AmatyaAvadhanula commented on code in PR #14584:
URL: https://github.com/apache/druid/pull/14584#discussion_r1295459400
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server/src/main/java/org/apache/druid/server/coordinator/balancer/TierSegmentBalancer.java:
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@@ -221,4 +197,39 @@ private void markUnmoved(String reason, DataSegment
segment)
runStats.add(Stats.Segments.MOVE_SKIPPED, key, 1);
}
+ /**
+ * Number of segments to move away from the decommissioning historicals of
this tier.
+ */
+ private int getNumDecommSegmentsToMove(int maxSegmentsToMove)
+ {
+ final CoordinatorDynamicConfig dynamicConfig =
params.getCoordinatorDynamicConfig();
+ if (decommissioningServers.isEmpty()) {
+ return 0;
+ } else if (dynamicConfig.isSmartSegmentLoading()) {
+ final int decommSegmentsToMove =
decommissioningServers.stream().mapToInt(
+ server -> server.getProjectedSegments().getTotalSegmentCount()
+ ).sum();
+ return Math.min(decommSegmentsToMove, maxSegmentsToMove);
+ } else {
+ int maxPercentageToMove =
dynamicConfig.getDecommissioningMaxPercentOfMaxSegmentsToMove();
+ return (int) Math.ceil(maxSegmentsToMove * (maxPercentageToMove /
100.0));
+ }
+ }
+
+ /**
+ * Number of segments to move between the active historicals of this tier.
+ */
+ private int getNumActiveSegmentsToMove(int maxActiveSegmentsToMove)
+ {
+ final CoordinatorDynamicConfig dynamicConfig =
params.getCoordinatorDynamicConfig();
+ if (activeServers.isEmpty()) {
Review Comment:
activeServers.size < 2?
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