1. Apache Cassandra, https://cassandra.apache.org/.
2. Project Voldemort, http://www.project-voldemort.com/voldemort/.
3. Openstack Swift, https://docs.openstack.org/swift/latest/.
4. Ceph: A scalable, high-performance distributed file system;Weil,2006
5. On the role of burst buffers in leadership-class storage systems;Liu,2012