Meanwhile they cannot get their software to work on ext4 and it is apparently ext4s fault[0].
[0] https://github.com/minio/minio/issues/16602#issuecomment-142...
What's really important here is the person who closed the bug did some summarily, with little to no explanation, other than a reference to O_DIRECT not being supported in ext4, and therefore it "loses data" in production. This is an unprofessional comment to close a bug and I'd expect one of the co-founders of MinIO to do a better job. See https://ext4.wiki.kernel.org/index.php/Clarifying_Direct_IO%... for a discussion of the subletly of O_DIRECT. It's also not really required to make a production filesystem reliable, and would only be a tiny part of an overall reliability solution (because drives themselves often buffer and reorder their writes, sometimes even lying about whether data was "commited durably to disk")