Designing a True Direct-Access File System with DevFS
نویسندگان
چکیده
We present DevFS, a direct-access file system embedded completely within a storage device. DevFS provides direct, concurrent access without compromising file system integrity, crash consistency, and security. A novel reverse-caching mechanism enables the usage of host memory for inactive objects, thus reducing memory load upon the device. Evaluation of an emulated DevFS prototype shows more than 2x higher I/O throughput with direct access and up to a 5x reduction in device RAM utilization.
منابع مشابه
The Linux Device File-System
The Device File-System (devfs) provides a powerful new device management mechanism for Linux. Unlike other existing and proposed device management schemes, it is powerful, flexible, scalable and efficient. It is an alternative to conventional disc-based character and block special devices. Kernel device drivers can register devices by name rather than device numbers, and these device entries wi...
متن کاملAccuracy of an Intraoral Digital System for File Length Measurement
Introdouction: Canal length measurement is essential for proper endodontic treatment. Any error or miscalculation in working length determination, particularly in curved canals, can result in complications during or after root canal therapy. Digital radiography has enabled accurate measurement of curved canal length. In this study, we evaluated the accuracy of calibration of a complementary m...
متن کاملpNFS and Linux: Working Towards a Heterogeneous Future
Heterogeneous and scalable remote data access is a critical enabling feature of widely distributed collaborations. Parallel file systems feature impressive throughput, but sacrifice heterogeneous access, seamless integration, security, and cross-site performance. Remote data access tools such as NFS and GridFTP provide secure access to parallel file systems, but either lack scalability (NFS) or...
متن کاملIn Vitro Comparative Study of the Working Length Determination with Radiovisiography and Conventional Radiography in Dilacerated Canals
Introduction: The aim of this study was to compare digital and conventional radiography in determining the working length of dilacerated canals.Methods: Thirty nine human extracted single-rooted teeth with root curvature more than 35 degrees were included in this study. After access preparation, a file was inserted into the canal and advanced until the file tip was visualized at the foramen. Wi...
متن کاملPropeller: A Scalable Metadata Organization for A Versatile Searchable File System
The exponentially increasing amount of data in file systems has made it increasingly important for file systems to provide fast file-search services. The quality of the file-search services is significantly affected by the file-index overhead, the file-search responsiveness and the accuracy of search results. Unfortunately, the existing file-search solutions either are so poorly scalable that t...
متن کامل