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IoTDB (Internet of Things Database) is an integrated data management engine designed for time series data, which can provide users specific services for data collection, storage and analysis. Due to its light weight structure, high performance and usable features together with its intense integration with Hadoop and Spark ecology, IoTDB meets the requirements of massive dataset storage, high-speed data input and complex data analysis in the IoT industrial field.
IoTDB's features are as following:
For the latest information about IoTDB, please visit our IoTDB official website.
This short guide will walk you through the basic process of using IoTDB. For a more-complete guide, please visit our website's User Guide.
To use IoTDB, you need to have:
IoTDB provides you three installation methods, you can refer to the following suggestions, choose one of them:
Here in the Quick Start, we give a brief introduction of using source code to install IoTDB. For further information, please refer to Chapter 4 of the User Guide.
You can download the source code from:
git clone https://github.com/apache/incubator-iotdb.git
Under the root path of incubator-iotdb:
> mvn clean package -DskipTests
Then the binary version (including both server and client) can be found at distribution/target/apache-iotdb-{project.version}-incubating-bin.zip
NOTE: Directories "service-rpc/target/generated-sources/thrift" and "server/target/generated-sources/antlr3" need to be added to sources roots to avoid compilation errors in IDE.
configuration files are under "conf" folder
iotdb-env.bat
, iotdb-env.sh
),tsfile-format.properties
, iotdb-engine.properties
)logback.xml
).For more, see Chapter3: Server and Chapter4: Client in detail.
You can go through the following step to test the installation, if there is no error after execution, the installation is completed.
Users can start IoTDB by the start-server script under the sbin folder.
# Unix/OS X
> sbin/start-server.sh
# Windows
> sbin\start-server.bat
IoTDB offers different ways to interact with server, here we introduce basic steps of using Cli tool to insrert and query data.
After installing IoTDB, there is a default user 'root', its default password is also 'root'. Users can use this default user to login Cli to use IoTDB. The startup script of Cli is the start-client script in the folder sbin. When executing the script, user should assign IP, PORT, USER_NAME and PASSWORD. The default parameters are "-h 127.0.0.1 -p 6667 -u root -pw -root".
Here is the command for starting the Cli:
# Unix/OS X
> sbin/start-client.sh -h 127.0.0.1 -p 6667 -u root -pw root
# Windows
> sbin\start-client.bat -h 127.0.0.1 -p 6667 -u root -pw root
The command line client is interactive so if everything is ready you should see the welcome logo and statements:
_____ _________ ______ ______
|_ _| | _ _ ||_ _ `.|_ _ \
| | .--.|_/ | | \_| | | `. \ | |_) |
| | / .'`\ \ | | | | | | | __'.
_| |_| \__. | _| |_ _| |_.' /_| |__) |
|_____|'.__.' |_____| |______.'|_______/ version x.x.x
IoTDB> login successfully
IoTDB>
Now, let us introduce the way of creating timeseries, inserting data and querying data.
The data in IoTDB is organized as timeseries, in each timeseries there are some data-time pairs, and every timeseries is owned by a storage group. Before defining a timeseries, we should difine a storage group using SET STORAGE GROUP, and here is an example:
IoTDB> SET STORAGE GROUP TO root.ln
We can also use SHOW STORAGE GROUP to check created storage group:
IoTDB> SHOW STORAGE GROUP
+-----------------------------------+
| Storage Group|
+-----------------------------------+
| root.ln|
+-----------------------------------+
storage group number = 1
After the storage group is set, we can use CREATE TIMESERIES to create new timeseries. When we create a timeseries, we should define its data type and the encoding scheme. We create two timeseries as follow:
IoTDB> CREATE TIMESERIES root.ln.wf01.wt01.status WITH DATATYPE=BOOLEAN, ENCODING=PLAIN
