title: How to compare the performance of mongoDb with CosmosDb on Azure cloud?
body: <p>I have a mongoDb instance provisioned on Azure cloud used as IAAS. There is a load balancer behind which there is a shard cluser, each shard has 2 replicas. Each replica is a VM. So I can go inside that VM and check the storage space, RAM etc and check on the hardware details for that VM.</p>
  
  <p>Now, I have cosmosDb provisioned as well which is actually a managed service and I have no control over what it uses behind the hoods. For example, I would not know how much RAM, what storage space etc is used.</p>
  
  <p>So if I have to compare the performance of mongoDb and cosmosDb on azure cloud, I am not sure how to compare apples to apples if I don't have the exact information about the underlying hardware.</p>
  
  <p>Can someone suggest a way I can compare the performance of the two ?</p>