1.5 node 2.2.4亿+用户数据 3. 100+用户属性 4.每天5000万+数据更新 5.Scheme变更频繁(加字段) 6.99%读延时3-5ms 生产应用-用户画像 1.Sata盘集群 平均响应时间小于80ms 2.15+ node 生产应用-历史订单 饿了么大数据平台自助化数据接口平台 1.One sql one api 2.50+ Cassandra cql

store) and I/O (the write/read throughput rate). Most workloads are best served by using less expensive SATA disks and scaling disk capacity and I/O by adding more nodes (with a lot of RAM). Solid-state drives