ddna1021 opened a new pull request, #5044:
URL: https://github.com/apache/seatunnel/pull/5044

   make data block balance before importing data #5026
   
   When partition_balance is set to true in the env,in the sink process, a 
repartition will be performed first to ensure that the size of each partition 
is roughly the same, which can avoid problems caused by data skew, but it will 
consume some extra time. The default value is false. 
   
   support spark and flink engine
   


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