MinIO Migration?

[nackerr]

Is there an easy way to migrate from MinIO? I have terabytes worth of data, and only 2GB of RAM on my Synology NAS, plus HDDs are very slow and get bottlenecked. All the data exists in the MinIO directory, but if I point rustfs to minio directory I doubt it will work currently. Any ideas?

[soakes]

You have a solid migration option, especially given your hardware constraints (2GB RAM, slow HDDs):

Using MinIO Client (mc)

The MinIO mc client has a built-in mirror command that's designed for exactly this scenario:

mc mirror minio/source-bucket rustfs/destination-bucket

This approach is:

• Memory-efficient – runs as a single process with minimal overhead
• Resumable – can handle interruptions and continue
• Well-tested – officially supported by MinIO for migrations

The mirror command supports incremental synchronization, so if it gets interrupted due to resource constraints, you can simply re-run it and it will pick up where it left off.

Migration Workflow Recommendation

Given your terabytes of data and hardware limitations, I'd suggest:

1. Start with small buckets first to validate the process
2. Run migrations during off-peak hours to avoid I/O bottlenecks
3. Monitor system resources (especially RAM and disk I/O)
4. Use the --watch flag with mc mirror if you need continuous synchronization during the transition

Note on Direct Directory Migration

You're correct that simply pointing RustFS at MinIO's directory won't work. RustFS and MinIO have different internal storage layouts and metadata structures. A proper S3-based migration is the safest path.

Important: You'll need to manually recreate your bucket policies and access keys in RustFS first, as there's no API available for automating this step at the moment.

Hope this helps with your migration!