Recent releases of the UNIX operating system provide support for network file systems. Network file systems extend the hierarchical file system name space by allowing remote file systems to appear as sub-trees within the local file system. In this article we show how the basis of a user mode file server which supports such a network file system may also be used as a server for a variety of oth...

Traditional local file systems support a persistent name space. A local file system views devices as being locally attached, the devices are not shared, and hence there is no need in the file system design to enforce devicesharing semantics. Instead, the focus is on aggressively caching and aggregating file system operations to improve performance by economizing on the number of actual disk acc...

We show that a class of spin models, containing the Ashkin–Teller model, admits a generalized random–cluster (GRC) representation. Moreover we show that basic properties of the usual representation, such as FKG inequalities and comparison inequalities, still hold for this generalized random–cluster model. Some elementary consequences are given. We also consider the duality transformations in th...

I have recently developed dmfs, a Data Migration File System, for NetBSD[1]. This file system is based on the overlay file system, which is discussed in a separate paper[2], and provides kernel support for the data migration system being developed by my research group here at NASA/Ames. The file system utilizes an underlying file store to provide the file backing, and coordinates user and syste...

introduction: the aim of this in vitro study was to evaluate the effect(s) of three canal lubricants i.e. sodium hypochlorite, rc-prep as the paste form of ethylenediaminetetraacetic acid (edta) and aqueous edta, on the occurrence/incidence of fracture, deformity and metal slivering of protaper rotary instruments. methods: a total of 120 mesial canals ( i.e. mesiobuccal and mesiolingual) of fir...

Existing file-system reliability methods, such as checksums, redundancy, or transactional updates, provide limited defenses against file-system bugs that cause disk corruption. The existing workarounds, based on using backups or repairing the file system, are painfully slow. Worse, the recovery is performed much after the error occurred, and thus may result in further corruption and data loss. ...

In the self-stabilizing algorithmic paradigm for distributed computing each node has only a local view of the system, yet in a nite amount of time the system converges to a global state, satisfying some desired property. A function f : V (G) ! f0; 1; 2; : : : ; kg is a fkgdominating function if j2N[i]f(j) k for all i 2 V (G). In this paper we present self-stabilizing algorithms for nding a mini...

We study the asymptotic behavior of the simple random walk on oriented versions of Z. The considered lattices are not directed on the vertical axis but unidirectional on the horizontal one, with symmetric random orientations which are positively correlated. We prove that the simple random walk is transient and also prove a functional limit theorem in the space D([0,∞[, R) of càdlàg functions, w...

We present a transactional file system for flash memory devices. The file system is designed for embedded microcontrollers that use an on-chip or on-board NOR flash device as a persistent file store. The file system provides atomicity to arbitrary sequences of file system operations, including reads, writes, file creation and deletion, and so on. The file system supports multiple concurrent tra...

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...