Jackie-Jiang commented on code in PR #17619:
URL: https://github.com/apache/pinot/pull/17619#discussion_r2766399781
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pinot-broker/src/main/java/org/apache/pinot/broker/routing/instanceselector/BaseInstanceSelector.java:
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@@ -261,16 +261,27 @@ void updateSegmentMaps(IdealState idealState,
ExternalView externalView, Set<Str
Set<Integer> pools = new HashSet<>();
for (String segment : onlineSegments) {
Map<String, String> idealStateInstanceStateMap =
idealStateAssignment.get(segment);
+ Map<String, String> sortedIdealStateMap =
convertToSortedMap(idealStateInstanceStateMap);
Long newSegmentCreationTimeMs = newSegmentCreationTimeMap.get(segment);
Map<String, String> externalViewInstanceStateMap =
externalViewAssignment.get(segment);
+
+ // Build mapping from instance to position in ideal state (ideal state
replica ID)
+ Map<String, Integer> instanceToIdealStateReplicaId = new HashMap<>();
+ int idealStateReplicaId = 0;
+ for (String instance : sortedIdealStateMap.keySet()) {
Review Comment:
It will introduce a per segment short-lived map and one extra map lookup per
segment-instance pair. Let me try if it is easy to avoid
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