jiajunwang commented on a change in pull request #525: Add waged rebalancer
monitoring mbean metrics
URL: https://github.com/apache/helix/pull/525#discussion_r337792566
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File path:
helix-core/src/main/java/org/apache/helix/controller/rebalancer/waged/WagedRebalancer.java
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@@ -412,6 +429,30 @@ private void
refreshBaseline(ResourceControllerDataProvider clusterData,
return newAssignment;
}
+ private void measureBaselineDivergenceGauge(Map<String, ResourceAssignment>
baseline,
+ Map<String, ResourceAssignment> bestPossibleAssignment) {
+ MapDifference<String, ResourceAssignment> mapDifference =
+ Maps.difference(baseline, bestPossibleAssignment);
+ Map<String, ResourceAssignment> matchedAssignment =
mapDifference.entriesInCommon();
+ Map<String, MapDifference.ValueDifference<ResourceAssignment>>
differentAssignment =
+ mapDifference.entriesDiffering();
Review comment:
This diff only shows if anything diff in the ResourceAssignment, right?
I think we need to check at the single partition level, at least.
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