[GitHub] [beam] kennknowles commented on a diff in pull request #25871: Update default splitting behavior to get fewer, larger, splits

[via GitHub]

kennknowles commented on code in PR #25871:
URL: https://github.com/apache/beam/pull/25871#discussion_r1139416559


##########
sdks/java/core/src/main/java/org/apache/beam/sdk/io/Read.java:
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@@ -290,12 +289,17 @@ public void splitRestriction(
       long estimatedSize = restriction.getEstimatedSizeBytes(pipelineOptions);
       // Split into pieces as close to the default desired bundle size but if 
that would cause too
       // few splits then prefer to split up to the default desired number of 
splits.
-      long splitBundleSize =
-          Math.min(
-              DEFAULT_DESIRED_BUNDLE_SIZE_BYTES,
-              Math.max(1L, estimatedSize / DEFAULT_DESIRED_NUM_SPLITS));

Review Comment:
   It is used in the unbounded source wrapper, but I have little context on 
that.



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