Cassandra+: A System for Doing Query-Driven Simulations

Abstract

A Query-Driven Simulation system Cassandra+ is described that allows end-users to askqueries about outcomes of running simulation models written in various simulation languages.The architecture of Cassandra+, its query language SimQL, and the implementation of thesystem are described. It is argued that Query-Driven Simulations provide a more declarative,flexible, and interactive approach to asking questions about simulation outcomes than the traditionalapproaches of letting the end-users run simulations and gather statistics on the tracefiles being produced.

Keywords: Decision Support, Query-Driven Simulation, Discrete-Event Simulations, Temporal databases, Temporal Query Languages