---
title: "Database Migration Service prerequisites"
slug: "dms-spec"
tags: ["Database Migration Service", "DMS"]
updated: 2026-09-17T09:25:07Z
published: 2026-09-17T09:25:07Z
canonical: "guide.ncloud-docs.com/dms-spec"
stale: true
---

> ## Documentation Index
> Fetch the complete documentation index at: https://guide.ncloud-docs.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Database Migration Service prerequisites

Available in VPC

View supported specifications, supported databases and pricing information, etc., for smooth use of Database Migration Service.

## Cloud environment specifications

The following details are about the cloud environments supported by Database Migration Service:

| Item | Specifications |
| --- | --- |
| Region (zone) | Korea |
| Platform | VPC |
| Languages | Korean, Japanese, English |

              Note

              

For more information on the VPC environment, see [service introduction](https://www.ncloud.com/product/networking/vpc) on NAVER Cloud Platform portal, and for more information on whether the VPC environments are supported for each service, see [Ncloud user environment guide](/docs/en/environment-environment-1-1).

## Supported databases

Database Migration Service supports MySQL and MariaDB database migration.

- It is recommended to migrate between databases with the same major version.
- For Cloud DB for MySQL, up to 6 TB can be used for Block Storage.
- For normal use, the total data capacity, including backup files created during migration, must not exceed 6 TB.

The following describes Whether migration is supported depending on the detailed settings of source DB:

- Database, TABLE's character set: euckr, utf8 and utf8mb4 supported
- mysqldump backup method: table, view, stored procedure, function and trigger migration supported
- mydumper backup method: table, stored procedure, function and trigger migration supported
- TABLE ENGINE: MyISAM, BLACKHOLE, FEDERATED, ARCHIVE and MEMORY are not supported.
- User account information, MySQL config items and event migration are not supported

              Note

              

No action is to be taken for the following problems encountered during Database Migration Service operations:

- System failures stemming from the customer input errors (such as requests for access to non-existent files), violations of precautionary measures specified by the company in the terms of service or user guides, or service utilization exceeding usage limits (for example: overloading database instances beyond operational capacity, or creating excessive tables that substantially increase migration time).
- Prolonged migration periods due to source DB size limitations.
- Database system conflicts, operational disruptions, or completely non-functional database instances that originate from external database engine software components that constitutes this service.

## Pricing information

Database Migration Service is a free service that does not incur additional charges. However, the following costs may be incurred depending your service usage:

- Fees based on the storage usage of target DB Server.
- Fees based on the network usage if source DB is a database within NAVER Cloud Platform.

For details about the Database Migration Service's pricing standard, refer to the **Portal > Services > Database > Database Migration Service**.

- [**Portal > Services > Database > Database Migration Service**](https://www.ncloud.com/product/database/dbMigrationService)