FedML Parrot: A Scalable Federated Learning System via Heterogeneity-aware Scheduling on Sequential and Hierarchical Training. - Zhenheng Tang; Xiaowen Chu 001; Ryan Yide Ran; Sunwoo Lee 001; Shaohuai Shi; Yonggang Zhang 003; Yuxin Wang 003; Alex Qiaozhong Liang; Salman Avestimehr; Chaoyang He 001 (CoRR, 2023)