Migrating to FSx for ONTAP using Amazon DataSync - FSx for ONTAP
Services or capabilities described in Amazon Web Services documentation might vary by Region. To see the differences applicable to the China Regions, see Getting Started with Amazon Web Services in China (PDF).

Migrating to FSx for ONTAP using Amazon DataSync

We recommend using Amazon DataSync to transfer data between FSx for ONTAP file systems and non-ONTAP file systems, including FSx for Lustre, FSx for OpenZFS, FSx for Windows File Server, Amazon EFS, Amazon S3, and on-premises filers. If you're transferring files between FSx for ONTAP and NetApp ONTAP, we recommend using NetApp SnapMirror. Amazon DataSync is a data transfer service that simplifies, automates, and accelerates moving and replicating data between self-managed storage systems and Amazon storage services over the internet or Amazon Direct Connect. DataSync can transfer your file system data and metadata, such as ownership, timestamps, and access permissions.

You can use DataSync to transfer files between two FSx for ONTAP file systems, and also move data to a file system in a different Amazon Web Services Region or Amazon account. You can also use DataSync with FSx for ONTAP file systems for other tasks. For example, you can perform one-time data migrations, periodically ingest data for distributed workloads, and schedule replication for data protection and recovery.

In DataSync, a location is an endpoint for an FSx for ONTAP file system. For information about specific transfer scenarios, see Working with locations in the Amazon DataSync User Guide.


If you plan to use the All tiering policy to migrate your data to the capacity pool tier, keep in mind that file metadata is always stored on the SSD tier, and that all new user data is first written to the SSD tier. When data is written to the SSD tier, the background tiering process will begin tiering your data to capacity pool storage, but the tiering process is not immediate and consumes network resources. You need to size your SSD tier to account for file metadata (3-7% of the size of user data), as a buffer for user data before it is tiered to capacity pool storage. We recommend that you do not exceed 80% SSD utilization.

While migrating data, be sure to monitor your SSD tier using CloudWatch File system metrics to ensure that it is not filling faster than the tiering process can move data to the capacity pool storage. You can also throttle DataSync transfers to a rate that is lower than the rate that tiering is occurring to ensure that your SSD tier does not exceed 80% utilization. For example, for file systems with a throughput capacity of at least 512 MBps, a 200 MBps throttle will typically balance out the data transfer and data tiering rates.


To migrate data into your FSx for ONTAP setup, you need a server and network that meet the DataSync requirements. To learn more, see Requirements for DataSync in the Amazon DataSync User Guide.

Basic steps for migrating files using DataSync

Transferring files from a source to a destination using DataSync involves the following basic steps:

  • Download and deploy an agent in your environment and activate it (not required if transferring between Amazon Web Services).

  • Create a source and destination location.

  • Create a task.

  • Run the task to transfer files from the source to the destination.

For more information, see the following topics in the Amazon DataSync User Guide: