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Posted to github@beam.apache.org by GitBox <gi...@apache.org> on 2020/08/17 17:22:02 UTC
[GitHub] [beam] lukecwik opened a new pull request #12599: [BEAM-10670] Make key coder deterministic by using upstream PCollection which uses random byte[] as the key.
lukecwik opened a new pull request #12599:
URL: https://github.com/apache/beam/pull/12599
This is necessary for some runners that require deterministic key encodings.
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[GitHub] [beam] boyuanzz commented on pull request #12599: [BEAM-10670] Make key coder deterministic by using upstream PCollection which uses random byte[] as the key.
Posted by GitBox <gi...@apache.org>.
boyuanzz commented on pull request #12599:
URL: https://github.com/apache/beam/pull/12599#issuecomment-675043194
Thanks for the explanation.
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[GitHub] [beam] lukecwik commented on pull request #12599: [BEAM-10670] Make key coder deterministic by using upstream PCollection which uses random byte[] as the key.
Posted by GitBox <gi...@apache.org>.
lukecwik commented on pull request #12599:
URL: https://github.com/apache/beam/pull/12599#issuecomment-675020858
> Thanks! Just want to make sure that we want to reshuffle on the random key rather than `InputT` right?
Yes. InputT in this case is a BoundedSource which isn't deterministically serializable but conveniently has a `byte[]` as the key which is random already and will do a fine job in redistributing the sources amongst different nodes.
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[GitHub] [beam] lukecwik commented on pull request #12599: [BEAM-10670] Make key coder deterministic by using upstream PCollection which uses random byte[] as the key.
Posted by GitBox <gi...@apache.org>.
lukecwik commented on pull request #12599:
URL: https://github.com/apache/beam/pull/12599#issuecomment-675007825
R: @boyuanzz
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[GitHub] [beam] lukecwik commented on a change in pull request #12599: [BEAM-10670] Make key coder deterministic by using upstream PCollection which uses random byte[] as the key.
Posted by GitBox <gi...@apache.org>.
lukecwik commented on a change in pull request #12599:
URL: https://github.com/apache/beam/pull/12599#discussion_r471639540
##########
File path: runners/core-construction-java/src/main/java/org/apache/beam/runners/core/construction/SplittableParDoNaiveBounded.java
##########
@@ -106,8 +106,8 @@
@Override
public PCollectionTuple expand(PCollection<KV<byte[], KV<InputT, RestrictionT>>> input) {
return input
- .apply("Drop key", Values.create())
.apply("Reshuffle", Reshuffle.of())
+ .apply("Drop key", Values.create())
Review comment:
The `input` PCollection passed in is already using random keys.
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[GitHub] [beam] boyuanzz merged pull request #12599: [BEAM-10670] Make key coder deterministic by using upstream PCollection which uses random byte[] as the key.
Posted by GitBox <gi...@apache.org>.
boyuanzz merged pull request #12599:
URL: https://github.com/apache/beam/pull/12599
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