GraphSSD replaces the conventional logical to physical page mapping mechanism in an SSD with a novel vertex-to-page mapping scheme and exploits the detailed knowledge of the ﬂash properties to minimize page accesses. GraphSSD also supports efﬁcient graph updates (vertex and edge modifications) by minimizing unnecessary page movement overheads.
The novelty of this work is that the SSD controller is made aware of the graph data structures stored on the SSD. Thus the controller can automatically translate the graph access APIs into a set of low level physical page accesses to fetch the requested data. These APIs accept basic graph related queries such as fetching adjacent vertices for a target vertex, fetching edge weights of connected edges. GraphSSD APIs are generic enough to enable developers to write complex graph analytics on top of GraphSSD.