It's a CoW (copy-on-write) file, it sounds like.
Yes, but it sounds like it's more fine-grained than just the file-level. So even if you change part of one copy, the remaining unchanged subpieces are still shared, iiuc.
alt Hacker News
Yes, but it sounds like it's more fine-grained than just the file-level. So even if you change part of one copy, the remaining unchanged subpieces are still shared, iiuc.