Advertisement

Experience with Disconnected Operation in a Mobile Computing Environment

  • M. Satyanarayanan
  • James J. Kistler
  • Lily B. Mummert
  • Maria R. Ebling
  • Puneet Kumar
  • Qi Lu
Part of the The Kluwer International Series in Engineering and Computer Science book series (SECS, volume 353)

Abstract

In this paper we present qualitative and quantitative data on file access in a mobile computing environment. This information is based on actual usage experience with the Coda File System over a period of about two years. Our experience confirms the viability and effectiveness of disconnected operation. It also exposes certain deficiencies of the current implementation of Coda, and identifies new functionality that would enhance its usefulness for mobile computing. The paper concludes with a description of what we are doing to address these issues.

Keywords

File System Mobile Computing Distribute File System File Access Cache Manager 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. [1]
    Cova, L.L., “Resource Management in Federated Computing Environments”, Ph.D. Thesis, Department of Computer Science, Princeton University, October 1990.Google Scholar
  2. [2]
    Davidson, S., “Optimism and Consistency in Partitioned Distributed Database Systems”, ACM Transactions on Database Systems, Vol. 3,No. 9, September 1984.Google Scholar
  3. [3]
    Herlihy, M., “Optimistic Concurrency Control for Abstract Data Types”, Proceedings of the Fifth Annual Symposium on Principles of Distributed Computing, August 1986.Google Scholar
  4. [4]
    Howard, J.H., Kazar, M.L., Menees, S.G., Nichols, D.A., Satyanarayanan, M., Sidebotham, R.N., West, M.J., “Scale and Performance in a Distributed File System”, ACM Transactions on Computer Systems, Vol. 6,No. 1, February 1988.Google Scholar
  5. [5]
    Huston, L., Honeyman, P., “Disconnected Operation for AFS”, Proceedings of the 1993 USENIX Symposium on Mobile and Location-Independent Computing, Cambridge, MA, August 1993.Google Scholar
  6. [6]
    Kazar, M.L., “Synchronization and Caching Issues in the Andrew File System”, Winter Usenix Conference Proceedings, Dallas, TX, 1988.Google Scholar
  7. [7]
    Kistler, J.J., Satyanarayanan, M., “Disconnected Operation in the Coda File System”, ACM Transactions on Computer Systems, Vol. 10,No. 1, February 1992.Google Scholar
  8. [8]
    Kistler, J.J., “Disconnected Operation in a Distributed File System”, Ph.D. Thesis, Department of Computer Science, Carnegie Mellon University, May 1993.Google Scholar
  9. [9]
    Kumar, P., Satyanarayanan, M., “Log-Based Directory Resolution in the Coda File System”, Proceedings of the Second International Conference on Parallel and Distributed Information Systems, San Diego, CA, January 1993.Google Scholar
  10. [10]
    Kumar, P., Satyanarayanan, M., “Supporting Application-Specific Resolution in an Optimistically Replicated File System”, submitted to the 4th IEEE Workshop on Workstation Operating Systems, Napa, CA, October 1993.Google Scholar
  11. [11]
    Mummert, L.B., Satyanarayanan, M., “File Cache Consistency in a Weakly Connected Environment”, submitted to the 4th IEEE Workshop on Workstation Operating Systems, Napa, CA, October 1993.Google Scholar
  12. [12]
    Mummert, L.B., “Efficient Long-Term File Reference Tracing”, In preparation, 1993.Google Scholar
  13. [13]
    Sandberg, R., Goldberg, D., Kleiman, S., Walsh, D., Lyon, B., “Design and Implementation of the Sun Network Filesystem”, Summer Usenix Conference Proceedings, 1985.Google Scholar
  14. [14]
    Satyanarayanan, M., Kistler, J.J., Kumar, P., Okasaki, M.E., Siegel, E.H., Steere, D.C., “Coda: A Highly Available File System for a Distributed Workstation Environment”, IEEE Transactions on Computers, Vol. 39,No. 4, April 1990.Google Scholar
  15. [15]
    Satyanarayanan, M., “Scalable, Secure, and Highly Available Distributed File Access”, IEEE Computer, Vol. 23,No. 5, May 1990.Google Scholar
  16. [16]
    Satyanarayanan, M., Mashburn, H.H., Kumar, P., Steere, D.C., Kistler, J.J., “Lightweight Recoverable Virtual Memory”, School of Computer Science, Carnegie Mellon University, CMU-CS-93-143, March 1993.Google Scholar
  17. [17]
    Steere, D.C., Kistler, J.J., Satyanarayanan, M., “Efficient User-Level Cache File Management on the Sun Vnode Interface”, Summer Usenix Conference Proceedings, Anaheim, June 1990.Google Scholar

Copyright information

© USENIX Association 1993

Authors and Affiliations

  • M. Satyanarayanan
    • 1
  • James J. Kistler
    • 1
  • Lily B. Mummert
    • 1
  • Maria R. Ebling
    • 1
  • Puneet Kumar
    • 1
  • Qi Lu
    • 1
  1. 1.School of Computer ScienceCarnegie Mellon UniversityUSA

Personalised recommendations