Help Center/ Cloud Data Migration/ User Guide/ Creating a Link in a CDM Cluster/ Configuring Link Parameters/ OceanBase Link Parameters
Updated on 2026-07-29 GMT+08:00
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OceanBase Link Parameters

Table 1 lists the parameters for an OceanBase link.

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 OceanBase 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

OceanBase_link

Database Server

Domain name or IP address of the database server to be connected. Use semicolons (;) to separate multiple values.

192.168.0.1;192.168.0.2

Port

Port of the database to connect
  • MySQL:3306
  • Oracle:1521
  • PostgreSQL:5432
  • Microsoft SQL Server:1433
  • IBM Db2:50000

Database Name

Name of the database to connect

dbname

Username

Username used for accessing the database

When you create a database shard link, this configuration is applied to all backend links in the data source list for which no username or password has been configured. When you edit a database shard link, if you want to modify an existing backend link, specify the username and password in the data source list.

cdm

Password

Database password

When you create a database shard link, this configuration is applied to all backend links in the data source list for which no username or password has been configured. When you edit a database shard link, if you want to modify an existing backend link, specify the username and password in the data source list.

-

Reference Sign

Database enclosure character. This parameter is optional. For some databases, the value is case sensitive. Use " if no enclosure character is required.

"

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.

-

Driver Version

Different types of relational databases adapt to different drivers. For details, see How Do I Obtain a Driver?

-

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 too large or too small, the job execution time may be affected.

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:
  • socketTimeout: JDBC connection timeout duration, in milliseconds
  • mysql.bool.type.transform: whether to parse tinyint(1) to a Boolean value during data reading from a MySQL database. The default value is true.

socketTimeout=300

Link Secret Attributes

Custom secret attributes of the link

xxx=xxx