Creating a Connection to a Target Component

Procedure

1. Sign in to the MgC console. In the navigation pane, under Project, select your big data migration project from the drop-down list.
2. In the navigation pane on the left, choose Migrate > Big Data Verification.
3. In the Features area, click Preparations.
4. Choose Connection Management and click Create Connection.
   Figure 1 Creating a connection
   

5. Select a big data component and click Next.
6. Set parameters based on the big data component you selected.
   • Parameters for creating a connection to Doris
   • Parameters for creating a connection to HBase
   • Parameters for creating a connection to ClickHouse
   • Parameters for creating a connection to Hive Metastore

   Table 1 Parameters for creating a connection to Doris

   Parameter	Configuration
   Connection To	Select Target.
   Connection Name	The default name is Doris-4 random characters (including letters and numbers). You can also customize a name.
   MgC Agent	Select the MgC Agent installed in the source environment.
   Doris Credential	Select the target Doris credential added to the MgC Agent. For details about how to add credentials, see "Big data - Doris" in Adding Resource Credentials.
   Database IP Address	Enter the IP address for accessing the target Doris cluster. To obtain the address, log in to FusionInsight Manager, choose Cluster > Services > Doris, and check Host Where Leader Locates.
   Database Port	Enter the port for accessing the target Doris cluster. To obtain the port, log in to FusionInsight Manager, choose Cluster > Services > Doris > Configurations, and search for query_port.
   Database Name	Enter the name of the target Doris database.

   Table 2 Parameters for creating a connection to HBase

   Parameter	Configuration
   Connection To	Select Target.
   Connection Name	The default name is HBase-4 random characters (including letters and numbers). You can also customize a name.
   MgC Agent	Select the MgC Agent installed in the source environment.
   HBase Credential	Select the target HBase credential added to the MgC Agent. For details about how to add credentials, see "Big data - HBase" in Adding Resource Credentials.
   Secured Cluster	Choose whether the cluster is secured.
   ZooKeeper IP Address	Enter the IP address for connecting to the target ZooKeeper node. You can enter the public or private IP address of the ZooKeeper node.
   ZooKeeper Port	Enter the port for connecting to the target ZooKeeper node. The default value is 2181.
   HBase Version	Select the target HBase version.

   Table 3 Parameters for creating a connection to ClickHouse

   Parameter	Configuration
   Connection To	Select Target.
   Connection Name	The default name is ClickHouse-4 random characters (including letters and numbers). You can also customize a name.
   MgC Agent	Select the MgC Agent installed in the source environment.
   ClickHouse Credential (Optional)	Select the target ClickHouse credential added to the MgC Agent. For details about how to add credentials, see "Big data - ClickHouse" in Adding Resource Credentials.
   Secured Cluster	Choose whether the cluster is secured.
   ClickHouse Server IP Address	Enter the IP address of the target ClickHouse server.
   HTTP Port	If the ClickHouse cluster is unsecured, enter the HTTP port for communicating with the ClickHouse server. The default value is 8123.
   HTTP SSL/TLS Port	If the ClickHouse cluster is secured, enter the HTTPS port for communicating with the target ClickHouse server.

   Table 4 Parameters for creating a connection to Hive Metastore

   Parameter	Configuration
   Connection To	Select Target.
   Connection Name	The default name is Hive-Metastore-4 random characters (including letters and numbers). You can also customize a name.
   MgC Agent	Select the MgC Agent installed in the source environment.
   Secure Connection	Choose whether to enable secure connection. If Hive Metastore is deployed in an unsecured cluster, do not enable secure connection. If Hive Metastore is deployed in a secured cluster, enable secure connection and provide access credentials. For details about how to obtain and add credentials to MgC, see "Big data - Hive Metastore" in Adding Resource Credentials.
   Hive Version	Select the target Hive version. CAUTION: Only version 3.x is available.
   Hive Metastore IP Address	Enter the IP address for connecting to the Hive Metastore node.
   Hive Metastore Thrift Port	Enter the port for connecting to the Hive Metastore Thrift service. The default port is 9083.
   Connect to Metadata Database	During an incremental data verification, querying with Metastore on more than 30,000 partitions may lead to a memory overflow (OOM) since all partition information is loaded into memory. Connecting to the MySQL metadata database can effectively prevent this issue. If you disable this option, the system queries the information of Hive tables and partitions using Hive Metastore. If you enable this option, configure the MySQL database information. The system will query the information of Hive tables and partitions through the MySQL database. You need to set the following parameters: Metadata Database Type: Only MySQL is supported. MySQL Credential: Select the credential for accessing the MySQL database. You need to add the credential to the MgC Agent and synchronize it to MgC. For details, see Adding Resource Credentials. MySQL Node IP Address: Enter the IP address of the MySQL database server. MySQL Port: Enter the port of the MySQL database service. Database Name: Enter the name of the database that stores the Hive table metadata. NOTE: Ensure that the entered MySQL credential, node IP address, service port, and database name match the MySQL database used by Hive. Otherwise, data verification will fail.

7. Click Test. MgC verifies whether the component can be connected using the information you provided. If the test is successful, the connection can be set up.
8. After the connection test is successful, click Confirm. The connection is set up.
9. On the Connection Management page, view the created connection and its basic information. In the Operation column, click Modify to modify the connection settings.