Reliable Data Sharing in Wide Area Gigabit Networked Databases

广域千兆网络数据库中的可靠数据共享

• 批准号: 9812532
• 负责人: Panos Chrysanthis
• 金额: $ 30.31万
• 依托单位: University of Pittsburgh
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-09-15 至 2002-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9812532&HistoricalAwards=false
• 关键词: Reliable; Data; Sharing; Wide; Area

This project's goal is to study the impact of the new capabilities of high-speed networks on the design and performance of data management protocols. In particular, the focus is on high-speed wide-area networks (WANs) where the propagation latency is the dominant communication cost, the migration of large amounts of data is not an issue, and efficient multicasting and guarantees on network Quality of Service (QoS) parameters are available. In this project, existing concurrency control, commit and recovery protocols are being evaluated with respect to performance scalability under the new network assumptions. Further, new protocols are being developed that utilize the huge bandwidth and minimize the number of sequential phases of messages exploiting the multicasting capability and the provision of QoS guarantees such as bounded end-to-end packet delay and packet loss. At the same time, because of the need to scale to thousands of clients and servers, not all of which may be operational at any given time, the new WAN data management protocols are designed to achieve higher site autonomy in a cooperative manner, reducing global synchronization and supporting disconnected operations. The various protocols are empirically evaluated using computer simulation under different scenarios. The results of this research are expected to provide a better insight into the synergy between database and network technologies. This, in turn, will facilitate the deployment of future high performance WAN data server systems which are part of the necessary infrastructure that will support important nation- and world-wide applications such as electronic commerce and other web-based applications. http://www.cs.pitt.edu/admt/projects/wands.html

该项目的目标是研究高速网络的新功能对数据管理协议的设计和性能的影响。特别是，重点是在高速广域网（WAN）的传播延迟是占主导地位的通信成本，大量数据的迁移不是一个问题，有效的组播和网络服务质量（QoS）参数的保证是可用的。在这个项目中，现有的并发控制，提交和恢复协议正在评估性能的可扩展性，在新的网络假设。此外，正在开发新的协议，利用巨大的带宽和最小化的消息的顺序阶段的数量，利用多播能力和提供QoS保证，如有界的端到端的分组延迟和分组丢失。与此同时，由于需要扩展到数千个客户端和服务器，并非所有客户端和服务器都可以在任何给定时间运行，因此新的WAN数据管理协议旨在以协作方式实现更高的站点自治，减少全局同步并支持断开连接的操作。在不同的情况下，使用计算机模拟的各种协议进行经验评估。这项研究的结果，预计将提供一个更好的洞察数据库和网络技术之间的协同作用。这反过来又将促进部署未来的高性能广域网数据服务器系统，这些系统是必要的基础设施的一部分，将支持重要的国家和世界范围的应用，如电子商务和其他基于网络的应用。http://www.cs.pitt.edu/admt/projects/wands.html