je-ik commented on code in PR #24837:
URL: https://github.com/apache/beam/pull/24837#discussion_r1060644833
##########
runners/spark/src/main/java/org/apache/beam/runners/spark/SparkCommonPipelineOptions.java:
##########
@@ -84,4 +84,11 @@ static void prepareFilesToStage(SparkCommonPipelineOptions
options) {
PipelineResources.prepareFilesForStaging(options);
}
}
+
+ @Description(
+ "Enable/disable async output for operators with possibly large output (
such as splittable DoFn )")
+ @Default.Boolean(true)
+ Boolean getEnableAsyncOperatorOutput();
Review Comment:
It can bring overhead (adding threads), so it might make sense to disable
it. We could make it opt-in first, if it looks good, we can do it out-out and
then perhaps remove it.
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