Concise Version Vectors in WinFS

  • Dahlia Malkhi
  • Doug Terry
Part of the Lecture Notes in Computer Science book series (LNCS, volume 3724)


Conflicts naturally arise in optimistically replicated systems. The common way to detect update conflicts is via version vectors, whose storage and communication overhead are number of replicas × number of objects. These costs may be prohibitive for large systems.

This paper presents predecessor vectors with exceptions (PVEs), a novel optimistic replication technique developed for Microsoft’s WinFS system. The paper contains a systematic study of PVE’s performance gains over traditional schemes. The results demonstrate a dramatic reduction of storage and communication overhead in normal scenarios, during which communication disruptions are infrequent. Moreover, they identify a cross-over threshold in communication failure-rate, beyond which PVEs loses efficiency compared with traditional schemes.


Communication Overhead Version Vector Storage Overhead Communication Disruption Object Version 
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  1. 1.
    Parker Jr., D.S., Popek, G.J., Rudisin, G., Stoughton, A., Walker, B.J., Walton, E., Chow, J.M., Kiser, S., Edwards, D., Kline, C.: Detection of mutual inconsistency in distributed systems. IEEE Transactions on Software Engineering 9(3), 240–247 (1983)CrossRefGoogle Scholar
  2. 2.
    Page Jr., T.W., Guy, R.G., Heidemann, J.S., Ratner, D.H., Reiher, P.L., Goel, A., Kuenning, G.H., Popek, G.: Perspectives on optimistically replicated peer-to-peer filing. Software – Practice and Experience 11(1) (December 1997)Google Scholar
  3. 3.
    Ladin, R., Liskov, B., Shrira, L., Ghemawat, S.: Providing high availability using lazy replication. ACM Transactions on Computer Systems 10(4), 360–391 (1992)CrossRefGoogle Scholar
  4. 4.
    Ratner, D.H.: Roam: A Scalable Replication System for Mobile and Distributed Computing. PhD thesis, UCLA Technical report UCLA-CSD-970044 (1998)Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2005

Authors and Affiliations

  • Dahlia Malkhi
    • 1
    • 2
  • Doug Terry
    • 2
  1. 1.The Hebrew University of JerusalemIsrael
  2. 2.Microsoft Research Silicon Valley 

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