title: One Redis server per Rails app?
body: <p>I've a bunch of rails app on my server that should be able to use Redis as cache engine.</p>
  
  <p>Do I've to start one instance of Redis for each of my application, or does the Redis support scoping?</p>
  
  <p>I'm worried that if I remove one value in one app, the value with the same key will be removed for all of my apps.</p>
  
  <p>I do <strong>NOT</strong> for example want this to happen.</p>
  
  <p><strong>App 1</strong><br>
  <code>Rails.cache.write("key", "value")</code></p>
  
  <p><strong>App 2</strong><br>
  <code>Rails.cache.read("key") =&gt; "value"</code></p>
  
  <p><strong>App 3</strong><br>
  <code>Rails.cache.delete("key")</code></p>
  
  <p><strong>App 1</strong><br>
  <code>Rails.cache.read("key") =&gt; nil</code></p>