casync 2 File synchronization and backup system
casync is a content-addressable data synchronizer that can be used as the basis of a backup system. It is:
A combination of the rsync algorithm and content-addressable storage;
An efficient way to store and retrieve multiple related versions of large file systems or directory trees;
An efficient way to deliver and update OS, VM, IoT and container images over the Internet in an HTTP and CDN friendly way;
An efficient backup system.