Hoping to get answers to this on Debian based distros:
When saving a file, from any program, I'd wish to know if it is possible for the OS to automatically save based on file size. For example, imagine a system with a "big" HDD and a "small" SSD (the OS being installed on another SSD) so, If a create, copy or move command is issued on a file larger than say, 100 MB, save that file to the HDD, otherwise to the SSD.
I know there are caching solutions that place frequently used files to the cache storage, but that's not what I want. I want all files smaller than some amount to be stored in the "small" SSD without user intervention, no matter from what program the file is created, as long as that file is created by the user.
Can this be done in Bcache (or any other solution)?
P.S. This requirement is only for user data files (documents, photos, movies, downloaded files). I'm not interested in OS, program or system generated files... let those decide their own location in the system mount drive. Also, I would like the solution not to "make a copy" on the cache, I do not want to have duplicates. A separate backing solution would do this.
