Wait to speak until others acknowledge you. 等到别人注意到你后才开始说话。
Synchronous replication means no data loss when a JVM exits but it is slower as the primary must wait for the replicas to acknowledge they have received the change. 同步复制意味着JVM退出时,没有数据丢失,但由于主进程必须等待获得变更信息的复制品,因此速度会慢一些。