somandal commented on code in PR #15110:
URL: https://github.com/apache/pinot/pull/15110#discussion_r1984345215


##########
pinot-controller/src/main/java/org/apache/pinot/controller/helix/core/assignment/instance/InstanceAssignmentDriver.java:
##########
@@ -55,40 +55,64 @@ public InstanceAssignmentDriver(TableConfig tableConfig) {
 
   public InstancePartitions assignInstances(InstancePartitionsType 
instancePartitionsType,
       List<InstanceConfig> instanceConfigs, @Nullable InstancePartitions 
existingInstancePartitions) {
+    return assignInstances(instancePartitionsType, instanceConfigs, 
existingInstancePartitions, false);
+  }
+
+  public InstancePartitions assignInstances(InstancePartitionsType 
instancePartitionsType,
+      List<InstanceConfig> instanceConfigs, @Nullable InstancePartitions 
existingInstancePartitions,
+      boolean forceMinimizeDataMovement) {

Review Comment:
   oh, now I understand what your suggestion is @Jackie-Jiang, I think I 
misunderstood before. I think your suggestion makes sense, especially the use 
case to try out and see the difference between `true` and `false`. I know I've 
wanted to do this while testing to see when it even matters and when it doesn't 
apply. @J-HowHuang let's model this flag as: `true`, `false`, `use table 
config` - you'll need to figure out how to model this in 
`PinotTableRestletResource`
   
   (btw good catch on missing `PinotTableRestletResource`, somehow I completely 
missed this in the review - @J-HowHuang please add the flag there otherwise it 
won't show up in swagger - please test this out in swagger locally on your 
machine)



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