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Web Services versus Distributed Objects: A Case Study of Performance and Interface Design

机译:Web服务与分布式对象:性能和接口设计的案例研究

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摘要

Web services are promoted as a new model for distributed systems, yet many skeptics see them as simply a poor implementation of traditional remote procedure calls (RPC) or distributed objects. Previous comparisons, which show Web services to be significantly slower than RPC, are biased because they use a RPC communication style and ignore the document-oriented style that is recommended for Web services. We compare the straightforward des ign and implementation of a small file server application implemented using proxy-based RMl and document-oriented Web services. We show that Web services outperform RMI when accessing multiple/deeply nested files, especially over high-latency networks. However, the automatically generated Web service interfaces are awkward to use, so we develop a technique for wrapping the Web service to make it as easy to use as the distributed object implementation. This case study provides a more detailed comparison of the relationship between Web services and distributed objects.
机译:Web服务被推广为分布式系统的新模型,但是许多怀疑论者将其视为对传统远程过程调用(RPC)或分布式对象的不良实现。以前的比较显示Web服务比RPC慢得多,因此有偏差,因为它们使用RPC通信样式,而忽略了为Web服务推荐的面向文档的样式。我们比较了使用基于代理的RM1和面向文档的Web服务实现的小型文件服务器应用程序的直接设计和实现。我们显示,当访问多个/深度嵌套的文件时,尤其是在高延迟网络上,Web服务的性能优于RMI。但是,自动生成的Web服务接口使用起来很尴尬,因此我们开发了一种包装Web服务的技术,以使其像分布式对象实现一样易于使用。此案例研究提供了Web服务与分布式对象之间关系的更详细比较。

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