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[Enhancement] adaptive enable the exchange compression #54956
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[Enhancement] adaptive enable the exchange compression #54956
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Signed-off-by: Murphy <[email protected]>
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Signed-off-by: Murphy <[email protected]>
Quality Gate passedIssues Measures |
[BE Incremental Coverage Report]❌ fail : 3 / 42 (07.14%) file detail
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[Java-Extensions Incremental Coverage Report]✅ pass : 0 / 0 (0%) |
[FE Incremental Coverage Report]✅ pass : 2 / 2 (100.00%) file detail
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Why I'm doing:
What I'm doing:
Change the default value of the variable
transmission_compression_type
fromNO_COMPRESSION
toAUTO
, which means:Rationale:
For workloads that involve transferring large amounts of data, such as shuffling, network bandwidth can become a bottleneck. In such cases, data compression can significantly improve performance.
While StarRocks already employs data encoding techniques to reduce data size, there are specific scenarios where additional compression can further optimize data transmission.
The effectiveness of compression depends on various factors, such as data type, data distribution and network utilization. Therefore, it is preferable to adopt an adaptive strategy rather than relying on a hard-coded approach. In this case, we utilize Thompson Sampling, a reward-based algorithm that dynamically adjusts decisions based on observed outcomes.
Fixes #issue
What type of PR is this:
Does this PR entail a change in behavior?
If yes, please specify the type of change:
Checklist:
Bugfix cherry-pick branch check: