[论文泛读] Reliability of Web Service三篇

[泛读1] A reliability evaluation framework on composite web service (SOSE, 2008)

Time: 0.7 hour
Jiang Ma, Hao-peng Chen, "A Reliability Evaluation Framework on Composite Web Service," sose, pp.123-128, 2008 IEEE International Symposium on Service-Oriented System Engineering, 2008

1. 本文讨论了一种组合服务的reliability建模方法, 分为3个层次
(1) atomic web service
具有一个failure intensity parameter和fix time(服从指数分布), 假设failure之间相互独立.
使用了常用的time-dependent Markov model来推导service reliability的公式(用到了Kolomogorov's equation).
(2) node
相当于service class, 其中一个为primary web service, 其他为backup web service. 使用Markov chain计算reliability.
(3) composite web service
借用Cardoso的Stochastic Workflow Reduction方法计算组合服务的reliability.

2. 整篇论文比较简单, SOSE也只是一个很普通的会议.

[泛读2] A reliability evaluation framework on service oriented architecture (ICPCA, 2007)

Time: 0.4 hour
Liu, Z., Gu, N., Yang, G. (2007), "A reliability evaluation framework on service oriented architecture", Proceeding of ICPCA 2007, 2nd International Conference on Pervasive Computing and Applications, pp.466-71.

    本文主要提出了一个"framework of evaluation under reliability"(原文如是), 看了abstract, introduction和conclusion后, 还是不清楚本文思路, 另外, 文章英语语言也不太好, 不打算读全文了.

[泛读3] A software reliability model for web services (IASTED, 2004)

Time: 1 hour
Tsai, W. T. and D. Zhang, et al. (2004). A software reliability model for web services. Proceedings of the Eighth IASTED International Conference on Software Engineering and Applications, November 9, 2004 - November 11, 2004, Cambridge, MA, United states, Acta Press. (gs:29)

1. 本文提出了一种针对atomic/composite web service reliability的模型(SORM: Service-Oriented software Reliability Model),
对于atomic web service, 使用group testing and majority voting方法来预测其reliability(S2). 这种方法要求每个service都有alternative services, 一个request会发给所有这些功能等价服务, 并根据群体执行的结果来确定个体是否可靠.
对于composite web service, 使用architectural-based模型来估计, 即根据不同的组合模式(文中提到了sequence, choice, loop, concurrency), 提出相应的计算公式(S3). 有一点跟其他论文不同, 本文的模型考虑了条件语句(对于condition, loop结构)的reliability.