[#2506] feat(spark3): Introduce option to enable reorder multi servers for reader #2507
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…servers for reader
jerqi
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Jun 18, 2025
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zuston
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Jul 2, 2025
…servers for reader (apache#2507) ### What changes were proposed in this pull request? Introduce option to enable reorder multi servers for reader ### Why are the changes needed? If partition splitting is enabled, large partitions will be distributed across multiple shuffle servers. With the help of Spark AQE (Adaptive Query Execution), these large partitions will be processed by multiple tasks. In this case, all split tasks may sequentially read from the same set of shuffle servers, which can lead to high RPC concurrency pressure on specific servers. This PR introduces the ability to randomly reorder the underlying shuffle servers to achieve better load balancing during reading. ### Does this PR introduce _any_ user-facing change? Yes. `rss.client.read.reorderMultiServersEnable=false ` ### How was this patch tested? Needn't
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What changes were proposed in this pull request?
Introduce option to enable reorder multi servers for reader
Why are the changes needed?
If partition splitting is enabled, large partitions will be distributed across multiple shuffle servers. With the help of Spark AQE (Adaptive Query Execution), these large partitions will be processed by multiple tasks.
In this case, all split tasks may sequentially read from the same set of shuffle servers, which can lead to high RPC concurrency pressure on specific servers.
This PR introduces the ability to randomly reorder the underlying shuffle servers to achieve better load balancing during reading.
Does this PR introduce any user-facing change?
Yes.
rss.client.read.reorderMultiServersEnable=falseHow was this patch tested?
Needn't