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Subject [GitHub] [spark] viirya opened a new pull request #26930: [SPARK-30290][Core] Count for merged block when fetching continuous blocks in batch
Date Wed, 18 Dec 2019 01:24:19 GMT
viirya opened a new pull request #26930: [SPARK-30290][Core] Count for merged block when fetching
continuous blocks in batch
URL: https://github.com/apache/spark/pull/26930
 
 
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   We added shuffle block fetch optimization in SPARK-9853. In ShuffleBlockFetcherIterator,
we merge single blocks into batch blocks. During merging, we should count merged blocks for
`maxBlocksInFlightPerAddress`, not original single blocks.
   
   ### Why are the changes needed?
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   If `maxBlocksInFlightPerAddress` is specified, like set it to 1, it should mean one batch
block, not one original single block. Otherwise, it will conflict with batch shuffle fetch.
   
   ### Does this PR introduce any user-facing change?
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   No
   
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   Unit test.

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