The domain of file system usage spans a wide range of geographic environments, usage scenarios, and security requirements. Existing file systems generally have been designed for a particular set of scenarios; however, no one system works well across all environments simultaneously. LegionFS is a file system infrastructure that allows multiple policies and implementations to co-exist in order to...

This paper describes an efficient and elegant architecture for unifying the meta-data protection of journaling file systems with the data integrity protection of collision-resistant cryptographic hashes. Traditional file system journaling protects the ordering of meta-data operations to maintain consistency in the presence of crashes. However, journaling does not protect important system meta-d...

The Cooperative File System (CFS) is a new peer-to-peer read-only storage system that provides provable guarantees for the efficiency, robustness, and load-balance of file storage and retrieval. CFS does this with a completely decentralized architecture that can scale to large systems. CFS servers provide a distributed hash table (DHash) for block storage. CFS clients interpret DHash blocks as ...

Increasingly le systems for multiprocessors are de signed with parallel access to multiple disks to keep I O from becoming a serious bottleneck for parallel ap plications Although le system software can trans parently provide high performance access to parallel disks a new le system interface is needed to facili tate parallel access to a le from a parallel application We describe the di culties...

Data availability is an important issue in mobile computing environments. Both distributed data management systems and mobile storage devices, such as USB-flash drives, are used to allow users ubiquitous access to their data, but both solutions have their shortcomings. In this paper, we present the FEW Phone File System, a system designed to allow users to access their personal data independent...

We have designed, prototyped, and evaluated the Legend file system, which exploits the ability to regenerate lost files to improve reliability. Unlike RAID-5 and RAID-6, Legend degrades gracefully as the number of failed storage devices increases. Legend also mitigates the high storage capacity overhead imposed by n-way replications. Combined with existing methods, Legend can form another line ...

Is it possible to implement a distributed file system, retaining some of the advanced protocol features of systems like Coda, while getting an implementation that is an order of magnitude simpler? We claim the answer is “yes”, and InterMezzo is well on its way towards being a prototype of such a system. The key design decisions were to exploit local file systems as server storage and as a clien...

Implementing and maintaining file systems is painful. OS functionality is notoriously difficult to develop and debug, and file systems are more so than most because of their size and interactions with other OS components. In-kernel file systems must adhere to a large number of internal OS interfaces. Though difficult during initial file system development, these dependencies particularly compli...

The HERMES file system is state-of-the-art file system designed to handle multimedia streaming workload in consumer electronics platform. The design objective of HERMES is to minimize the delay and the delay variance of I/O request in the sequential workload. File organization, meta data structure, unit of storage, or etc. are elaborately tailored to achieve this objective. Further, HERMES prov...