Index Shard Replication Strategies for Improving Resource Utilization in Large Scale Search Engines. - Yusen Li; Xueyan Tang; Wentong Cai 001; Jiancong Tong; Xiaoguang Liu 001; Gang Wang 001; Chuansong Gao; Xuan Cao; Guanhui Geng; Minghui Li (ICPP, 2018)