A reliability model for distributed adaptation
A reliability model for distributed adaptation
复制标题
分布式自适应的可靠性模型
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
G. Popek
中科院分区：
文献类型：
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作者：
M. Yarvis;P. Reiher;G. Popek
端到端连接越来越多样化，整个网络的特征存在数量级差异。与此同时，大多数应用程序假定网络特性的水平低于该水平，它们要么不提供服务，要么以高于用户愿意支付的成本提供服务。开放式架构的网络通过将自适应技术引入网络，可以在网络条件较差时帮助应用程序优雅地降级。不幸的是，由于自适应试图在传输过程中改变数据流，因此它与传统的可靠数据流模型不兼容。需要一种新的可靠性模型来允许可靠数据流的普遍适应。我们提出了一个可能的模型，提供可靠的交付的语义在数据流中，尽管适应。我们提出了这个模型的背景下导体，分布式适应的框架。通过使用与自适应兼容的可靠性模型，Conductor允许任意分布式组件对数据流进行操作，而不会降低端到端的可靠性。虽然Conductor是一种可能的适配服务，但它也是开放架构网络中所需的可靠性模型类型的一个示例。
End-to-end connectivity is growing increasingly diverse, with orders-of-magnitude differences in characteristics throughout the network. At the same time, most applications assume a level of network characteristics below which they either provide no service, or service at a cost that is higher than the user is willing to pay. Open-architecture networks can help applications degrade gracefully when network conditions are poor by pushing adaptation technology into the network. Unfortunately, since adaptation seeks to change the data stream during transmission, it is incompatible with the traditional model for reliable data streams. A new model of reliability is required to allow general the adaptation of reliable data streams. We propose one possible model that provides reliable delivery of the semantic meaning in the data stream, despite adaptation. We present this model in the context of Conductor, a framework for distributed adaptation. By using a reliability model that is compatible with adaptation, Conductor allows arbitrary distributed components to operate on a data stream without reducing end-to-end reliability. While Conductor is one possible adaptation service, it is also an example of the type of reliability model required in open-architecture networks.