Re:Chronon, Airbnb's ML Feature Platform, Is Now Open Source
by ezvz on Tuesday April 09, 2024 @05:14PM
(#39984329)
6NF works well for some temporal data, but I haven't seen it work well for windowed aggregations because the start/end time format of saving values doesn't handle events "falling out of the window" too well. At least the examples I've seen have values change due to explicit mutation events.
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Re:Chronon, Airbnb's ML Feature Platform, Is Now Open Source
by hobs on Tuesday April 09, 2024 @07:32PM
(#39985426)
Agree, you don't really want to pre-aggregate your temporal data, or it will effectively only aggregate at each row-time boundary and the value is lower than just keeping the individual calculations.