docs: improve "rclone about" docs and relate to union mfs limitation in ftp remote

See: https://forum.rclone.org/t/rclone-union-mfs-most-free-space-not-working-for-ftp/20346
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edwardxml 2020-11-23 16:34:27 +00:00 committed by GitHub
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2 changed files with 14 additions and 8 deletions

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@ -236,6 +236,11 @@ through rclone are time of upload.
Rclone's FTP backend does not support any checksums but can compare Rclone's FTP backend does not support any checksums but can compare
file sizes. file sizes.
`rclone about` is not supported by the FTP backend. Backends without
this capability cannot determine free space for an rclone mount or
use policy `mfs` (most free space) as a member of an rclone union
remote. [More](https://rclone.org/overview/#optional-features)
The implementation of : `--dump headers`, The implementation of : `--dump headers`,
`--dump bodies`, `--dump auth` for debugging isn't the same as `--dump bodies`, `--dump auth` for debugging isn't the same as
for rclone HTTP based backends - it has less fine grained control. for rclone HTTP based backends - it has less fine grained control.

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@ -318,9 +318,8 @@ remote itself may assign the MIME type.
## Optional Features ## ## Optional Features ##
All the remotes support a basic set of features, but there are some All rclone remotes support a base command set. Other features depend
optional features supported by some remotes used to make some upon backend specific capabilities.
operations more efficient.
| Name | Purge | Copy | Move | DirMove | CleanUp | ListR | StreamUpload | LinkSharing | About | EmptyDir | | Name | Purge | Copy | Move | DirMove | CleanUp | ListR | StreamUpload | LinkSharing | About | EmptyDir |
| ---------------------------- |:-----:|:----:|:----:|:-------:|:-------:|:-----:|:------------:|:------------:|:-----:| :------: | | ---------------------------- |:-----:|:----:|:----:|:-------:|:-------:|:-----:|:------------:|:------------:|:-----:| :------: |
@ -424,13 +423,15 @@ on the particular cloud provider.
### About ### ### About ###
This is used to fetch quota information from the remote, like bytes Rclone `about` prints quota information for a remote. Typical output
used/free/quota and bytes used in the trash. includes bytes used, free, quota and in trash.
This is also used to return the space used, available for `rclone mount`. If a remote lacks about capability `rclone about remote:`returns
an error.
If the server can't do `About` then `rclone about` will return an Backends without about capability cannot determine free space for an
error. rclone mount, or use policy `mfs` (most free space) as a member of an
rclone union remote.
### EmptyDir ### ### EmptyDir ###