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Posted to github@beam.apache.org by GitBox <gi...@apache.org> on 2021/09/14 14:17:16 UTC
[GitHub] [beam] echauchot opened a new pull request #15508: [BEAM-12153] revert "implement GroupByKey with CombinePerKey with Concatenate CombineFn" because of performance issues.
echauchot opened a new pull request #15508:
URL: https://github.com/apache/beam/pull/15508
@ibzib sorry for the other PR for the same change. I need to revert my last PR that you reviewed because I discovered performance issues.
I ran a simple group by key on a 174 million lines dataset (GDELT) and the perfs are as follow:
SimpleGroupByKey on the StructuredStreaming runner before the change: 995s, no OOM
SimpleGroupByKey on the RDD runner: 457s
SimpleGroupByKey on the StructuredStreaming runner after the change: killed after some hours.
I did also tests with Beam GroupByKeyLoadTests and I reproduced OOM because spark spill to disk saturated the filesystem (see comments in the ticket).
So I'm reverting the change because perf is very bad and the OOM does not seem to be linked to the materialization
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[GitHub] [beam] echauchot merged pull request #15508: [BEAM-12153] revert "implement GroupByKey with CombinePerKey with Concatenate CombineFn" because of performance issues.
Posted by GitBox <gi...@apache.org>.
echauchot merged pull request #15508:
URL: https://github.com/apache/beam/pull/15508
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[GitHub] [beam] echauchot commented on pull request #15508: [BEAM-12153] revert "implement GroupByKey with CombinePerKey with Concatenate CombineFn" because of performance issues.
Posted by GitBox <gi...@apache.org>.
echauchot commented on pull request #15508:
URL: https://github.com/apache/beam/pull/15508#issuecomment-919944861
@ibzib thanks for the prompt review ! I'm self merging
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[GitHub] [beam] echauchot commented on pull request #15508: [BEAM-12153] revert "implement GroupByKey with CombinePerKey with Concatenate CombineFn" because of performance issues.
Posted by GitBox <gi...@apache.org>.
echauchot commented on pull request #15508:
URL: https://github.com/apache/beam/pull/15508#issuecomment-919861053
Run Java PreCommit
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[GitHub] [beam] ibzib commented on pull request #15508: [BEAM-12153] revert "implement GroupByKey with CombinePerKey with Concatenate CombineFn" because of performance issues.
Posted by GitBox <gi...@apache.org>.
ibzib commented on pull request #15508:
URL: https://github.com/apache/beam/pull/15508#issuecomment-919458061
Run Java PreCommit
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