title: Reliable dictionary vs Redis Cache
body: <p>I want to implement caching for Cosmos DB data. I read about Reliable Dictionary and Redis Cache.</p>
  
  <p>I want to know:</p>
  
  <p>(1) When to use Reliable Dictionary as a caching mechanism and what is the duration and capacity of cache?</p>
  
  <p>(2) Redis cache is recommended but what is the capacity and duration of availability?</p>