README.md

[![TDengine](TDenginelogo.png)](https://www.taosdata.com/en)

# What is TDengine？

TDengine is an open-sourced big data platform under [GNU AGPL v3.0](http://www.gnu.org/licenses/agpl-3.0.html), designed and optimized for the Internet of Things (IoT), Connected Cars, Industrial IoT, and IT infrastructure and Application Monitoring. Besides the 10x faster time-series database, it provides caching, stream computing, message queuing and other functionalities to reduce the complexity and cost of development and operation.

- **10X Faster on Insert/Query Speeds**: Through the innovated design on storage, on a single-core, over 20K requests can be processed, millions of data points can be ingested, and over 10 million data points can be retrieved in a second. It is 10 times faster than other databases.

- **1/5 Hardware/Cloud Service Costs**: Compared with typical big data solutions, less than 1/5 of computing resources are required. Via column-based storage and tuned compression algorithms for different data types, less than 1/10 of storage space is needed. 

- **Full Stack for Time-Series Data**: By integrating a database with message queuing, caching, and stream computing features together, it is no longer necessary to integrate Kafka/Redis/HBase/Spark or other software. It makes system architecture simpler and more robust.

- **Powerful Data Analysis**: Whether it is 10 years or one minute ago, data can be queried just by specifying the time range. Data can be aggregated over time, multiple time streams or both. Ad Hoc queries or analyses can be executed via TDengine shell, Python, R or Matlab. 

- **Seamless Integration with Other Tools**: Telegraf, Grafana, Matlab, R, and other tools can be integrated with TDengine without a line of code. MQTT, OPC, Hadoop, Spark, and many others will be integrated soon. 

- **Zero Management, No Learning Curve**: It takes only seconds from download to install and run it successfully, there are not any dependencies. Automatic partitioning on tables or DBs. Standard SQL is used, with C/C++, Python, JDBC, Go and RESTful connectors.

# Documentation
Refer to [TDengine Documentation](https://www.taosdata.com/en/documentation/)
 for details.

# Building
Build TDengine with [CMake](https://cmake.org/) in the project directory:

```cmd
mkdir build && cd build
cmake .. && cmake --build .
```

# Running 
<!-- TDengine uses _/etc/taos/taos.cfg_ as the default configuration file. This behavior can be changed with _-c_ option. For a quick start, we will make directories structured as:
```
test/
  +--data/
  |
  +--log/
  |
  +--cfg/
      |
      +--taos.cfg
```
Then fill the configuration file _test/cfg/taos.cfg_:
```
echo -e "dataDir $(pwd)/test/data\nlogDir $(pwd)/test/log" > test/cfg/taos.cfg
``` -->
To start TDengine server, run command below in terminal:
```cmd
./build/bin/taosd -c test/cfg
```
In another terminal, use TDengine shell to connect the server:
```
./build/bin/taos -c test/cfg
```

# Installing 
After building successfully, TDengine can be installed by:
```cmd
make install
```
Users can find more information about directories installed on the system in the [file directory] section. It should be noted that installing from source code does not configure service management for TDengine.
Users can also choose to [install from packages] for it.

Start the service in the terminal.
```cmd
taosd
```

Then users can use the [TDengine shell](https://www.taosdata.com/en/getting-started/#TDengine-Shell) to connect the TDengine server.
```cmd
taos
```

If the terminal connects the server successfully, welcome messages and version info are printed. Otherwise, an error message is shown.

# Try TDengine
It is easy to run SQL commands in the terminal which is the same as other SQL databases.
```sql
create database db;
use db;
create table t (ts timestamp, a int);
insert into t values ('2019-07-15 00:00:00', 1);
insert into t values ('2019-07-15 01:00:00', 2);
select * from t;
drop database db;
```

# Developing with TDengine
TDengine provides abundant developing tools for users to develop on TDengine. Follow the links below to find different TDengine language supports.

- [Java](https://www.taosdata.com/en/documentation/connector/#Java-Connector)
- [C/C++](https://www.taosdata.com/en/documentation/connector/#C/C++-Connector)
- [Python](https://www.taosdata.com/en/documentation/connector/#Python-Connector)
- [Go](https://www.taosdata.com/en/documentation/connector/#Go-Connector)
- [RESTful API](https://www.taosdata.com/en/documentation/connector/#RESTful-Connector)

# Contribute TDengine

Please follow the [contribution guidelines](CONTRIBUTING.md) to contribute to the project.