Sailor: Automating Distributed Training over Dynamic, Heterogeneous, and Geo-distributed Clusters. - Foteini Strati; Zhendong Zhang; George Manos; Ixeia Sánchez Périz; Qinghao Hu 004; Tiancheng Chen; Berk Buzcu; Song Han 003; Pamela Delgado; Ana Klimovic (CoRR, 2025)