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Running an FL Experiment

This tutorial will show you how to set up and start an FL experiment to train ShuffleNet on the FEMNIST dataset using FedScale.

Preliminary

Check the instructions to set up your environment and instructions to download the FEMNIST dataset.

Please make sure you are using the correct environment.

conda activate fedscale

Create Your Experiment Profile

Go to benchmark/configs/femnist/ directory and modify/create your configuration file to submit your job.

Modify the configurations such as the number of participants per round, the aggregation algorithm, the client optimizer, the training model, etc. based on your need.

Submit Your FL Job

Use fedscale driver submit [conf_yml_path] (Or python docker/driver.py submit) to submit your FL job. It will automatically launch the aggregator.py and executor.py to start the FL evaluation. You can either choose to evaluate your large-scale FL experiment over a GPU cluster or test your code on your local machine.

To stop your job:

fedscale driver stop [job_name]
# Or python docker/driver.py stop [job_name] (specified in the yml config)

Test on Your Local Machine by Submitting Config

It is more convenient to first test your code without a GPU cluster. First add an argument - use_cuda: False under job_conf in your configuration file benchmark/configs/femnist/conf.yml if you are training without using any GPU.

Set ps_ip and worker_ips to be localhost and localhost:[x] by default, where x represent how many executors you want to run on your local machine. Then run the following command to start your FL job:

python driver.py start benchmark/configs/femnist/conf.yml

Test on Your Local Machine with Jupyter Notebook

We also provide jupyter notebook examples to run your code locally. You can first start running server, and then run the client.

Evaluate on a GPU Cluster

Once you have followed the instructions to set up your experiment cluster, you will be able to submit your FL job to the cluster!

Change ps_ip and worker_ips to the host name of your nodes in the configuration file by cat \etc\hosts. For example, set 10.0.0.2:[4,4] as one of the worker_ips means launching 4 executors on each of the first two GPUs on 10.0.0.2 to train your model in a space/time sharing fashion.

Make sure the node you submit the job has access to the computation nodes. Also make sure you have synchronized the code across all the nodes. Then run the following command to submit your FL job:

fedscale driver submit [conf_yml_path] 
# Or python docker/driver.py submit benchmark/configs/femnist/conf.yml

Monitor Your Training Progress

You can find the job logging job_name under the path log_path specified in the conf.yml file. To check the training loss or test accuracy, you can do:

cat job_name_logging |grep 'Training loss'
cat job_name_logging |grep 'FL Testing'

You can also use Tensorboard to better visualize the progress.