http://docs.openstack.org/developer/swift/development_saio.html
- Specify ${GROUP} instead of ${USER} as need
- One of the prodtests(about split brain) failed but almost works fine (PUT/GET/DELETE/LIST)
- Modify rsync setting on each storage node
- Make xfs partition for Swift on each storage node
- Build ring corresponds with our env
- Push ring files and configurations into all storage node