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Posted to github@beam.apache.org by GitBox <gi...@apache.org> on 2020/08/19 03:33:00 UTC
[GitHub] [beam] youngoli opened a new pull request #12627: [BEAM-10289] Fixing miscalculated SDF split fraction.
youngoli opened a new pull request #12627:
URL: https://github.com/apache/beam/pull/12627
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[GitHub] [beam] lostluck commented on pull request #12627: [BEAM-10289] Fixing miscalculated SDF split fraction.
Posted by GitBox <gi...@apache.org>.
lostluck commented on pull request #12627:
URL: https://github.com/apache/beam/pull/12627#issuecomment-676998085
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[GitHub] [beam] youngoli commented on pull request #12627: [BEAM-10289] Fixing miscalculated SDF split fraction.
Posted by GitBox <gi...@apache.org>.
youngoli commented on pull request #12627:
URL: https://github.com/apache/beam/pull/12627#issuecomment-676845955
I think I originally wrote it the way it was because the split helper easier to grok on its own if it returned the fraction in relation to the entire element. That is, if it returns element 2 fraction 0.8 it means split at 2.8. It's a little tougher to grok if the fraction returned is a fraction of remaining work in the element.
But looking at it again it seems better to just add that logic into the helper function anyway. The helper's only used in DataSource.Split, and it only exists to make the splitting logic easily testable, so it doesn't need to be intuitive at a glance. Anyone reading it should read would be reading it as part of DataSource.Split, and would understand the context: the fraction is getting sent to the SDF's split call so the helper just follows the kind of fraction that an SDF's TrySplit expects.
TL;DR: I moved the logic into the helper function and added some test cases to validate it.
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[GitHub] [beam] youngoli commented on pull request #12627: [BEAM-10289] Fixing miscalculated SDF split fraction.
Posted by GitBox <gi...@apache.org>.
youngoli commented on pull request #12627:
URL: https://github.com/apache/beam/pull/12627#issuecomment-675831494
R: @lostluck
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[GitHub] [beam] youngoli commented on pull request #12627: [BEAM-10289] Fixing miscalculated SDF split fraction.
Posted by GitBox <gi...@apache.org>.
youngoli commented on pull request #12627:
URL: https://github.com/apache/beam/pull/12627#issuecomment-675837875
Should be easy enough to move the fraction calculation to a helper function and add a unit test for that. I'll add that tomorrow.
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[GitHub] [beam] youngoli merged pull request #12627: [BEAM-10289] Fixing miscalculated SDF split fraction.
Posted by GitBox <gi...@apache.org>.
youngoli merged pull request #12627:
URL: https://github.com/apache/beam/pull/12627
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