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      CDM

      See Cloud Data Migration

      CDM Cluster

      See Cloud Data Migration cluster

      Cloud Data Migration

      Cloud Data Migration (CDM) implements data mobility by enabling data migration among homogeneous and heterogeneous data sources. It supports on-premises and public-cloud-based data sources.

      Cloud Data Migration cluster

      A CDM cluster is a CDM instance that you have purchased. It consists of one or multiple VMs. Data of different CDM clusters are isolated. You can purchase multiple CDM clusters to isolate data access among different departments.

      Connector

      A connector is a built-in object template used for connecting to a data source. Currently, CDM uses connectors to connect to OBS, MRS, and databases. New connectors can be added to CDM as well.

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        Destination job configuration

        During job creation, a destination link specifies the data source where the data is to be loaded, for example, a table or directory. The destination job parameter settings vary with destination links. You can set related parameters in the destination job configuration.

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          Job

          A job is a data migration task that you have created to migrate data from a specific data source to another. To create a job, you must specify a source link, destination link, and field mapping rule.

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            Link

            A link is an object set up based on a connector and is used to connect to a specific data source. To create a link, you must specify the link name, connector type, data source address, and authentication information. For example, to connect to a MySQL database, you must set the host IP address, port number, username, and password. After a link is set up, it can be used by multiple jobs as either a source or a destination link.

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              Mapping

              During job creation, especially jobs of migrating data between heterogeneous data sources, you must configure the mappings between the source and destination data sources, such as field mapping and field type mapping.

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                Source job configuration

                During job creation, a source link specifies the data source where the data is to be extracted, for example, a table or directory. The source job parameter settings vary with source links. You can set related parameters in the source job configuration.