I think the GitHub folks have written more than one article about this. I'm not sure I can find the one I'm thinking of, but here's another one: https://github.

I think the GitHub folks have written more than one article about this. I'm not sure I can find the one I'm thinking of, but here's another one: https://github.blog/2016-04-05-introducing-dgit/ https://github.blog/2016-04-05-introducing-dgit/ > Perhaps it’s surprising that GitHub’s repository-storage tier, DGit, is built using the same technologies. Why not a SAN? A distributed file system? Some other magical cloud technology that abstracts away the problem of storing bits durably? The answer is simple: it’s fast and it’s robust.