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List<RawBlock> -> List<DownsampledBlock>
Aggregate high-resolution TSDB blocks in object storage into coarser time-intervals using pre-computed min/max/sum/count rollups.
Problem it solves
Querying raw high-resolution metrics over long time horizons is extremely slow and memory-intensive.
Consumes
Emits
The real projects this mechanism was found in. Attribution is the point — this is how the best teams actually do it.