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Oort

This repository contains scripts and instructions for reproducing the experiments in our OSDI '21 paper "Oort: Efficient Federated Learning via Guided Participant Selection".

If you have any questions or comments, please join our Slack channel.

Oort won the Distinguished Artifact Award at OSDI'2021!

This repo is outdated and no longer actively maintained. Instead, Oort has been merged as part of FedScale, a diverse set of challenging and realistic FL benchmark. Please try it!

Overview

• Getting Started
• Run Experiments and Validate Results
• Repo Structure
• Acknowledgements
• Contact

Getting Started

Our install.sh will install the following automatically:

• Anaconda Package Manager
• CUDA 10.2

Note: if you prefer different versions of conda and CUDA, please check comments in install.sh for details.

Run the following commands to install Oort.

git clone https://github.com/SymbioticLab/Oort
cd Oort
source install.sh 

Run Experiments and Validate Results

The output of the experiment will validate the following major claims in our evaluation (section 7 in paper):

FL Training:

1. Oort outperforms existing random participant selection by 1.2×-14.1× in time-to-accuracy performance, while achieving 1.3%-9.8% better final model accuracy (§7.2.1) -> Table 1 and Figure 9.
2. Oort achieves close-to-optimal model efficiency by adaptively striking the trade-off between statistical and system efficiency with different components (§7.2.2) -> Figure 11 and 12.
3. Oort outperforms its counterpart over a wide range of parameters and different scales of experiments, while being robust to outliers (§7.2.3) -> Figure 13, 14 and 15.

FL Testing:

1. Oort can serve developer testing criteria on data deviation while reducing costs by bounding the number of participants needed even without individual data characteristics(§7.3.1) —> Figure 16.
2. With the individual information, Oort improves the testing duration by 4.7× w.r.t. Mixed Integer Linear Programming (MILP) solver, and is able to efficiently enforce developer preferences across millions of clients (§7.3.2) -> Figure 17.

Training

Please go to ./training directory and follow the training README to run training scripts.

Testing

Please go to ./testing directory and follow the testing README to run testing scripts.

Repo Structure

Repo Root
|---- Oort        # Oort code base.
|---- training
    |---- evals     # Submit/terminate training jobs
        |---- configs   # Configuration examples
|---- testing       # Testing scripts    
    

Notes

please consider to cite our paper if you use the code or data in your research project.

@inproceedings{Oort-osdi21,
  title={Efficient Federated Learning via Guided Participant Selection},
  author={Fan Lai and Xiangfeng Zhu and Harsha V. Madhyastha and Mosharaf Chowdhury},
  booktitle={USENIX Symposium on Operating Systems Design and Implementation (OSDI)},
  year={2021}
}

Acknowledgements

Thanks to Qihua Zhou for his Falcon repo.

Contact

Fan Lai (fanlai@umich.edu) and Xiangfeng Zhu (xzhu0027@gmail.com)