Snapshot algorithm

A snapshot algorithm is used to create a consistent snapshot of the global state of a distributed system.[1] Due to the lack of globally shared memory and a global clock, this is not trivially possible.

Example

Several computers work together in a distributed system. Each of them represents a bank account holding a certain amount of money. The participants can transfer money between their accounts by exchanging the messages.

To calculate the overall balance, just requesting the balance of each participant can lead to an incorrect result, as different accounts might be recorded before or after any transfers in progress. But a snapshot algorithm would avoid this as it makes sure to record the whole state in a point in time.

Algorithms

References

  1. ^ Vijay K. Garg (23 May 2002). Elements of Distributed Computing. John Wiley & Sons. p. 121. ISBN 978-0-471-03600-5.


Stub icon

This computer science article is a stub. You can help Wikipedia by adding missing information.

Content Disclaimer

Informasi ini disarikan dari Wikipedia dan disajikan kembali untuk tujuan edukasi. Konten tersedia di bawah lisensi CC BY-SA 3.0. Kami tidak bertanggung jawab atas ketidakakuratan data yang bersumber dari kontribusi publik tersebut.

  1. The information displayed on this website is sourced in part or in whole from Wikipedia and has been adapted for the purpose of restating it. We strive to provide accurate and relevant information, however:
  2. There is no guarantee of absolute accuracy. Wikipedia is an open, collaborative project that can be edited by anyone, so information is subject to change.
  3. It is not intended to constitute professional advice. The content displayed is for informational and educational purposes only. For important decisions (e.g., medical, legal, or financial), please consult a professional.
  4. Content copyright. Wikipedia is licensed under the Creative Commons Attribution-ShareAlike License (CC BY-SA). This means that content may be reused with appropriate attribution and shared under a similar license.
  5. Responsible use. Any risk arising from the use of information from this website is entirely the responsibility of the user.