摘 要:從市場經濟模式下的網格服務模型出發,研究滿足基于市場需求的網格計算為目的,先后討論了服務契約的三個內容,首先給出粒度的概念,其次描述服務粒度化的必要性,然后闡述了服務契約的產生,最后按照企業建議的內容提出一種格式化契約的形式。該服務契約適用于作為市場模式下網格計算的服務供需雙方的電子交易憑證。關鍵詞:網格計算;服務粒度; 服務契約; 電子交易憑證
中圖分類號:TN915-34文獻標識碼:A
文章編號:1004-373X(2010)18-0087-04
Application of Service Contract in Grid Computation
ZHU Hui1,2
(1.Department of Computer Science and Technology, Xi’an University of Post Telecommunications, Xi’an 710121, China;
2.School of Computer Science Technology, Xidian University, Xi’an 710071, China)
Abstract: With the development of grid computation technology, the distributed resource scheduling and user certification become an important subject of network service. Service contract as a solution of resource certification and distribution, which is accepted by more and more network service systems. Proceeding from the grid service model under the market economy, aiming at the grid computation based on the market requirement, three contents of service contract are discussed in this paper. At first, the concept of granulation and service granularity are offered. Secondly, it describes what is service contrast. Finally, the form of a contract format is suggested in accordance with the recommendations of the enterprise. The concept of service contract can be applied to be the E-commerce proof between the service providers and service consumers in the grid computation of the market economy.Keywords: grid computer; service granularity; service contract; electronic trade evidence
0 引 言
網格計算(grid computing,GC)[1]作為分布式計算的一個分支,與傳統的分布式計算技術相比,網格計算的特點主要體現在三個方面,即協調非集中控制資源,網格整合各種資源,協調各種使用者;使用標準,開放,通用的協議和界面解決認證、授權、資源發現和資源存取等基本問題;網格允許它的資源被協調使用,以得到多種服務質量,滿足不同使用者需求,如系統響應時間,流通量,有效性,安全性,及資源重定位,使得聯合系統的功效比其各部分的功效總和要大得多。正由于它有如上特點,網格計算已經廣泛地被企業和政府用于IT優化、分析加速、信息訪問、工程設計、設計協作和信息存取等領域。成功的網格應用主要有:美國的Globus[2],Legion[3],Condor,IPG等;歐洲的CERN DataGrid[4],UNICORE,MOL等;澳大利亞的Nimrod/G[5],EcoGrid等;日本的Ninf[6],Bricks等。最新的歐洲電子對撞機的數據處理系統就是按照網格計算模式建立的三層數據處理交換機構。
網格計算本質上利用互聯網技術,形成一個巨大的的資源和作業池。……