Link to a ShenTong Database

Table 1 lists the parameters for a link to a ShenTong database.

Do not change the password or user when the job is running. If you do so, the password will not take effect immediately and the job will fail.

**Table 1** ShenTong database link parameters
Parameter	Description	Example Value
Name	Link name, which should be defined based on the data source type, so it is easier to remember what the link is for	st_link
Database Server	IP address or domain name of the database to connect Click Select next to the text box and select a ShenTong DB instance in the displayed dialog box.	192.168.0.1
Port	Port of the database to connect	3306
Database Name	Name of the database to connect	dbname
Username	Username used for accessing the database. This user must have the permissions to read and write data tables and metadata.	cdm
Password	Password of the user	-
Use Agent	The agent function will be unavailable soon and does not need to be configured.	-
Agent	The agent function will be unavailable soon and does not need to be configured.	-
Reference Sign	(Optional) Delimiter between the names of the referenced tables or columns. For details, see the product documentation of the corresponding database.	'
Driver Version	Select a driver version that adapts to the database type.	-
Fetch Size	(Optional) Displayed when you click Show Advanced Attributes. Number of rows obtained by each request. Set this parameter based on the data source and the job's data size. If the value is either too large or too small, the job may run for a long time.	1000
Link Attributes	(Optional) Click Add to add the JDBC connector attributes of multiple specified data sources. For details, see the JDBC connector document of the corresponding database. The following are some examples: connectTimeout=360000 and socketTimeout=360000: When a large amount of data needs to be migrated or the entire table is retrieved using query statements, the migration fails due to connection timeout. In this case, you can customize the connection timeout interval (ms) and socket timeout interval (ms) to prevent failures caused by timeout.	sslmode=require