HydraNet-FT:提供可靠服务的网络支持

Gurudatt Shenoy, Suresh Satapati, R. Bettati
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引用次数: 40

摘要

随着互联网越来越多地被用作各种关键服务的访问媒介,越来越需要在互联网上以完全客户端透明的方式提供容错(FT)服务。我们提出HydraNet-FT,这是一种跨互联网动态复制服务的基础设施,并使副本为客户端提供单个容错服务接入点。HydraNet-FT使用TCP通信协议,在服务器端进行了一些修改,以允许从客户端到服务副本的一对多消息传递和从副本到客户端的多对一消息传递。副本之间的通信通道提供原子性和消息排序。低延迟故障估计器用于检测系统中服务器的故障并启动故障转移机制。在本地测试平台上的实现和测量表明,我们的方案的开销相当小。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
HydraNet-FT: network support for dependable services
With the Internet increasingly being used as the access medium for a variety of critical services, there is a growing need to provide fault-tolerant (FT) services over internetworks, in a completely client-transparent fashion. We present HydraNet-FT, an infrastructure to dynamically replicate services across an internetwork and have the replicas provide a single fault-tolerant service access point to clients. HydraNet-FT uses the TCP communication protocol with a few modifications on the server side to allow one-to-many message delivery from a client to service replicas and many-to-one message delivery from the replicas to the client. A communication channel between the replicas provides atomicity and message ordering. A low-latency failure estimator is used to detect failures of servers in the system and to initiate fail-over mechanisms. An implementation and measurements on a local testbed show that the overhead of our scheme is reasonably small.
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