Module locality 

Where a dataset physically lives, and what that implies about opening it.

The home screen’s job is to let someone decide what to open. Size and row count answer “what is this”; they say nothing about “what will happen when I press Enter”. A 2 GB file on tmpfs and a 2 GB file on a hotel-wifi NFS mount are the same row and a thousandfold different experience.

Everything here is derived from /proc/self/mountinfo, which is a local read of a kernel-generated file: it cannot block on the filesystem it describes, which is the whole reason it is safe to consult about a share that has stopped answering.

Structs

Mounts

The mount table, parsed once.

Source

Where something lives and what the kernel calls it.

Enums

Locality

How a dataset is reached, in the terms that predict what opening it costs.

Constants

NETWORK_FILESYSTEMS

Filesystems whose reads cross a network.

Functions

object_scheme

The URL scheme of an object-store path, if it is one.