Overview

Before creating a DRS task, make preparations given in the following table to meet the environment requirements.

**Table 1** Preparations
Item	Description	Reference
Account	Prepare a Huawei account, create a user, and grant permissions to the user to use DRS.	For details, see Registering a Huawei ID and Enabling Huawei Cloud Services. Register an account by referring to Permissions Management.
Database	Prepare the source and destination databases with required account permissions. NOTE: You are advised to create an independent database account for DRS task connection to prevent task failures caused by account modification. After changing the account passwords for the source and destination databases, modify the connection information in the DRS task as soon as possible to prevent automatic retry after a task failure. Automatic retry will lock the database accounts.	Different data flow types require different databases and permissions. For details, refer to the following sections: Supported Databases Real-Time Migration Overview Backup Migration Overview Real-Time Synchronization Overview Notes on Data Subscription Real-Time DR Overview
Network	The source database is deployed on a local host.	For details, see From On-premises Databases to Huawei Cloud.
	The source is a database of other cloud.	For details, see From Other Cloud Databases to Huawei Cloud.
	The source is a Huawei Cloud database.	For details, see From Huawei Cloud to Huawei Cloud.
	The source is an ECS-hosted database.	For details, see From ECS-Hosted Databases on Huawei Cloud to Huawei Cloud.