ITR: Fast, Flexible, and Secure Wide-Area File Systems

ITR：快速、灵活且安全的广域文件系统

• 批准号: 0218019
• 负责人: Peter Keleher
• 金额: --
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-09-01 至 2007-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0218019&HistoricalAwards=false
• 关键词: ITR; Fast; Flexible; Secure; Wide

This proposal describes a set of new techniques for managing access to remote files in the wide area. The vehicle for evaluating these techniques will be a wide-area file system called MoteFS. MoteFS will provide fast, flexible, and secure access to remote files over untrusted wide-area networks. In more detail, the following mechanisms and policies will be investigated:- fine-grained namespace mechanisms that allow namespaces to be efficiently and securely added, mutated, transferred and deleted at granularities from single files to millions of files.- decomposable credentials, which allow credential holders to locally derive and transfer weaker credentials without contacting file owners.- a cross-server versioning abstraction, which allows correlated versions of a group of files to be referenced even if they span multiple users and file systems.- client-side differencing, which allows redundant data to be eliminated during network writebacks.- wide-area prefetching and caching algorithms.The combined effect of these techniques will allow allow users to interact with their files in a flexible, secure, location-independent manner.

该提案描述了一组用于管理广域远程文件访问的新技术。评估这些技术的工具将是一个名为 MoteFS 的广域文件系统。 MoteFS 将通过不受信任的广域网提供对远程文件的快速、灵活和安全的访问。 更详细地说，将研究以下机制和策略： - 细粒度命名空间机制，允许命名空间以从单个文件到数百万个文件的粒度高效、安全地添加、变异、传输和删除。 - 可分解凭证，允许凭证持有者在本地派生和传输较弱的凭证，而无需联系文件所有者。 - 跨服务器版本控制抽象，允许关联 即使跨越多个用户和文件系统，也要引用一组文件的版本。 - 客户端差异，允许在网络写回期间消除冗余数据。 - 广域预取和缓存算法。这些技术的综合效果将允许用户以灵活、安全、独立于位置的方式与其文件进行交互。