mirror of
https://github.com/trapexit/mergerfs.git
synced 2025-06-10 13:28:31 +08:00
34 lines
1.7 KiB
Markdown
34 lines
1.7 KiB
Markdown
# Terminology
|
|
|
|
* `disk`, `drive`, `disk drive`: A [physical data storage
|
|
device](https://en.wikipedia.org/wiki/Disk_storage). Such as a hard
|
|
drive or solid-state drive. Usually requires the use of a filesystem
|
|
to be useful. mergerfs does not deal with disks.
|
|
* `filesystem`: Lowlevel software which provides a way to organize data
|
|
and provide access to said data in a standard way. A filesystem is a
|
|
higher level abstraction that may or may not be stored on a
|
|
disk. mergerfs deals exclusively with filesystems.
|
|
* `path`: A location within a filesystem. mergerfs can work with any
|
|
path within a filesystem and not simply the root.
|
|
* `branch`: A base path used in a mergerfs pool. mergerfs can
|
|
accommodate multiple paths pointing to the same filesystem.
|
|
* `pool`: The mergerfs mount. The union of the branches. The instance
|
|
of mergerfs. You can mount multiple mergerfs pools. Even with the
|
|
same branches.
|
|
* `relative path`: The path in the pool relative to the branch and
|
|
mount. `foo/bar` is the relative path of mergerfs mount
|
|
`/mnt/mergerfs/foo/bar`.
|
|
* `function`: A filesystem call such as `open`, `unlink`, `create`,
|
|
`getattr`, `rmdir`, etc. The requests your software make to the
|
|
filesystem.
|
|
* `category`: A collection of functions based on basic behavior
|
|
(action, create, search).
|
|
* `policy`: The algorithm used to select a file or files when
|
|
performing a function.
|
|
* `path preservation`: Aspect of some policies which includes checking
|
|
the path for which a file would be created.
|
|
* `out-of-band`:
|
|
[out-of-band](https://en.wikipedia.org/wiki/Out-of-band) in our
|
|
context refers to interacting with the underlying filesystem
|
|
directly instead of going through mergerfs (or NFS or Samba).
|