Introduction In recent years, a great deal of work has been done on distributed and parallel file systems. Although the motivations behind these two types of file systems are quite different, they share many underlying characteristics and techniques. Distributed file systems need to provide clients with efficient, usable, and scalable high-bandwidth access to stored data. Parallel file systems ...

This paper compares three distributed file system architectures: the vnode architecture found in SunOS, the architecture used in the Sprite distributed file system, and the architecture used in the Plan 9 distributed file system. The emphasis of the comparison is on generalized support for remote access to file system resources, which include peripheral devices and IPC communication channels as...

The need to have a mobile user’s computing persona or environment move along with him or her must be satisfied if mobile computing is to become attractive to the general user. One way to do this without depending on a universal network infrastructure is to have the user carry his or her persona on a persona carrier, a device that stays with its owner at all times. Based on this idea, we have pr...

The Direct Access File System (DAFS) is a distributed file system built on top of direct-access transports (DAT). Direct-access transports are characterized by using remote direct memory access (RDMA) for data transfer and user-level networking. The motivation behind the DAT-enabled distributed file system architecture is the reduction of the overhead on the I/O data path. The goal of this work...

This paper presents the Modify-on-Access (MonA) le system, an active le system, that cooperates with processes to accomplish tasks. The MonA le system optimizes critical read and write paths, while simplifying system software and application programs. MonA provides a framework for dynamically pushing and popping modular transformations onto data streams during accesses. We demonstrate that the ...

Mobile agents are a powerful tool for coordinating general purpose distributed computing, where the main goal is high performance. In this paper we demonstrate how the inherent mobility of agents may be exploited to achieve fast file access, which is necessary for most general-purpose applications. We present a file system for mobile agents based exclusively on local disks of the participating ...

Fast access to files of integers is crucial for the efficient resolution of queries to databases. Integers are the basis of indexes used to resolve queries, for example, in large internet search systems and numeric data forms a large part of most databases. Disk access costs can be reduced by compression, if the cost of retrieving a compressed representation from disk and the CPU cost of decodi...

Data replica placement is an important issue in the cloud storage system, which includes two key points: how to determine the replica factor and how to select optimal Datanode to store replica. With the provision of file store service and file access service for large scale users, the Datanode in cloud storage system is regarded as services site. According to the basic principle of queuing theo...