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> Unless you've worked at a place where you've had access to something like GPFS(or whatever IBM calls it now), where you can put hooks into everything, and programme how you want to mirror/cache/copy namespaces, it all seems impossible.

Do I understand correctly that this would be one possible interpretation of this sentence: If you've only used UNIX, and not something IBM made decades ago, then it seems impossible.

That's hilarious.

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IF you want to take it in isolation, and assume that no-one uses GPFS, then yeah?

The general gist is that unless you've worked in a place that has setup a "proper" network, that is roaming home directories, mapped posix storage, kerberised user account, and some sort of multi-machine graph based job dispatch system (ie airflow, grid engine, large scale k8s with a batch plugin, aws's batch pixar's tractor), then you will have not seen a need for a large clustered filesystem with a posix-like interface.

moreover, given the "filesystems are hard and bad, use object storage instead" noise that we've had since we joined the cloud era, why would you _try_ to use a clustered filesystem? Especially as most of the "free" ones are shite.

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