A service evaluation method for cross-cloud service choreography

摘要

Traditionally, a service is often located by its functional specification, and then evaluated by its QoSrnproperties. In practice, a service may have multiple functional specifications for satisfying different usersrnwith different expectation descriptions around a similar functional property. For example, a song retrievalrnservice may be enacted by the name of a song or enacted by the lyric of the song if a user does not knowrnthe name of the song. In view of this challenge, a service evaluation method promoted byrnmulti-functional specification is proposed for cross-cloud service choreography, in this paper. Concretelyrnspeaking, a mixed integer programming model is employed to decompose global constraints into localrnconstraints; then, the evaluation is promoted by multi-functional specification and enacted by brokers forrncross-cloud service choreography. At last, experiments are presented to verify our method.