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

该提案描述了一套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：-细粒度的命名空间机制，允许以从单个文件到数百万个文件的粒度有效且安全地添加、改变、传输和删除命名空间。可分解的凭证，允许凭证持有者在本地获得和传输较弱的凭证，而无需联系文件所有者。跨服务器版本控制抽象，允许引用一组文件的相关版本，即使它们跨越多个用户和文件系统。客户端差异，允许在网络回写期间消除冗余数据。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、位置无关的方式与他们的文件进行交互。

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.