TDengine is an open-sourced big data platform under GNU AGPL v3.0, designed and optimized for the Internet of Things (IoT), Connected Cars, Industrial IoT, and IT Infrastructure and Application Monitoring.
Questions tagged [tdengine]
345 questions
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new user cann't login when using TDengine cluster
I have a TDengine cluster with 3 nodes.
I created a new user with a sql:
CREATE USER pctech PASS 'password' SYSINFO 1;
Success.
However, I failed to login with the new user. Then I changed the password.
ALTER USER pctech PASS 'pctech';
The issue…
JamesLiu
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java.sql.SQLException: connect error when connecting to TDengine database
I'm trying Druid to connect TDengine.
url jdbc:TAOS-RS://127.0.0.1:6041/test?user=xxx&password=xxxx
Then I got the following error:
java.sql.SQLException: connect error
If I use JDBC directly, it's ok. What may be the problem?
superman
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java.lang.UnsatisfiedLinkError when using JDBC connector of TDengine
I'm using TDengine in my iot project. I tried to connect TDengine with JDBC in my code.
I encountered an error:
Exception in thread "main" java.lang.UnsatisfiedLinkError: no taos in java.library.path
I tried some steps according to its documents,…
Shawn
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1 answer
Could not find module taos while using TDengine connector
I'm using TDengine database to process time-series data. My application is developed by Python.
I imported the Python connector of TDengine. I encountered an error while loading the python module.
taos.error.InterfaceError: [0xffff]: unable to load…
Beomann
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Can the memory footprint of TDengine be limited by parameters? I
I'm using TDengine database. The data will increase 200 million per day,but the memory usage is growing by about 50MB accordingly.I'm a little concerned about the amount of resources being used.
I have searched the development documentation and…
JamesLiu
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why my Grafana couldn't connect to TDengine database
GF_VERSION=3.2.2
from GitHub
wget https://github.com/taosdata/grafanaplugin/releases/download/v$GF_VERSION/tdengine-datasource-$GF_VERSION.zip
from Grafana
wget -O tdengine-datasource-$GF_VERSION.zip…
Yu Chen
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module has no attribute when using TDengine Python connector
I deploy my time-series processing project with docker. The database is TDengine. I used its Python connector. I tested it on my Linux server, and everything is OK.
However, when I switch my application to docker, there is something wrong.
It is…
JamesLiu
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Can we change the log level of TDengine dynamicly?
I'm running a 3-nodes TDengine database cluster. There is too many logs during runtime.
How can I confirm the current log level? Can it be modified dynamically?
JamesLiu
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java.lang.UnsatisfiedLinkError when using JDBC to connect TDengine
When I use springboot+mybatis to connect TDengine, there is an exception:
java.lang.UnsatisfiedLinkError: 'com.taosdata.jdbc.TSDBException com.taosdata.jdbc.TSDBJNIConnector.setConfigImp(java.lang.String)'
My environment:
System: MacOS
TDengine…
superman
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1 answer
Does TDengine Python connector support executemany?
I'm currently using TDengine and Python to store time-series data.
I tried Python connector.
conn = taos.connect()
conn.execute(“…”)
It’s OK. However, the performance is not very good. Does TDengine Python connector support executemany and…
JamesLiu
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"no enough memory in dnode " in TDengine database
I have enough memory but why it show me "no enough memory in dnode ?"
detail ：
After changing supportVnode parameter ，I create a new database，it show me "no enough memory in dnode
but actually, my server still has 70% RAM.
My TDengine database…
Yu Chen
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- 5
0
votes
1 answer
No write permission when inserting data to TDengine
I'm using JDBC to read/write data from/to TDengine database. Linux server.
When executing insert statement, I got an error report.
Cause: java.sql.SQLException: TDengine ERROR (80000214): No write permission
I googled the error message, but got no…
superman
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1 answer
Use Data Subscription through python in TDengine
I'm trying data subscription feature of TDengine.
I tested its Python demo.
from taos.tmq import TaosConsumer
# Syntax: `consumer = TaosConsumer(*topics, **args)`
#
# Example:
consumer = TaosConsumer('topic1', 'topic2', td_connect_ip = "127.0.0.1",…
JamesLiu
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0
votes
1 answer
fail to create db in TDengine
I want to create a new database called weathersensors. The SQL statement is:
CREATE DATABASE `weathersensors` KEEP 15 DURATION 1 PRECISION 'ms';
Then it report an error:
Out of dnode
I can't tell what is the root cause.
I tried show dnodes, but…
superman
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0
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1 answer
Is there a way to get the latest data of 10,000 tables in TDengine?
I have a supertable called sdata in TDengine database, 10,000 subtables to store the data from 10,000 IoT sensors. I named the tables data_1,data_2 ...
I want to take the latest data of each point when I initialize the service. Of course, I can…
JamesLiu
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