title: Redis and Multiple Servers
body: <p>Currently, I'm working on APIs that would be running on multiple servers.</p>
  <p>Lets say i have Application Table this table has one to many relation with Chat table.
  this chat table has the following columns:</p>
  <pre><code>Id: int primary key
  App_Token: string
  Number: int
  Content: string
  </code></pre>
  <p>The Number Column is unique only per chat. So the App_Token and Number would be a unique identifier for the Chat Entities.</p>
  <p>So i want to use Redis to cache this Number for each Application so i can use it in the other INSERT operations.</p>
  <p>My Question is Redis would be shared among the servers or not? i want to make sure that this Number won't be duplicated for the same application.</p>