Help Center/ DataArts Studio/ User Guide/ DataArts Migration/ Creating and Managing a CDM Cluster/ Creating a CDM Cluster
Updated on 2024-08-30 GMT+08:00
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Creating a CDM Cluster

CDM provides independent clusters for secure and reliable data migration. Clusters are isolated from each other and cannot access each other.

CDM clusters can be used in the following scenarios:
  • They can be used to create and run data migration jobs.
  • They can function as agents for connecting Management Center to a data lake.

Prerequisites

You have applied for a VPC, subnet, and security group. If the CDM cluster tries to connect to another cloud service, ensure that the cluster and the cloud service are in the same VPC. Otherwise, an EIP is required.
  • If the CDM cluster and a cloud service are in the same region, VPC, subnet, and security group, they can communicate with each other through an intranet.
  • If the CDM cluster and the cloud service are in the same region and VPC but in different subnets or security groups, you must configure routing rules and security group rules. For details about how to configure routing rules, see Configuring Routing Rules. For details about how to configure security group rules, see Configuring Security Group Rules.
  • If the CDM cluster and a cloud service are in different VPCs of the same region, you can create a VPC peering connection to enable them to communicate with each other. For details about how to configure a VPC peering connection, see VPC Peering Connection

    Note: If a VPC peering connection is created, the peer VPC subnet may overlap with the CDM management network. As a result, data sources in the peer VPC cannot be accessed. You are advised to use the Internet for cross-VPC data migration, or contact the administrator to add specific routes for the VPC peering connection in the CDM background.

  • If the CDM cluster and a cloud service are located in different regions, you need to use the Internet or Direct Connect to enable them to communicate with each other. When using the Internet, ensure that an EIP has been bound to the CDM cluster, the security group of CDM allows outbound traffic from the host where the off-cloud data source is located, the host where the data source is located can access the Internet, and the connection port has been enabled in the firewall rules.
  • In addition, an enterprise project may also affect the communication between the CDM cluster and other cloud services. The CDM cluster can communicate with a cloud service only if they have the same enterprise project.

Scenario

The DataArts Studio instance contains a CDM cluster that can be used for informal scenarios such as testing and trial use.
  • If the cluster meets your needs, you do not need to buy a CDM incremental package.
  • If you need another CDM cluster that can meet your needs, buy a pay-per-use CDM incremental package.
  • If you want to reduce the costs of your CDM cluster, you can buy a CDM incremental package billed based on a package.

Due to specifications restrictions, the free CDM cluster provided by a DataArts Studio instances can only be used for informal scenarios such as testing and trial use. To run your migration workloads, buy a CDM incremental package. In addition, you are not advised to use a CDM cluster that serves as a data connection agent to run data migration jobs.