[chrislusf]

The blob storage is what SeaweedFS built on. All blob access has O(1) network and disk operation.

Files and S3 are higher layers above the blob storage. They require metadata to manage to the blobs, and other metadata for directories, S3 access, etc.

These metadata usually sit together with the disks containing the files. But in highly scalable systems, the metadata has dedicated stores, e.g., Google's Colossus, Facebook's Techtonics, etc. SeaweedFS file system layer is built as a web application of managing the metadata of blobs.

Actually SeaweedFS file system implementation is just one way to manage the metadata. There are other possible variations, depending on requirements.

There are a couple of slides on the SeaweedFS github README page. You may get more details there.

[ImPostingOnHN]

Thank you, that was very informative. I appreciate your succinct, information dense writing style, and appreciate it in the documentation, too, after reviewing that.