title: Google App Engine datastore supports only 200 indexes
body: <p>I am a newbie to app engine datastore. I am currently evaluating to migrate my existing webapp to app engine. 
  I found that the hard limit for indexes is 200 for an application. 
  So, i am really confused whether this constraint forces many limitations on the app engine datastore design.[ for eg. no of entity kinds, no of properties in an entity] etc.</p>
  
  <p>Please advice me on this </p>