[cherry-pick](branch-2.1) Improve local shuffle strategy #40030
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apache#35454) …d data distribution This is a follow-up for apache#34122 . Currently, we use bucket shuffle local exchange to re-distribution data before a 'colocated' operator. But if no colocate/bucket-shuffle join followed, bucket-shuffle for this operator is not always suitable because the parallism will be restricted by the account of buckets
…ache#35716) Use grouping expr for hash shuffling
Now we use ``` DataGenOperator (num_instance=1) -> ResultSinkOperator(num_instance=1) ``` for loading/query tasks. This PR use a local shuffle to improve its parallelism and the plan is ``` DataGenOperator (num_instance=1) -> LocalExchangeSink (num_instance=1) -> LocalExchangeSource (num_instance=(cores / 2) -> ResultSinkOperator(num_instance=(cores / 2)) ```
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Thank you for your contribution to Apache Doris. Since 2024-03-18, the Document has been moved to doris-website. |
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run buildall |
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clang-tidy review says "All clean, LGTM! 👍" |
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Proposed changes
pick #34122 #35454 #35716 #37195