Running several scan instances at a time

hi guys,
How is it possible to run several instances for simple or advanced scanning of different targets?
maybe 10 or 100 or even 1000 scanning at the same time with different targets.
definitely, i need separate report for them and i want it to be run on Ubuntu.
and i do not to use any separate hardware for it…i mean i want it to be on my own server…
thanks for your help.