Large number of sources in Flink Job

[Chirag Dewan]

Hi,
I am working on a use case where my Flink job needs to collect data from 
thousands of sources. 
As an example, I want to collect data from more than 2000 File Directories, 
process(filter, transform) the data and distribute the processed data streams 
to 200 different directories.
Are there any caveats I should know with such large number of sources, also 
taking into account per operator parallelism? 
Regards,
Chirag