Run Data Run! Re-Distributing Data via Piggybacking for Geo-Distributed Data Analytics. - Yefei Li; Yibo Jin 001; Haiyang Chen; Wenchao Xi; Mingtao Ji; Sheng Zhang 001; Zhuzhong Qian; Sanglu Lu (ISPA/BDCloud/SocialCom/SustainCom, 2019)