Check with the Eng team that relied:
I expect that the dropbox sync is a custom component, so it would be the place to have the batching logic. The way it determined how many workflows were completed might be a bit tricky due to the multithreaded nature, but should not be hard maybe have a process step to set some property (synchronized) and check the value. This really has nothing to do with workflow as such.
Thanks for the reply. How could we determine the number of workflows which are running at a particular time. Appreciate your help here.