DISKs: A System for Distributed Spatial Group Keyword Search on Road Networks

Query (e.g., shortest path) on road networks has been exten-sively studied. Although most of the existing query process-ing approaches are designed for centralized environments, there is a growing need to handle queries on road network-s in distributed environments due to the increasing query workload and the challenge of querying large networks. In this demonstration, we showcase a distributed system called DISKs (DI stributed Spatial K eyword search) that is capa-ble of efficiently supporting spatial group keyword search (S-GKS) on road networks. Given a group of keywords X and a distance r, an SGKS returns locations on a road network, such that for each returned location p, there exists a set of nodes (on the road network), which are located within a network distance r from p and collectively contains X. We will demonstrate the innovative modules, performance and interactive user interfaces of DISKs. 1