Integrating coherency and recoverability in distributed systems


Conference Paper

We propose a technique for maintaining coherency of a transactional distributed shared memory, used by applications accessing a shared persistent store. Our goal is to improve support for fine-grained distributed data sharing in collaborative design applications, such as CAD systems and software development environments. In contrast, traditional research in distributed shared memory has focused on supporting parallel programs; in this paper, we show how distributed programs can benefit from this shared-memory abstraction as well. Our approach, called log-based coherency, integrates coherency support with a standard mechanism for ensuring recoverability of persistent data. In our system, transaction logs are the basis of both recoverability and coherency. We have prototyped log-based coherency as a set of extensions to RVM [Satyanarayanan et al. 94], a runtime package supporting recoverable virtual memory. Our prototype adds coherency support to RVM in a simple way that does not require changes to existing RVM applications. We report on our prototype and its performance, and discuss its relationship to other DSM systems.

Duke Authors

Cited Authors

  • Feeley, MJ; Chase, JS; Narasayya, VR; Levy, HM

Published Date

  • November 14, 1994

Published In

  • Proceedings of the 1st Usenix Conference on Operating Systems Design and Implementation, Osdi 1994

Citation Source

  • Scopus