_id: 2 }
  </code></pre>
  
  <p>How do I tell ansible to run both plays in parallel instead of one after another?</p>