title: One database per COSMOS instance or multiple databases in single COSMOS instance?
body: <p>We are new to COSMOS and migrating our multiple applications to cloud. What would be the pros &amp; cons if we have one database per COSMOS instance or all applications databases in single COSMOS instance, will that be cost effective? Because if Microsoft bill on usage RU/s and storage, and not on how many instances of COSMOS are running, what difference it will make to have single database in each COSMOS instance?</p>
  
  <p>Example-
  Approach A :
  COSMOS Resource1 > Database1 > Container1
  COSMOS Resource1 > Database2 > Container2
  Approach B:
  COSMOS Resource1 > Database1 > Container1
  COSMOS Resource2 > Database2 > Container2</p>
  
  <p>Which approach is better?</p>