[Ansible](http://www.ansible.com/home) seems to be a pretty efficient automation tool to deploy and to update applications on servers.

* Is it possible to use it to backup a (Linux) server as well? Is it a good practice to do so?
* If yes, is there any module/example on how to do it? For example, let's say I want to create an export of a database and copy it on another machine, how to automate this task with Ansible?