Awesome
cafs
Content-Addressable File System.
This is the data caching back-end used by the BitWrk distributed computing software. See https://bitwrk.net/ for more info.
Stores data in de-duplicated form and provides a remote-synching mechanism with another CAFS instance.
Data no longer referenced is kept in cache until the space is needed. Currently, data is not saved to persistent storage.