计算机工程
計算機工程
계산궤공정
COMPUTER ENGINEERING
2015年
5期
14-18,25
,共6页
组合服务%动态预测模型%可靠性%绑定图%组合模块
組閤服務%動態預測模型%可靠性%綁定圖%組閤模塊
조합복무%동태예측모형%가고성%방정도%조합모괴
composite service%dynamic prediction model%reliability%binding graph%composite module
为提高动态组合服务的可靠性预测精度,提出一种适用于Web动态服务的可靠性预测模型。将Web服务分解为执行路径、服务组合模块、原子服务等不同粒度的组合单位,构建各组合单位的绑定图,在绑定图的基础上按照粒度大小逐层进行可靠度预测,并将组合单位的可靠度集成为组合服务的可靠度。实例分析结果表明,与现有可靠性预测模型相比,当组合服务中服务组件的可靠度发生变化时,该模型只需计算受该服务影响的执行路径上的可靠度增量,降低了计算复杂度,并且能更高效地进行灵敏度分析以识别组合服务中的关键服务。
為提高動態組閤服務的可靠性預測精度,提齣一種適用于Web動態服務的可靠性預測模型。將Web服務分解為執行路徑、服務組閤模塊、原子服務等不同粒度的組閤單位,構建各組閤單位的綁定圖,在綁定圖的基礎上按照粒度大小逐層進行可靠度預測,併將組閤單位的可靠度集成為組閤服務的可靠度。實例分析結果錶明,與現有可靠性預測模型相比,噹組閤服務中服務組件的可靠度髮生變化時,該模型隻需計算受該服務影響的執行路徑上的可靠度增量,降低瞭計算複雜度,併且能更高效地進行靈敏度分析以識彆組閤服務中的關鍵服務。
위제고동태조합복무적가고성예측정도,제출일충괄용우Web동태복무적가고성예측모형。장Web복무분해위집행로경、복무조합모괴、원자복무등불동립도적조합단위,구건각조합단위적방정도,재방정도적기출상안조립도대소축층진행가고도예측,병장조합단위적가고도집성위조합복무적가고도。실례분석결과표명,여현유가고성예측모형상비,당조합복무중복무조건적가고도발생변화시,해모형지수계산수해복무영향적집행로경상적가고도증량,강저료계산복잡도,병차능경고효지진행령민도분석이식별조합복무중적관건복무。
In order to improve the prediction accuracy of reliability for composite services,this paper proposes a new dynamic prediction model for Web service reliability. A composite service is divided into executing path, service composite module and atomic service according to composite grain. Binding graphs for composite unites are built,and the reliability models for the composition unites are presented based on these binding graphs. The reliability models are integrated for composite services. Example analysis result show that,compared with the traditional reliability prediction model,the proposed model only computes the updated reliability,reduces the computation complexity,and a more flexible sensitivity analysis is performed to determine which service component has the most significant impact on the improvement of composite service reliability.