Migrating Data Between File Systems

Solution Overview

You can migrate data from an SFS Capacity-Oriented file system to an SFS Turbo file system or the other way around.

In this solution, a Linux ECS is used to connect the SFS Capacity-Oriented file system and the SFS Turbo file system.

Notes and Constraints

• Only Linux ECSs can be used to migrate data.
• The Linux ECS, SFS Capacity-Oriented file system, and SFS Turbo file system must be in the same VPC.
• Incremental migration is supported, so you can only migrate the changed data.

Prerequisites

• You have created a Linux ECS.
• You have created an SFS Capacity-Oriented file system and an SFS Turbo file system and have obtained their addresses.

Procedure

1. Log in to the ECS console.
2. Log in to the Linux ECS.
3. Mount either the SFS Capacity-Oriented or SFS Turbo file system to the ECS.

   mount -t nfs -o vers=3,timeo=600,noresvport,nolock,tcp Address of the file system /mnt/src

4. Mount the other file system to the ECS.

   mount -t nfs -o vers=3,timeo=600,noresvport,nolock,tcp Address of the other file system /mnt/dst

5. Download and install rclone. For the download address, see https://rclone.org/downloads/.
6. Synchronize data.

   rclone copy /mnt/src /mnt/dst -P --transfers 32 --checkers 64 --links --create-empty-src-dirs

   

   The parameters are described as follows. Set transfers and checkers based on the system specifications.

   • /mnt/src: source path
   • /mnt/dst: destination path
   • --transfers: number of files that can be transferred concurrently
   • --checkers: number of local files that can be scanned concurrently
   • -P: data copy progress
   • --links: replicates the soft links from the source. They are saved as soft links in the destination.
   • --copy-links: replicates the content of files to which the soft links point. They are saved as files rather than soft links in the destination.
   • --create-empty-src-dirs: replicates the empty directories from the source to the destination.

   After data synchronization is complete, go to the target file system to check whether data is migrated.

Verification

1. Log in to the Linux ECS.
2. Check the file synchronization results on the destination server.

   cd /mnt/dst
   ls | wc -l

3. If the data volume is the same as that on the source server, data is migrated successfully.