mirror of https://github.com/apache/druid.git
e79284da59
* new interval based cost function Addresses issues with balancing of segments in the existing cost function - `gapPenalty` led to clusters of segments ~30 days apart - `recencyPenalty` caused imbalance among recent segments - size-based cost could be skewed by compression New cost function is purely based on segment intervals: - assumes each time-slice of a partition is a constant cost - cost is additive, i.e. cost(A, B union C) = cost(A, B) + cost(A, C) - cost decays exponentially based on distance between time-slices * comments and formatting * add more comments to explain the calculation |
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