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Google still uses ext4 for its servers, while Facebook uses mostly btrfs nowadays.

• nix23 6y ago
  Google has on top of ext4 his GoogleFS, in theory you could even go 'without' a underlying FS, a bit like BlueStore from Ceph.
  • dannypgh 6y ago
    This does not sound right to me. If you're talking about GFS, that's been gone for a decade, and was not a filesystem as far as the kernel was concerned.
    • nix23 6y ago
      That's why i brought up the Ceph example, but counts for databases etc too, actually the early databases had all their own fs/data-structure on the platter.