jackjlli opened a new issue #8371:
URL: https://github.com/apache/pinot/issues/8371


   Currently when the table rebalance request is made, the list of instances 
will be sorted by the instance ids before the instance partition is formed. 
While when an instance with a smaller instance id got swapped out, its original 
segments will be assigned to the next available instance with a slightly larger 
instance id. In this case, all the segments will be moved around. 
   If we can retain the existing sequence of the instances and only replace the 
missing one, we can minimize the segment movement. This will be helpful for 
those large Pinot clusters to minimize the segment movement and avoid suddenly 
heavy write access to the deep storage.


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