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Illustrations of the Refresh Operation
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TimelinesThe following two illustrations ( Figure 1-2 and Figure 1-3) show the state of a target and the source at different times: after an update at the target, during a refresh, and after a refresh. The queries applied at the target are shown on the target's timeline. The circles on the timelines represent events, such as when a transaction is committed or when a refresh is issued. The boxes represent the content of tables at the given time. An asterisk (*) after an entry in a table means this value is from a provisional transaction. Values without asterisks are durable. A Simple ScenarioFigure 1-2 shows a very simple scenario:
Figure 1-2 A simple synchronization scenario A Slightly More Complicated Synchronization ScenarioFigure 1-3 shows a slightly more complicated synchronization scenario than the one in Figure 1-2:
Figure 1-3 A slightly more complicated synchronization scenario |
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