what is incremental data aggregation?

Question Posted / maheshp

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what is incremental data aggregation?..

Incremental aggregation means applying only the captured
changes in the source to aggregate calculations in a session.
When the source changes only incrementally and if we can
capture those changes,then we can configure the session to
process only those changes.This allows informatica server to
update target table incrementally,rather than forcing it to
process the entire source and recalculate the same
calculations each time you run the session.By doing this
obviously the session performance increases.

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what is incremental data aggregation?..

Answer / shruthi

When the aggregator transformtaion executes all the output
data will get stored in the temporary location called
aggregator cache. when the next time the mapping runs the
aggreagator transformation runs for the new records loaded
after the first run. These output values will gets
incremented with the values in the aggregator cache. Thia
is called incremental aggregation. By this way we can
improve performance...

Correct me if i was wrong

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what is incremental data aggregation?..

Answer / lokesh y g

suppose yesterday 100 got inserted into target,today 50
records inserted and 25 records got updateted ,rather then
pulling all records, using incremental logic we can pull
the data only updated records and inserted records using
setmax variable ........

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