This topic describes what you need to prepare before migration.

Estimate the amount of data to be migrated.

Estimate the size and the number of files to be migrated. Log on to the Object Storage Service console, click the name of the bucket to be migrated, and then check the size and the number of objects (files).
Note To ensure a successful migration, you must enter the appropriate size and number of files when creating a migration job.

Create a destination OSS bucket

Create a destination OSS bucket to store the migrated data. For more information, see Create a bucket.

Create and grant permissions to a RAM user

  1. Log on to the RAM console.
  2. Choose Identities > Users > Create User.
  3. Select Console Password Logon and Programmatic Access, and enter the required user account information.
  4. Save the new account, password, AccessKey ID, and AccessKey secret.
  5. Find the user account, and click Add Permissions to grant the OSS read/write permission (AliyunOSSFullAccess) and Data Transport management permission (AliyunMGWFullAccess) to the RAM user.
    Add permissions
  6. In the left-side navigation pane, select Overview, click the link in the RAM user logon section, and enter the username and password of the new RAM user to log on to the console.
    User logon address