These are the userspace tools required for bcache.
Bcache is a patch for the Linux kernel to use SSDs to cache other block devices. For more information, see http://bcache.evilpiepirate.org. Documentation for the run time interface is included in the kernel tree, in Documentation/bcache.txt.
This is a companion discussion topic for the original entry at https://copr.fedorainfracloud.org/coprs/vorona/bcache/