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https://issues.apache.org/jira/browse/BEAM-8832?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17548307#comment-17548307
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Danny McCormick commented on BEAM-8832:
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This issue has been migrated to https://github.com/apache/beam/issues/19949
> Slow GCS uploads for large Java staging jars
> --------------------------------------------
>
> Key: BEAM-8832
> URL: https://issues.apache.org/jira/browse/BEAM-8832
> Project: Beam
> Issue Type: Improvement
> Components: runner-dataflow
> Affects Versions: 2.16.0
> Reporter: Alan Myrvold
> Priority: P3
> Time Spent: 1h 10m
> Remaining Estimate: 0h
>
> The default and max upload chunk size is 1M, in
> [https://github.com/apache/beam/blob/master/runners/google-cloud-dataflow-java/src/main/java/org/apache/beam/runners/dataflow/util/GcsStager.java#L96]
> This should be at least 8M to improve performance.
> 8m is the default python write chunk size
> [https://github.com/apache/beam/blob/master/sdks/python/apache_beam/io/gcp/gcsio.py#L86]
>
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