I know that rclone sets the total size of 1 Pb for several cloud providers that do not report total storage size. Also that VFS File Caching provides a helpful --vfs-disk-space-total-size to manually set the statistics about the filing system. However, having this facility available just for VFS File Caches limits the ways it can be used.
Example: When creating a union backend with multiple cloud backends (that do not report total file size), it is not possible to set the total size of individual cloud backends that make up the union.
I want to propose a new property of backends that is explicitly defined inside config file which will define maximum size for that backend.
P.S.: Let me know if there are easier ways of accomplishing the example.