A low latency metadata server is good, but you still have the latency to the S3 server, e.g. Amazon S3 (from your README.md).

Now you could say, that I could host my own S3 e.g. MinIO in the same DC, but then I could also simply deploy Ceph, which is battle tested for years up to the petabyte range and with iSCSI, S3 and FS interfaces.

So I think this project might give the wrong impression that you can simply combine a Redis with Amazon S3 and then have a good FS solution available, which is unfortunately not the case.