4 ms·

What aspects of NFS do you think break half of the important guarantees of a file system?

• jcalvinowens 2y ago
  Well, at least O_APPEND, O_EXCL, O_SYNC, and flock() aren't guaranteed to work (although they can with recent versions as I understand it). UID mapping causing read() to return -EACCES after open() succeeds breaks a lot of userland code.
  • DiggyJohnson 2y ago
    Just ran into this one recently trying to replace Docker w/ Podman for a CICD runner. Before anyone protests we have very strong, abnormal requirements on my project preventing most saner architectures. It wasn’t the root cause but the failure behavior was weird due to the behavior you just described.
  • rwmj 2y ago
    Lack of inotify support is one that has annoyed me in the past. It not only breaks some desktop software, but it also should be possible for NFS to support (after all, the server sees the changes and could notify clients).
  • huntaub 2y ago
    Thanks for this, it's helpful. Totally heard about O_APPEND and read() returning -EACCESS. The other ones, I agree, should be fixed in later versions of the Linux kernel/NFS client.