clintropolis commented on issue #7201: Coordinator documentation is stale URL: https://github.com/apache/incubator-druid/issues/7201#issuecomment-470287410 Yes, you are right, loading and dropping decisions are done with the `BalancerStrategy` so that the load rules and the balancer do not make contradictory decisions. I believe `DiskNormalizedCostBalancerStrategy` would achieve what the current document is describing, but I think `CostBalancerStrategy` or `CachingCostBalancerStrategy` don't care so much about disk i think and just prefer to spread out the timeline for maximum fanout. You are also correct about http segment loading, where the coordinator maintains a list of segments to load and drop (`HttpLoadQueuePeon`), and talks to the historical directly over http (`SegmentListerResource` on historical side) to give it a batch of load or drop operations to do.
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