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https://issues.apache.org/jira/browse/BEAM-2660?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16097447#comment-16097447
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Carl McGraw commented on BEAM-2660:
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I already have a fork with BoundedPubsubWriter working with a configurable
batch size. I need to update to include UnboundedPubsubSink as well.
> Set PubsubIO batch size using builder
> -------------------------------------
>
> Key: BEAM-2660
> URL: https://issues.apache.org/jira/browse/BEAM-2660
> Project: Beam
> Issue Type: Improvement
> Components: sdk-java-gcp
> Reporter: Carl McGraw
> Assignee: Stephen Sisk
> Labels: gcp, java, pubsub, sdk
>
> PubsubIO doesn't allow users to set the publish batch size. Instead the value
> is hard coded in both the BoundedPubsubWriter and the UnboundedPubsubSink.
> google's pub/sub is bound to a maximum of 10mb per request size. My company
> has run into problems with events that are individually smaller than 1mb, but
> when batched in the 100 or 2000 default batch sizes causes pubsub to fail to
> send the event.
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