Unidist on Ray

This section describes the use of unidist with the Ray execution backend.

There are two ways to choose the execution backend to run on. First, by setting the UNIDIST_BACKEND environment variable:

# unidist will use Ray
$ export UNIDIST_BACKEND=ray

import os

# unidist will use Ray
os.environ["UNIDIST_BACKEND"] = "ray"

Second, by setting the configuration value associated with the environment variable:

from unidist.config import Backend

Backend.put("ray")  # unidist will use Ray

For more information on the environment variables and associated configs specific to the Ray backend see config API section.

Unidist on Ray cluster

Currently, in order to use unidist with Ray on a cluster, Ray cluster needs to be pre-initialized. Please refer to its own documentation Ray Guide on how to set up a cluster.