d1234c44_uild_Cloud_Storage__Swift_Book__Summary
[Video Title] Sheepdog: Yet Another All-In-One Storage for Openstack [Link] https://www.openstack.org/summit/openstack-summit-hong-kong-2013/session-videos/presentation/sheepdog-yet-another-all-in-one-storage-for-openstack [Summary] 
Sheepdog is purely userspace distributed storage system for QEMU. It is essentially an object storage system that manages disks and aggregates the space and performance of disks linearly in hyper scale on commodity hardware in a smart way.
Build Cloud Storage: Swift Book
Summary