casync

Content Addressable Data Synchronization Tool

casync provides a way to efficiently transfer files which change over time over the Internet. It will split a given set into a git-inspired content-addressable set of smaller compressed chunks, which can then be conveniently transferred using HTTP. On the receiving side, these chunks will be uncompressed and merged together to recreate the original data. When the original data is modified, only the new chunks have to be transferred during an update.