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Update stream-analytics-time-handling.md
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articles/stream-analytics/stream-analytics-time-handling.md

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@@ -93,7 +93,7 @@ You may have noticed another concept called early arrival window that looks like
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Because Azure Stream Analytics guarantees complete results, you can only specify **job start time** as the first output time of the job, not the input time. The job start time is required so that the complete window is processed, not just from the middle of the window.
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Stream Analytics derives the start time from the query specification. However, because the input event broker is only indexed by arrival time, the system has to translate the starting event time to arrival time. The system can start processing events from that point in the input event broker. With the early arriving window limit, the translation is straightforward. It’s starting event time minus the 5-minute early arriving window. This calculation also means that the system drops all events that are seen having event time 5 minutes greater than arrival time. (add link to metrics https://docs.microsoft.com/en-us/azure/stream-analytics/stream-analytics-monitoring) Early input events metric is incrimented when the events are dropped.
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Stream Analytics derives the start time from the query specification. However, because the input event broker is only indexed by arrival time, the system has to translate the starting event time to arrival time. The system can start processing events from that point in the input event broker. With the early arriving window limit, the translation is straightforward: starting event time minus the 5-minute early arriving window. This calculation also means that the system drops all events that are seen having event time 5 minutes greater than the arrival time. The [early input events metric](stream-analytics-monitoring.md) is incrimented when the events are dropped.
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This concept is used to ensure the processing is repeatable no matter where you start to output from. Without such a mechanism, it would not be possible to guarantee repeatability, as many other streaming systems claim they do.
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