An Implementation of the WS-Agreement Negotiation Standard in CloudSim

The currently dominating market mechanism for selling IaaS resources is the so called supermarket approach: Consumer buy resources from providers without negotiation. The recent development of Amazon EC2 spot market shows that dynamic market mechanisms are becoming increasingly popular. The so called Bazaar approach is such a dynamic market mechanism. On a Bazaar-base market consumer and provider can negotiate all characteristics of IaaS resources described by SLAs. The WS-Agreement Negotiation standard describes concepts for such bilateral negotiations on Bazaar-based markets. The scientific simulation framework CloudSim is not able to simulate Bazaar-based markets. Thus we extended the framework by developing the so called Bazaar-Extension which implements the basic principles of the WS-Agreement Negotiation standard. Using the Bazaar-Extension consumers and datacenters are created, strategies are assigned to them and the result of the bilateral negotiation simulation are analysed.