Hello,

I guess you are speaking about this part of the documentation: https://staging.validation.linaro.org/static/docs/v2/first-installation.html#single-master-instance-installation

In this case, all components are on the same server. So lava-server *and* lava-dispatcher are installed on the same server.

[...] In this simple mode,wheather the worker(logic unit)must only have one?
I don't understand the question. Do you speak about workers or about DUT (device under test).


Rgds

-- 
Remi Duraffort