Check out from nvidia, aistore: https://github.com/NVIDIA/aistore

It's not a fully featured s3 compatible service, like MinIO, but we used it to great success as a local on-prem s3 read/write cache with AWS as the backing S3 store. This avoided expensive network egress charges as we wanted to process data in both AWS as well as in a non-AWS GPU cluster (i.e. a neocloud)