Connect Nifi to serveral servers or several data sources at the same time

[#1]

If I have several data sources on the same server can I configure ListSFTP and FetchSFTP to collect the data at the same time? if yes how can we do it.
If I have several servers on which I have to collect data, can I configure ListSFTP and FetchSFTP to collect the data at the same time? if yes how can we do it.

[#2]

If you have multiple data sources then you can create a processor for each and have them aggregate in a central processor/group. In the picture below we have 6 different data sources (API's, FTP's, etc), each in its own processor group. Within their respective groups they reformat the data so that it is uniform and send it on its way.

I had to blank out some text but this should give you the idea.