yep. thats the plan.
i will have keys like
postid:someid/text
postid:someid/author
etc.
the relation aspect doesnt daunts me. As long as I can have a list/collection as a value, i can define a working schema.
I am more worried about if its costlier than normal dbs. and if there are any other gotchas to keep in mind as kv workers have scant documentation.