Migrating Archived Data

Scenarios

This section describes how to quickly migrate archived data from source buckets to Huawei Cloud OBS buckets. Using OMS directly to migrate archived data takes a long time.

• If you do not restore archived objects in advance, and if you rely entirely on the automatic restoration function of OMS, it takes 1 to 5 minutes to restore an archived object, depending on the source object storage services. This can significantly slow down the migration.
• For OBS buckets with the direct reading function enabled, even though the archived data in these OBS buckets can be directly downloaded without being restored in advance, OMS cannot migrate such data because its storage class is not changed.
• You will be billed for enabling direct reading for your source bucket and enabling OMS to automatically restore archived data in the source bucket. To learn about OBS billing details, see Pricing Details.
• Before you migrate archived data, you are advised to set the storage class of the destination bucket to Standard. After the migration is complete, confirm that the migrated data is correct, and change the storage class of the destination bucket to Archive.

Prerequisites

• You have signed up for a HUAWEI ID and enabled Huawei Cloud services, and completed real-name authentication.
• You have obtained the AK/SK pairs and required permissions for the source and destination platform accounts.
  • The source platform account needs the permissions for:
    • Listing buckets
    • Obtaining bucket locations
    • Listing objects
    • Obtaining object metadata
    • Obtaining object content

    For details about how to obtain these permissions, see Source Permissions.

  • The destination platform account needs the permissions for:
    • Listing buckets
    • Obtaining bucket locations
    • Listing objects
    • Obtaining object metadata
    • Obtaining object content
    • Listing uploaded parts
    • Restoring archived objects

    For details about how to obtain these permissions, see Destination Permissions.

• You have created a bucket in OBS.

Procedure

1. Use a tool or the source platform management console to restore the archived data before migration. It is recommended that you configure a long restoration duration.
   • If the source bucket is not on Huawei Cloud, follow the restoration methods provided by the source cloud service vendors.
   • If the source bucket is on Huawei Cloud, use obsutil to restore the archived data. For details, see Restoring Objects from OBS Archive.

2. Sign in to the Huawei Cloud console.
3. Click Service List and choose Migration > Object Storage Migration Service.
4. If there is more than 3 TB data or more than 5 million objects to migrate, create a migration task group.

   If there is not a lot of data to migrate, create a migration task. For higher migration efficiency, you are advised to use storage migration workflows on MgC. MgC allows you to migrate data using dedicated, scalable migration clusters and up to 20 Gbit/s of bandwidth.

   

   It is recommended that you enable the Archive Data Restoration function of OMS. OMS will automatically restore and migrate the archived data.