Migrate data from non-Alibaba Cloud sources to Alibaba Cloud NAS - File Storage NAS

Learn about the billing, procedures, and tools for migrating data from non-Alibaba Cloud sources to Alibaba Cloud File Storage NAS.

Billing

Migrating data from non-Alibaba Cloud sources to Alibaba Cloud NAS may incur the following fees:

NAS storage fees: After data is written to NAS, storage fees will be incurred. For more information, see NAS billing overview.
ECS instance fees: If an ECS instance is used as a transit node for data transfer, fees will be charged based on the instance configuration. For more information, see ECS billing overview.
Public network fee (traffic fee): The transit ECS can communicate with the Internet through a fixed public IP or EIP. When billing by traffic usage, inbound traffic for data uploads is free of charge. However, if outbound traffic from ECS to the Internet is generated during migration (such as protocol handshakes, verification response packets, and management access), it will be counted as outbound traffic and incur a small fee. If you use a fixed public IP for ECS, see ECS public bandwidth billing; if you use an EIP, see EIP public network billing.
EIP configuration fee (public IP retention fee): If the transit ECS uses a pay-as-you-go EIP, EIP configuration fees will also be incurred. This fee is waived if the EIP is directly bound to a VPC-type ECS instance and the number of EIPs in the account does not exceed 2,000. For other waiver scenarios and billing details, see EIP configuration fee.

Procedure

To migrate data from a non-Alibaba Cloud source to Alibaba Cloud File Storage NAS, configure an ECS instance as a transit node and mount a NAS file system to the instance. Then, use a migration tool to transfer the data.

If you frequently read and write large amounts of data between a NAS file system and your data center, you can create a leased line connection to directly mount and access the file system. For more information, see Access a file system from a data center.

Migration tool selection

The following table compares the features and scenarios of available migration tools.

Migration tool	Features	Scenarios
Migrate data using an SFTP client	Supports multiple operating system platforms. Provides a graphical user interface (GUI).	Suitable for one-time uploads of a small number of files to an NFS file system or downloading data from an NFS file system to a local device.
Migrate data using rsync	Supports Linux, Windows, and macOS. On a local Linux or macOS system, you can configure a crontab job to automatically back up data to NAS. Preserves file metadata, including owner and permission information, after uploads and downloads. Supports incremental synchronization.	Suitable for uploading and downloading many files or for frequent file transfers.
Migrate data using Robocopy	A built-in tool in Windows. Supports multi-threaded migration and resumable transfers. Handles massive migrations of hundreds of millions of small files, with a total data volume exceeding 10 TB and an average file size of approximately 100 KB. Supports incremental synchronization.	Suitable for multi-threaded, resumable migration of massive amounts of data on Windows operating systems.
Migrate data using IIS FTP	Supports multiple operating system platforms. Provides a GUI.	Suitable for accessing an SMB protocol file system on a NAS file system using an IIS service.
Migrate data using the fpsync command line interface	Migrates data in a multi-threaded manner.	Suitable for multi-threaded data migration to an NFS file system.