Fetch mapper data in advance for shuffle tasks#3034

Draft

hekaisheng wants to merge 5 commits intomars-project:masterfrom hekaisheng:enh/push-shuffle

+243-17

Commits on Jun 8, 2022

Push mapper data to reducers after execution

hekaisheng
authored and
xuye.qin
committed
Enable reassign_worker for reducers

继盛
authored and
xuye.qin
committed
Use tell for prefetch

hekaisheng
authored and
xuye.qin
committed
Make push mapper data work
xuye.qin
committed
Fix import
xuye.qin
committed