A novel technique for improving the performance of read operations in BlobSeer Distributed File System

摘要

Distributed System is a group of autonomous computers that are networked together and appears to its users as single coherent system. Distributed File System (DFS) is a core component of a distributed system (DS) and it is used for storing and sharing data among authorized users of the DS. File sharing semantics are used by the file systems for sharing the data in a consistent manner. Most of the DFSs use Session Semantics for file sharing purpose. The main disadvantage of Session Semantics is that concurrent client processes may not be able to read recent and consistent data. In this paper, we propose a speculation-based novel scheme for the BlobSeer DFS which permits the updated contents of a file can be revealed to other concurrent clients immediately without waiting for the closure of the session by the client which updates the file. So, clients can read the most recently modified and consistent data from the BlobSeer DFS.