In a gossip system, a front end has vector timestamp (3, 5, 7) representing the data it has received from members of a group of three replica managers. The three replica managers have vector timestamps (5, 2, 8), (4, 5, 6) and (4, 5, 8), respectively. Which replica manager(s) could immediately satisfy a query from the front end and what is the resultant time stamp of the front end? Which could incorporate an update from the front end immediately?
What will be an ideal response?
The only replica manager that can satisfy a query from this front end is the third, with (value) timestamp (4,5,8). The others have not yet processed at least one update seen by the front end. The resultant time stamp of the front end will be (4,5,8).
Similarly, only the third replica manager could incorporate an update from the front-end immediately.
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What will be an ideal response?
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