We compare the performance of two transport protocols, SCTP and the New-Reno variant of TCP, for file transfers in two FCS networking scenarios. We argue why SCTP is better suited for file transfers in a network prone to resource failures. To measure performance, we implemented FTP over SCTP in a FreeBSD environment. Our results indicate for our tested path configurations, (1) using SCTP as the...

This M-file analyzes an Institute of Electrical and Electronics Engineers (IEEE) 802.11 Machine Access Control (MAC) layer channel in which multiple nonsaturated stations compete for access to a single access point (AP). The M-file allows the user to model various effects at the physical (PHY) layer, including effects of fading, path loss, and shadowing. The function SNRcdf() performs the PHY l...

Motivated by the prospect of readily available Content Addressable Storage (CAS), we introduce the concept of file recipes. A file’s recipe is a first-class file system object listing content hashes that describe the data blocks composing the file. File recipes provide applications with instructions for reconstructing the original file from available CAS data blocks. We describe one such applic...

There yet exist no truly parallel file systems. Those that make the claim fall short when it comes to providing adequate concurrent write performance at large scale. This limitation causes large usability headaches in HPC computing. Users need two major capabilities missing from current parallel file systems. One, they need low latency interactivity. Two, they need high bandwidth for large para...

INTRODUCTION The aim of this study was to determine the influence of two different glide path preparation methods on the fracture rate of the Primary 25/08 WaveOne reciprocating instrument. Preparation times for different glide path methods and total time for root canal preparation, with and without prior glide path preparation, were also calculated. MATERIALS AND METHODS ISO 15, 0.02 taper E...

Full-path indexing can improve I/O efficiency for workloads that operate on data organized using traditional, hierarchical directories, because data is placed on persistent storage in scan order. Prior results indicate, however, that renames in a local file system with fullpath indexing are prohibitively expensive. This paper shows how to use full-path indexing in a file system to realize fast ...

In this paper, we propose a Distributed File Transfer Protocol (DFTP) which is used to reduce the file download time. DFTP finds suitable mirror servers by the client itself, and calculates the size of transmission subfile for each found mirror server. The size of sub-file is corresponded to the basis of server availability and path quality. Since the file is segmented into sub-files, simultane...