50~100万设备. 每个设备的上传字段大概在300左右. 字段变化上传 .使用iotdb时设计时注意什么?

**Is your feature request related to a problem? Please describe.**
1. 平台大概需要承受50~100万设备. 每秒大概在1万设备上传数据.
2. 每个设备上传的传感器数据比较多大概在300左右.
3. 并不是每次上传都将所有的采集到的字段上传. 只上传其中一部分.

**Describe the solution you'd like**
1. 使用iotdb存储这类数据. root组或时间分片上需要注意什么?
2. 针对这类场景有哪些最佳实践?
3. 分布式方案目前稳定性怎么样?

**Describe alternatives you've considered**
1. 使用hbase存储过这些数据. 感觉HBase太重了.不够轻量. 一直在关注iotdb. 最近想测试使用下.

No repository files or tests are named. Start by reviewing the issue's IoTDB questions about root groups, time partitioning, partial field uploads, scale, and distributed stability; done would require a decided, project-specific recommendation rather than an implementation patch.

Written by the indexing model from the issue text.