Help Center/ Migration Center/ FAQs/ Storage Migration/ What Are the Differences Between OMS and MgC in Storage Migration?
Updated on 2025-08-19 GMT+08:00

What Are the Differences Between OMS and MgC in Storage Migration?

Item

OMS

MgC Migration Workflows

Scenario

Small- and medium-scale object storage migration

Complex large-scale and high-concurrency migration

Positioning

OMS is an online data migration service. It is used to migrate data from object storage services of other cloud service providers to Object Storage Service (OBS) of Huawei Cloud.

MgC is a one-stop migration platform. MgC migration workflows support not only object storage migration, but also file storage migration. It also provides standard workflow templates tailored to different migration scenarios.

Migration performance

Generally, OMS can migrate 10 TB to 20 TB of data per day. It allows you to create migration task groups for large-capacity and large-scale object migration to maximize concurrency performance. A maximum of five concurrent migration tasks are allowed for you in a single region.

MgC allows you to migrate data using dedicated, scalable migration clusters and up to 20 Gbit/s of bandwidth. You can specify the number of concurrent subtasks in a storage migration workflow in MgC based on the number of online migration nodes. There cannot be more than 10 concurrent subtasks for each online migration node.

Migration speed

Shared resources, bandwidth, and quotas limit the migration speed to 500 Mbit/s.

Migration speed is influenced by both the available migration bandwidth and the IOPS performance of the source and target storage systems. The maximum migration speed is calculated by multiplying the migration speed of a single node by the total number of nodes.

Migration objects

  • Only object storage migration is supported.
  • Only object data is migrated.
  • By default, only the latest version of objects is migrated.
  • Metadata migration is restricted.
  • Object ACLs cannot be migrated.
  • Object storage and file storage (NAS and SMB) can be migrated.
  • Full and incremental data migration are supported.
  • Object ACLs and metadata can be migrated.

Migration network

  • Internet
  • Intranet
  • Internet
  • Intranet
  • Private lines

Migration scenarios

  • Object storage migration
  • Migration with URL lists
  • Migration with object lists
  • Object and file storage migration
  • Migration with URL lists
  • Migration with object lists

Billing

Free

You need to pay for the migration cluster resources used. For example, you use a migration cluster that consists of one master node, N list nodes, and N migration nodes.