doc-exports/docs/mrs/component-operation-guide-lts/mrs_01_24743.html

Configuring an IoTDB Data Source

This section applies to MRS 3.2.0 or later.

Scenario

Add an IoTDB JDBC data source on HSConsole of a cluster in security mode.

Prerequisites

• The domain name of the cluster where the data source is located must be different from that of the HetuEngine cluster.
• The cluster where the data source is located and the HetuEngine cluster nodes can communicate with each other.
• A HetuEngine compute instance has been created.
• By default, SSL is enabled for the IoTDB service in a security cluster. After SSL is enabled, you need to upload the truststore.jks file. For details about how to obtain the file, see Using the IoTDB Client.

Procedure

1. Log in to FusionInsight Manager as a HetuEngine administrator and choose Cluster > Services > HetuEngine.
2. On the Dashboard tab page that is displayed, find the Basic Information area, and click the link next to HSConsole WebUI.
3. Choose Data Source and click Add Data Source. Configure parameters on the Add Data Source page.
   1. In the Basic Configuration area, configure Name and choose JDBC > IoTDB for Data Source Type.
   2. Configure parameters in the IoTDB Configuration area by referring to Table 1.

      Table 1 IoTDB configuration parameters

      Parameter	Description	Example Value
      Driver	The default value is iotdb.	iotdb
      JDBC URL	JDBC URL for connecting to IoTDB. Format: jdbc:iotdb://Service IP address 1 of IoTDBServer:Port number,Service IP address 2 of IoTDBServer:Port number	jdbc:iotdb://10.10.10.11:22260,10.10.10.12:22260
      Username	IoTDB username for connecting to the IoTDB data source	NOTE: If the cluster where IoTDB resides is in non-security mode, set this parameter to the default IoTDB user root.
      Password	Password of the IoTDB username for connecting to the IoTDB data source	NOTE: If the cluster where the IoTDB service is installed is in non-security mode, obtain the password of user root from the administrator of this cluster.
      Enable SSL	Whether SSL is enabled for the IoTDB service. SSL is enabled by default in a security cluster.	Yes
      truststore File	After SSL is enabled for IoTDB, upload the truststore.jks file.	-

      

      • Service IP addresses of IoTDBServer:

        Log in to FusionInsight Manager, choose Cluster > Services > IoTDB. On the page that is displayed, click the Instance tab. On this tab page, check Service IP Address of IoTDBServer.

      • Port number:

        Log in to FusionInsight Manager, choose Cluster > Services > IoTDB. On the page that is displayed, click the Configurations tab. On this tab page, search for and check the value of IOTDB_SERVER_RPC_PORT. The default value is 22260.

   3. (Optional) Add custom configurations as needed.
   4. Click OK.

4. Log in to the node where the cluster client is located and run the following commands to switch to the client installation directory and authenticate the user:

   cd /opt/client

   source bigdata_env

   kinit User performing HetuEngine operations (If the cluster is in normal mode, skip this step.)

5. Run the following command to log in to the catalog of the data source:

   hetu-cli --catalog Data source name --schema Database name

   For example, run the following command:

   hetu-cli --catalog iotdb_1 --schema root.ln

6. Run the following command. If the database table information can be viewed or no error is reported, the connection is successful.

   show tables;

Data Type Mapping

IoTDB Data Type	HetuEngine Data Type
BOOLEAN	BOOLEAN
INT32	BIGINT
INT64	BIGINT
FLOAT	DOUBLE
DOUBLE	DOUBLE
TEXT	VARCHAR

Function Enhancement

• IoTDB can confgiure any label fields for time series. These IoTDB label fields and other data sources can be jointly queried through HetuEngine.
• Any nodes that are stored by IoTDB to the time series can be used as tables for data query on HetuEngine.

Constraints

• IoTDB data cannot be created but can be queried.
• The IoTDB user who uses HetuEngine for query must at least be configured with the read permission on the root directory.

Parent topic: Configuring Data Sources