Aggregator Stage Hash Partition

How will the performance improve by using Hash partition in Aggregator stage?

Questions by nagarjuna900   answers by nagarjuna900

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tisha24

  • Aug 4th, 2010
 

As we know,In  HASH partition, data with same key column/columns are moved to one partition for processing.aggregation is done with grouping on key column. So with Hash partion the data with the same key column are available in same partion for agggregation. and works better.  

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