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Questions tagged [iotdb]

Apache IoTDB (Database for Internet of Things)

"Apache IoTDB (Database for Internet of Things) is an IoT native database with high performance for data management and analysis, deployable on the edge and the cloud. Due to its light-weight architecture, high performance and rich feature set together with its deep integration with Apache Hadoop, Spark and Flink, Apache IoTDB can meet the requirements of massive data storage, high-speed data ingestion and complex data analysis in the IoT industrial fields."

Source: https://iotdb.apache.org/

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Why the datanode status reflected unknown when trying to join cluster after removing?

After I used the "remove-datanode [DataNodeID]" script to remove a datanode in Apache IoTDB, IoTDB prompted successfully removed. I deleted all the contents in the datanode directory, and then started it to join the cluster. After joining, the…
Hester Tso
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How can Apache IoTDB query discontinuous data and to only keep one copy of duplicated data?

I wonder if Apache IoTDB can directly query discontinuous data within a certain period of time, that is, to keep only one copy if the data is duplicated? Now I need to query 30,000 time series at one time, and right know it is too slow to query them…
NKZ
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Can I import the data exported from the relational database into the Apache IoTDB?

Can I import the data exported from the relational database into the Apache IoTDB? I just came across iotdb, I've been using a relational database before, and now I want to switch to iotdb.So know I need to import the data from the relational…
NKZ
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Why Apache IoTDB reported “can't allow more query tasks” when resources are not full?

I am currently using Apache IoTDB Version 1.1.0 and found a problem. When I tried to use "show queries" command, an error message appears: "Msg: 301: The system can't allow more query tasks." I checked the computing resources and seems like it is…
zx shen
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How to set the root name of Apache IoTDB that has number sets in it?

I have a question when I am reading official guide of Apache IoTDB. The document says: In Version 1.0, identifiers quoted without backticks are not allowed to be real numbers, and are only allowed to contain letters, characters, and underscores. I…
Thoreau I
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How to speed up the conversion of data using SessionDataSetWrapper to map format?

After reading the data in Apache IoTDB, I tried to traverse the data using SessionDataSetWrapper to "map" fromat. It takes about 4 seconds to transfer 30,000 time series data. Please tell me is there any way to optimize this conversion? Or is there…
Maggie47
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Why Apache IoTDB prompted "tsfile is empty or incomplete" while the resource file is complete?

I am now trying to load the tsfile of Apache IoTDB Version 0.13.3 into Version 1.1.0, and a message prompted: Msg: 701: .. tsfile is empty or incomplete. The output information of IoTDB server prompted: Invalid input: 24. I also checked the…
NKZ
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How long should Apache IoTDB took to not report "may not ready now" after startup?

I am a newbie to Apache IoTDB and I am trying to install IoTDB, but during the startup process it kept warning "may not ready now, please wait and retry later". How to deal with this error? It has been reporting this error for more than half an…
ColdWing
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When shut down all nodes in one region of Apache IoTDB, how will the partition with this region be transferred?

If there are 6 nodes in the cluster of Apache IoTDB Version 1.0, namely Node1, Node2, Node3, Node4, Node5, Node6, and the number of ConfigNodes I set is 3. If the partition with RegionID 1 is for Node1, Node2, and Node3, when I shut down Node1,Node2…
jialin
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When will Apache IoTDB clean up historical data after TTL is set to certain value?

May I ask how long it will take for the expired historical data to be automatically cleared after the TTL is set to a time value in Apache IoTDB V0.13.3? Also, if I currently set TTL=1, are the historical data before that 1 day will be cleaned up…
zx shen
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Why reported the path does not exist when automatically generating time series in Apache IoTDB?

I am now using Apache IoTDB Version 0.13 to automatically generate time series. However IoTDB still report that the path does not exist when writing data? I already set data to existing paths when setting automatic writing process, so why this…
Hao Ling
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How to remain the files of Apache IoTDB when the system is abnormally powered off?

I discovered a question related to Apache IoTDB. When the Cluster Version of IoTDB is abnormally powered off, some of the data files are always damaged. Sometimes are the resource files reported error, and sometimes are the tsfile reported error.…
Thoreau I
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What configuration do I need to set or change after migrating data to Version 1.0.0/1.1.0 of Apache IoTDB?

May I ask how to migrate the data of Apache IoTDB from Version 0.13.2 to Version 1.0.0 or 1.1.0? I checked the previous answers and know that I may need to use "load" command, but I'm still a little confused. Does this mean to directly load the…
user21515202
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How to get the unaligned data of multiple measurement points in Apache IoTDB?

I checked the official guide of Apache IoTDB, and it seems like most of the examples are based on the time series are aligned. I wonder if the time series are not aligned, is there a way to query out the data values of multiple measurement…
user21515202
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How to rename the name of time series in Apache IoTDB?

Can Apache IoTDB rename the name of time series? Now I may need to change the name of time series later, but the data corresponding to different time series remains the same. If this time series name can be changed, how should I do that? Does anyone…
user21515202
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