SOSP '91 Proceedings of the thirteenth ACM symposium on Operating systems principles
Practical File System Design with the Be File System
Practical File System Design with the Be File System
A characterization of the sensitivity of query optimization to storage access cost parameters
Proceedings of the 2003 ACM SIGMOD international conference on Management of data
MediaBroker: An Architecture for Pervasive Computing
PERCOM '04 Proceedings of the Second IEEE International Conference on Pervasive Computing and Communications (PerCom'04)
Toward a standard ubiquitous computing framework
MPAC '04 Proceedings of the 2nd workshop on Middleware for pervasive and ad-hoc computing
Analysis and evolution of journaling file systems
ATEC '05 Proceedings of the annual conference on USENIX Annual Technical Conference
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With advances in ubiquitous environments, user demand for easy data-lookup is growing rapidly. Not only users but intelligent ubiquitous applications also require data-lookup services for a ubiquitous computing framework. This paper proposes a backward-compatible, searchable virtual file system (S-VFS) for easy data-lookup. We add search functionality to the VFS, the de facto standard abstraction layer over the file system. Users can find a file by its attributes without remembering the full path. S-VFS maintains the attributes and the indexing structures in a normal file per partition. It processes queries and returns the results in a form of a virtual directory. S-VFS is the modified VFS, but uses legacy file systems without any modification. Since S-VFS supports full backward compatibility, users can even browse hierarchically with the legacy path name. We implement S-VFS in Linux kernel 2.6.7-21. Experiments with randomly generated queries demonstrate outstanding lookup performance with a small overhead for indexing.