Git

Concepts

Git is a Distributed Version Control Systems (DVCS). Clients don’t just check out the latest snapshot of the files: they fully mirror the repository. Thus if any server dies, and these systems were collaborating via it, any of the client repositories can be copied back up to the server to restore it. Every clone is really a full backup of all the data.

For Git a version history is a stream of snapshots of the complete project. Therefore the local repository contains the complete history of a project.