mirror of https://github.com/apache/druid.git
8091c6a547
The defaults of the following config values in the `CoordinatorDynamicConfig` are being updated. 1. `maxSegmentsInNodeLoadingQueue = 500` (previous = 100) 2. `replicationThrottleLimit = 500` (previous = 10) Rationale: With round-robin segment assignment now being the default assignment technique, the Coordinator can assign a large number of under-replicated/unavailable segments very quickly, without getting stuck in `RunRules` duty due to very slow strategy-based cost computations. 3. `maxSegmentsToMove = 100` (previous = 5) Rationale: A very low value (say 5) is ineffective in balancing especially if there are many segments to balance. A very large value can cause excessive moves, which has these disadvantages: - Load of moving segments competing with load of unavailable/under-replicated segments - Unnecessary network costs due to constant download and delete of segments These defaults will be revisited after #13197 is merged. |
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