ITR/CISE: LOCKSS

高度可靠的信息基础设施需要大量复制、缓慢故障和抗攻击的系统。LOCKSS系统使用新颖的技术来提高可靠性，在这一领域显示出更广泛的适用性和越来越重要的前景，包括：从参与“民意调查”的大量副本中构建容错系统，而不是从参与选举的少量副本中构建容错系统。限制系统运行的速度，以限制系统可能出现故障的速度。建立一个系统，在不要求保密的情况下抵制“坏人”的活动，部分通过使用公共通信和声誉系统。这个和其他点对点系统的经验表明，使系统工作的真正挑战只有在实际的操作规模和在实际网络上运行时才会变得明显。LOCKSS系统现在在互联网上与全球60个对等点一起运行。该项目将利用LOCKSS测试平台来调查需要进一步工作的领域。

A highly dependable information infrastructure requires systems that are massively replicated, slow to fail, and resistant to attack. The LOCKSS system uses novel techniques for increasing dependability that show promise of wider applicability and increasing importance in this area, including:Building a fault-tolerant system from a large number of replicas that take part in "opinion polls" rather than a small number of replicas that take part in elections.Limiting the speed at which the system operates in order to limit the speed at which it can fail.Building a system that resists the activities of the "bad guy" without requiring that secrets be kept, in part by using public communication and a reputation system.Experience with this and other peer-to-peer systems shows that the real challenges of making systems work only become apparent at a realistic operational scale and running on real networks. The LOCKSS system is now running on the Internet with 60 peers worldwide. The project will exploit this LOCKSS test-bed to investigate areas in which further work is needed.