Hello,

I'm not sure I understand something about transaction contention.  Does 
contention occur when two people try to update a single instance of a kind 
or does contention occur when two people try to update ANY instance of a 
kind.  I'm not a computer scientist by trade, so to be sure that I have the 
terminology correct, if I have the following code:

class MyEntity()
   data = db.SomeProperty()


def Main()
   A = MyEntity()
   B = MyEntity()

----------------------------------------
If two users simultaneously cause:
   A.put() and B.put()
to be called.

does that cause a write contention?

Thank for any clarification!

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