Introduction Challenge oStorage:memory and disk oComputation:CPU o Communication:network 日卡三4元，互Q0 Li (http://cs.nju.edu.cn/lvj) Big Leamning CS.NJU 7 /115Introduction Challenge Storage: memory and disk Computation: CPU Communication: network Li (http://cs.nju.edu.cn/lwj) Big Learning CS, NJU 7 / 115