[GitHub] [incubator-pinot] fx19880617 edited a comment on issue #6368: Smart query layer with rolled up data

[GitBox <gi...@apache.org>]

fx19880617 edited a comment on issue #6368:
URL: https://github.com/apache/incubator-pinot/issues/6368#issuecomment-748389769


   Just to think about this problem.
   
   I feel we need to pre-define the granularity of segment metadata, then in the broker routing strategy, we can implement the hierarchy of segments with different time granularity. And of course, the time boundary should be aligned always.
   
   Then for each query,  we can parse the time range from the query then pick the right segments to cover the entire time range.
   
   
   Apart from generating roll-up segments, have you tried Star-tree for this metrics aggregation use case? Though this is single-segment level aggregation. 
   https://docs.pinot.apache.org/basics/indexing/star-tree-index
   


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