mcvsubbu commented on issue #3460: Who knows what these two fields mean? In the table segmentConfig ' URL: https://github.com/apache/incubator-pinot/issues/3460#issuecomment-437976273 To add to what @jackjlli mentioned, think of REFRESH use case as one in which all data is refreshed by re-loading the entire data (i.e. all segments are replaced). In contrast. APPEND use cases add a segment (or a few) each day (or hour) with new data while old data is retained out. HOURLY, DAILY, etc. are values of segment PushFrequency. It is used in the ValidationManager to detect gaps in existing segments and raise alerts. It is also used to name the segments correctly while generating Pinot segments. Hope this helps.
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