This topic describes the precautions and procedure for data migration.

Precautions

When creating a migration job, you must note the following issues:
  • A migration job occupies the network resources of the source data address and destination data address. To ensure business continuity, we recommend that you specify a speed limit for a migration job or perform the migration job during off-peak hours.
  • Before a migration job is performed, files at the source data address and the destination data address are checked. The files at the destination data address are overwritten if the source files have the same name as the destination files and have a later modification time. If two files have the same name but different content, you must change the name of one file or back up the files.

Step 1: Create a source data address

  1. Log on to the Data Transport console.
  2. Choose Data Online Migration > Data Address, and click Create Data Address.
  3. In the Create Data Address dialog box, configure the parameters and click OK.
    Parameter Required Description
    Data Type Yes Select Http/Https.
    Data Name Yes A data name is 3 to 63 characters in length. Special characters are not supported, except for hyphens (-) and underscores (_).
    File Path Yes Enter oss://{bucket}/{the name of a list file}.

    For more information, see Create a list file.

    List Access Endpoint Yes Enter an appropriate endpoint. For more information, see Regions and endpoints.
    List Access AK and List Access SK Yes Enter the credentials that are used to migrate data.
  4. You must apply for whitelist permissions because this feature is in the public preview phase. Click Application.
  5. Enter the required information and submit the application for using this feature. After the application is approved, you will receive a short message service (SMS) notification.

Step 2: Create a destination data address

  1. Choose Data Online Migration > Data Address, and click Create Data Address.
  2. In the Create Data Address dialog box, configure the parameters and click OK.
    Parameter Required Description
    Data Type Yes Select OSS.
    Data Region Yes Select a region where the destination data address is located.
    Data Name Yes A data name is 3 to 63 characters in length. Special characters are not supported, except for hyphens (-) and underscores (_).
    OSS Endpoint Yes
    AccessKeyId and AccessKeySecret Yes Enter an AccessKey pair that is used to migrate data. For more information, see Create an AccessKey pair.
    OSS Bucket Yes Select a bucket to store migrated data.
    OSS Prefix No An OSS prefix cannot start with a forward slash (/) and must end with a forward slash (/). For example, data/to/oss/. Do not specify the parameter if you want to migrate data to the root directory of a bucket.

Step 3: Create a migration job

  1. Choose Data Online Migration > Migration Jobs, and click Create Job.
  2. In the Create Job dialog box, read the Terms of Migration Service, select I understand the above terms and conditions, and apply for opening data migration service, and then click Next.
    Then, the Fee Reminder dialog box appears.OSS_billing request
  3. In the Create Job dialog box, configure the parameters and click Next.
    Parameter Required Description
    Job Name Yes A job name is 3 to 63 characters in length and can contain lowercase letters, digits, and hyphens (-). A job name cannot start or end with a hyphen (-).
    Source Data Address Yes Select the source data address that you have created.
    Destination Data Address Yes Select the destination data address that you have created.
    Migration Type Yes Full: specifies a full migration. After all data is migrated, a migration job is closed. You can submit the job again if the data at the source data address changes. In this case, Data Transport only migrates the data that is changed after the previous job.
    Notice Before you start a migration job, Data Transport compares files of the source data address with those of the destination data address. If a source file has the same name as a destination file, the destination file is overwritten when one of the following conditions is met:
    • The content types of the source file and the destination file are different.
    • The source file is updated after the previous migration.
    • The size of the source file is different from that of the destination file.
  4. On the Performance tab, navigate to the Data Prediction section and specify the Data Size and File Count parameters.
    Note To ensure a successful migration, you must estimate the amount of data to be migrated. For more information, see Estimate the amount of data to be migrated.
  5. Optional. On the Performance tab, navigate to the Flow Control section, specify the Time Range and Max Flow parameters, and then click Add.
    Note To ensure business continuity, we recommend that you specify the Time Range and Max Flow parameters based on the fluctuation of workloads.
  6. Click Create and wait until the migration job is completed.