Check Before Use

Before creating a real-time synchronization task in DataArts Migration, you must check the items listed in the following table to ensure that the environment meets the requirements of the task.

**Table 1** Check items
Item	Description	Preparation
Relevant service components	DataArts Migration depends on the following components: cdm-instance 851, dps-agent 851, migration-engine 851, migration-resource 851, and DLF 851, and later versions of these components. Supported MRS cluster versions: 330, 350, and 351	Upgrade related service components to their available versions.
Account and permissions	Create a user and authorize the user to use DataArts Migration.	See Authorizing the Use of Real-Time Data Migration.
Real-time computing resource group	You need to the compute resources required by the real-time migration task.	See Buying a DataArts Migration Resource Group Incremental Package. See Associating a Real-Time Migration Resource Group with Workspaces.
Databases	Prepare the source and destination databases and the corresponding connection account permissions. NOTE: You are advised to create an independent database account for the connection of the migration task to prevent task failures caused by account modification. After changing the account passwords for the source or destination databases, modify the connection information in the migration task as soon as possible to prevent automatic retry after a task failure. Automatic retries will lock the database accounts.	The required permissions vary depending on the link and database. For details, see Tutorials.
Connections	Create data connections in DataArts Studio Management Center. NOTE: When creating a data connection, you must select DataArts Migration for Applicable Modules. The agent used in a data connection is a CDM cluster. You must upgrade the cluster to a later version to meet function and feature requirements. For details, contact the customer service or technical support.	For details, see Configuring DataArts Studio Data Connection Parameters.
Network communications	Enable network communications between the resource group, migration source, and migration destination.	For details, see FAQ: descriptions of enabling ports of the data source security group. There are additional network constraints for some data sources. For details, see data source constraints.