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https://issues.apache.org/jira/browse/BEAM-11722?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17549158#comment-17549158
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Danny McCormick commented on BEAM-11722:
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This issue has been migrated to https://github.com/apache/beam/issues/20767
> SpannerIO.read() parallelism limited by partition count
> -------------------------------------------------------
>
> Key: BEAM-11722
> URL: https://issues.apache.org/jira/browse/BEAM-11722
> Project: Beam
> Issue Type: Bug
> Components: io-java-gcp
> Reporter: Udi Meiri
> Priority: P3
> Labels: google-cloud-spanner
>
> Setting the partition size / count is not possible:
> {code} Note: This hint is currently ignored by sessions.partitionQuery and
> sessions.partitionRead requests.{code}
> https://cloud.google.com/spanner/docs/reference/rest/v1/PartitionOptions
> Adding a Reshuffle might be the only choice, but it adds time and resource
> usage.
> cc: [~chamikara][~nielm]
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