[jmull]

I'm kind of chuckling at this thread because you're working so hard to not understand.

I think the previous poster could/should have said, "It is not a hierarchical file system and has no concept of directories." where I added the word "hierarchical".

But it's also pretty obvious that was the point.

[anonymous-panda]

I disagree with that characterization because the contrast by OP was that S3 is “just a KV store implying” it doesn’t meet the criteria for being considered a filesystem.

For example, you could implement POSIX directory semantics on top of S3. About the only POSIX filesystem API you couldn’t implement it append / overwrite (well you could but it might be prohibitively expensive).