IoTDB> CREATE TIMESERIES root.ln.wf01.wt01.temperature WITH DATATYPE=FLOAT, ENCODING=RLE
Inorder to query the specific timeseries, we can use SHOW TIMESERIES . represent the path of the timeseries. Its default value is null, which means quering all the timeseries in the system(the same as using "SHOW TIMESERIES root"). Here are the examples:
IoTDB> SHOW TIMESERIES
+-------------------------------+---------------+--------+--------+
| Timeseries| Storage Group|DataType|Encoding|
+-------------------------------+---------------+--------+--------+
| root.ln.wf01.wt01.status| root.ln| BOOLEAN| PLAIN|
| root.ln.wf01.wt01.temperature| root.ln| FLOAT| RLE|
+-------------------------------+---------------+--------+--------+
Total timeseries number = 2
IoTDB> SHOW TIMESERIES root.ln.wf01.wt01.status
+------------------------------+--------------+--------+--------+
| Timeseries| Storage Group|DataType|Encoding|
+------------------------------+--------------+--------+--------+
| root.ln.wf01.wt01.status| root.ln| BOOLEAN| PLAIN|
+------------------------------+--------------+--------+--------+
Total timeseries number = 1
Insert timeseries data is the basic operation of IoTDB, you can use ‘INSERT’ command to finish this. Before inserting you should assign the timestamp and the suffix path name:
IoTDB> INSERT INTO root.ln.wf01.wt01(timestamp,status) values(100,true);
IoTDB> INSERT INTO root.ln.wf01.wt01(timestamp,status,temperature) values(200,false,20.71)
The data we’ve just inserted displays like this:
IoTDB> SELECT status FROM root.ln.wf01.wt01
+-----------------------+------------------------+
| Time|root.ln.wf01.wt01.status|
+-----------------------+------------------------+
|1970-01-01T08:00:00.100| true|
|1970-01-01T08:00:00.200| false|
+-----------------------+------------------------+
Total line number = 2
We can also query several timeseries data at once like this:
IoTDB> SELECT * FROM root.ln.wf01.wt01
+-----------------------+--------------------------+-----------------------------+
| Time| root.ln.wf01.wt01.status|root.ln.wf01.wt01.temperature|
+-----------------------+--------------------------+-----------------------------+
|1970-01-01T08:00:00.100| true| null|
|1970-01-01T08:00:00.200| false| 20.71|
+-----------------------+--------------------------+-----------------------------+
Total line number = 2
The commands to exit the Cli is:
IoTDB> quit
or
IoTDB> exit
For more on what commands are supported by IoTDB SQL, see Chapter 5: IoTDB SQL Documentation.
The server can be stopped with ctrl-C or the following script:
# Unix/OS X
> sbin/stop-server.sh
# Windows
> sbin\stop-server.bat
Under the root path of incubator-iotdb:
> mvn clean package -pl server -am -DskipTests
After build, the IoTDB server will be at the folder "server/target/iotdb-server-{project.version}".
Under the root path of incubator-iotdb:
> mvn clean package -pl client -am -DskipTests
After build, the IoTDB client will be at the folder "client/target/iotdb-client-{project.version}".
SET STORAGE GROUP TO root.fit.d1;
SET STORAGE GROUP TO root.fit.d2;
SET STORAGE GROUP TO root.fit.p;
CREATE TIMESERIES root.fit.d1.s1 WITH DATATYPE=INT32,ENCODING=RLE;
CREATE TIMESERIES root.fit.d1.s2 WITH DATATYPE=TEXT,ENCODING=PLAIN;
CREATE TIMESERIES root.fit.d2.s1 WITH DATATYPE=INT32,ENCODING=RLE;
CREATE TIMESERIES root.fit.d2.s3 WITH DATATYPE=INT32,ENCODING=RLE;
CREATE TIMESERIES root.fit.p.s1 WITH DATATYPE=INT32,ENCODING=RLE;
Time,root.fit.d1.s1,root.fit.d1.s2,root.fit.d2.s1,root.fit.d2.s3,root.fit.p.s1
1,100,'hello',200,300,400
2,500,'world',600,700,800
3,900,'IoTDB',1000,1100,1200
# Unix/OS X
> tools/import-csv.sh -h <ip> -p <port> -u <username> -pw <password> -f <xxx.csv>
# Windows
> tools\import-csv.bat -h <ip> -p <port> -u <username> -pw <password> -f <xxx.csv>
csvInsertError.error
# Unix/OS X
> tools/export-csv.sh -h <ip> -p <port> -u <username> -pw <password> -td <directory> [-tf <time-format>]
# Windows
> tools\export-csv.bat -h <ip> -p <port> -u <username> -pw <password> -td <directory> [-tf <time-format>]
select * from root.fit.d1
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