Can I add multiple services in parallel to my enclave via composition?

[guisellaDes]

Can I add multiple services in parallel to my enclave via composition?

[leeederek]

Hey @guisellaDes!

Adding services in parallel is a great way to speed up how quickly your distributed system gets instantiated inside your enclave. By default, the add_services instruction adds services in parallel with a default parallelism of 4 (which can be increased with the --parallelism flag).

However, when it comes to adding multiple services from different packages, you must do so within the plan.add_services instruction with the configuration for each service in a dictionary. You cannot currently import multiple packages (using locators) and run them in parallel without using the plan.add_services instruction because the call to run each of those imported packages starts the service itself.

As an example, if you have a service_a.star file that looks like this:

def run()...

def get_config()...

Then you can add services from service_a.star in parallel into your main.star package with:

a = import_module("./service_a.star")

def run():
   a_config = a.get_config()
   plan.add_services({"a": a_config})