EventCloud allows storing and retrieving RDF data along two modes: synchronous (synchronous SPARQL query), or asynchronous (through subscription requests expressed in a subset of SPARQL) in which case data are notified in the form of events. As RDF, SPARQL is a W3C standard for the semantic web. EventCloud is built as a P2P structured overlay network for full scalability, and is programmed and run using the ProActive middleware.