| "Distributed snapshots: Determining global states of distributed systems." M. Chandy and L. Lamport. ACM Transactions on Computer Systems, February 1985. |
....which indicates that the remote node is either slow or broken. This solution works even if the updates are propagating through multiple databases in the hierarchy because the timestamps are associated with the data and don t change as the data moves. We also use timestamps for consistency control[Chan85]. Timestamps allow quick comparisons of data to determine if it has been updated. We have a timestamp associated with both the data, and the time for when the data was placed in the database. Remote processes maintain a last timestamp (t 0 ) To synchronize with the database, they get a new ....
"Distributed snapshots: Determining global states of distributed systems." M. Chandy and L. Lamport. ACM Transactions on Computer Systems, February 1985.
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