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See [IOTDB-4834](https://issues.apache.org/jira/browse/IOTDB-4834).

after 1.0

https://issues.apache.org/jira/browse/IOTDB-4836

after 1.0

**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?...

我在IoTDB(0.12.5)中创建了一个时序序列,dataType:DOUBLE,encoding:PLAIN,compression:SNAPPY 里面存储的数据是每秒一个值,数据小数点后位数较长,类似这种数据,21.11077143919472、13.338655912277863 使用如下类似语句计算小时内的平均值: select AVG(e) from root.a.b.$c$d where time>=1669042800000 and time

### Discussed in https://github.com/apache/iotdb/discussions/4510 Originally posted by **lordtang** December 1, 2021 **版本信息:** 服务器版本:0.12.0 maven iotdb-session依赖版本:0.12.0 步骤: 1.导入maven依赖: ``` org.apache.iotdb iotdb-session 0.12.0 ``` 2.配置Session-pool ``` @Configuration public class IotDbConfig { @Bean...

### Search before asking - [X] I searched in the [issues](https://github.com/apache/iotdb/issues) and found nothing similar. ### Version docker run -d -p 6667:6667 -p 31999:31999 -p 8181:8181 -p 1883:1883 --name some-iotdb...

### Search before asking - [X] I searched in the [issues](https://github.com/apache/iotdb/issues) and found nothing similar. ### Version current version ### Describe the bug and provide the minimal reproduce step 多副本情况下,...

![image](https://user-images.githubusercontent.com/57204030/202674115-8844d5d5-511b-41ce-9433-0cbff16b1143.png) ![image](https://user-images.githubusercontent.com/57204030/202674409-3ecffd4e-9db4-4769-8c29-d7cd8da3ec7e.png)

iotdb版本0.13.0 现场环境iotdb集成hdfs,hdfs 3.1.4 问题描述:现场hdfs配置了kdc环境,集成hdfs用的是超级管理员hadoop用户,票据也是hadoop票据。kerberos有效期24小时。log_error.一直提示Caused by: org.ietf.jgss.GSSException: No valid credentials provided (Mechanism level: Failed to find any Kerberos tgt)的异常。hadoop环境本身是没有问题的,其他业务可以正常使用。现场自查,怀疑可能是与hdfs集成部分的没有及时获取票据,导致票据过期。

## Description In the original process, recovery in SchemaFile mode will overwrite the .pst file and redo all the plans in MLog. However, it causes unnecessary additional I/O cost. Therefore,...