The following describes how to configure fully managed and semi-managed migration tasks to migrate data from Alibaba Cloud OSS to Tencent Cloud COS.
Create an RAM account and grant required permissions:
AccessKeyID
, and AccessKeySecret
.QcloudCOSAccessForMSPRole
and QcloudCOSFullAccess
policies.SecretId
, and SecretKey
.Note:You can use Migration Service Platform (MSP) with your root account. However, for security reasons, we recommend you create a sub-account, use the sub-account's API key for migration, and delete the sub-user after migration.
On the Object Storage Migration page, click Create a Task to enter the object storage migration task configuration page and set migration parameters.
Set the migration task name.
Task Name: It can contain 1–60 letters, digits, underscores, and hyphens. You will need to use this name when viewing the migration status and progress in the task list.
Estimate the task size.
We recommend you enter an optional accurate task size for us to better prepare resources.
Set the source of files to be migrated.
Here, select Alibaba Cloud OSS for Service Provider and enter the AccessKeyID
and AccessKeySecret
of the Alibaba Cloud sub-account created above in AccessKey and SecretKey boxes respectively. Then, click the Refresh icon on the right of the Migration bucket name drop-down list to get the list of source buckets.
You can also manually enter a source bucket name.
Select the header migration mode.
If the file in the source bucket has headers and tags set and they need to be retained after migration, select to keep them or set the replacement rule.
Set the migration rule.
Choose to migrate all the files of the specified bucket, or only migrate files with a specified prefix.
Set a time range.
Enable Time Range to migrate only files added or changed within the specified time range.
Select a file storage type.
Set the storage type of the migrated files based on your migration needs. You can select Standard Storage, Infrequent Access Storage, Keep the original storage properties, or Archive Storage.
Set the execution speed.
All public cloud object storage services have speed limits. To ensure business stability, check with the source vendor and set the maximum available migration bandwidth in Mbps before migrating.
Select the migration target.
In Migration Target Information, enter the SecretId
and SecretKey
of the Tencent Cloud sub-user for migration. Then, click the Refresh icon on the right of the Migration bucket name drop-down list to get the list of target buckets.
Specify the directory in the target bucket for migration and the method to process files with the same name.
/a.txt
and /dir/b.txt
are to be migrated, and "dest" is entered in the text box. In this case, after migration, the paths of these two files in the target bucket will be /dest/a.txt
and /dest/dir/b.txt
.dest/20180901
is entered in the text box, then after migration, the paths of these two files in the target bucket will be /dest/20180901/a.txt
and /dest/20180901/dir/b.txt
.Note:
- If you select Overwrite for files with the same name, the source files will directly overwrite the files with the same name in the target bucket.
- If you select Skip for files with the same name, the system will process them based on the last modification time of the files (
LastModified
):- If the
LastModified
of the file in the source address is at or after that of the file in the target address, overwriting will be performed.- If the
LastModified
of the file in the source address is before that of the file in the target address, no overwriting will be performed.- Perform secondary migration if the object (file) content is changed during migration.
Select a migration mode.
Click Create and Start to start the migration task.
You can view the status and progress of all file migration tasks on the file migration tool homepage:
• For the Task completed status, green indicates that the migration task was completed and all files were successfully migrated, while yellow indicates that the migration task was completed but some files failed to be migrated.
• After you click Retry failed task, files that failed in the task will be retried for migration, while files that have been successfully migrated will not be transferred again.
• You can click Export to export the list of files that failed to be migrated.
The migration speed is subject to the lowest speed during each stage of the migration process and is affected by factors such as the network transfer speed and maximum concurrency as detailed below:
Affecting Factor | Description |
---|---|
Read speed of the migration source | The read speed of the data source varies by vendor. |
Transfer speed of MSP | MSP offers up to 2,000 Mbps migration bandwidth in fully managed mode. In semi-managed mode, the bandwidth is subject to your migration resource size. |
Write speed of the migration target | COS: The default write speed is 15,000 Mbps, and the write QPS is 3,000–30,000. |
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