Many processes spawned for a simple ray code

For this small piece of code,

import ray

ray.init(num_cpus=1)
print('Enter something')
t = input()

Totally 7 processes are spawned. Why is this happening ? Is this intentional ?

And when I don’t set the num_cpus value, since it automatically sets to the number of cores, the processes spawned goes up from 7 to 14

I am using ray version 0.8.7 in MacOS with Python 3.7.2

[rkooo567]

Must be the dashboard if it is a head node

[wuisawesome]

Btw I checked on this and also count many processes but this is to be expected.

The python processes that I see

• reporter
• worker
• log monitor
• monitor
• reaper
• driver

I’m not sure what the 7th one you’re seeing is, but in general these are to be expected. These are all to be expected, and you shouldn’t need to worry about them (but we can point you to some references if you’re curious).

I will close this issue for now, but feel free to reopen it if this is something problematic.