csudharsanan commented on code in PR #2738:
URL: https://github.com/apache/helix/pull/2738#discussion_r1468060896
##########
helix-core/src/main/java/org/apache/helix/controller/rebalancer/waged/model/AssignableNode.java:
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@@ -263,13 +283,39 @@ public float
getGeneralProjectedHighestUtilization(Map<String, Integer> newUsage
* @return The highest utilization number of the node among all the capacity
category.
*/
public float getTopStateProjectedHighestUtilization(Map<String, Integer>
newUsage) {
- return getProjectedHighestUtilization(newUsage,
_remainingTopStateCapacity);
+ return getProjectedHighestUtilization(newUsage,
_remainingTopStateCapacity, null);
+ }
+
+ /**
+ * Return the most concerning capacity utilization number for evenly
partition assignment.
+ * The method dynamically calculates the projected highest utilization
number among all the
+ * capacity categories assuming the new capacity usage is added to the node.
+ *
+ * If the list of preferredScoringKeys is specified then utilization number
is computed based op the
+ * specified capacity category (keys) in the list only.
+ *
+ * For example, if the current node usage is {CPU: 0.9, MEM: 0.4, DISK:
0.6}, preferredScoringKeys: [ CPU ]
+ * Then this call shall return 0.9.
+ *
+ * This function returns projected highest utilization for only top state
partitions.
+ *
+ * @param newUsage the proposed new additional capacity usage.
+ * @param preferredScoringKeys if provided, the capacity utilization will be
calculated based on
+ * the supplied keys only, else across all
capacity categories.
+ * @return The highest utilization number of the node among all the capacity
category.
+ */
+ public float getTopStateProjectedHighestUtilization(Map<String, Integer>
newUsage, List<String> preferredScoringKeys) {
Review Comment:
Difference between this function and line 272 is this is used to return
projectedHighestUtilization for top state partitions only. Mentioned in
comments - line 300.
The function in line 307 is used by
TopStateMaxCapacityUsageInstanceConstraint and 272 by
MaxCapacityUsageInstanceConstraint.
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