Distributed snapshots: determining global states of distributed systems

  • Authors:
  • K. Mani Chandy;Leslie Lamport

  • Affiliations:
  • Department of Computer Sciences, University of Texas at Austin, Austin, TX;Stanford Research Institute, Menlo Park, CA

  • Venue:
  • ACM Transactions on Computer Systems (TOCS)
  • Year:
  • 1985

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Abstract

This paper presents an algorithm by which a process in a distributed system determines a global state of the system during a computation. Many problems in distributed systems can be cast in terms of the problem of detecting global states. For instance, the global state detection algorithm helps to solve an important class of problems: stable property detection. A stable property is one that persists: once a stable property becomes true it remains true thereafter. Examples of stable properties are “computation has terminated,” “ the system is deadlocked” and “all tokens in a token ring have disappeared.” The stable property detection problem is that of devising algorithms to detect a given stable property. Global state detection can also be used for checkpointing.