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https://issues.apache.org/jira/browse/BEAM-4049?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16435072#comment-16435072
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Alexander Dejanovski commented on BEAM-4049:
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PR sent : [https://github.com/apache/beam/pull/5112]
I had to exclude Guava's ListenableFuture from the relocation to avoid
exceptions at runtime since the DS java driver uses it in saveAsync().
> Improve write throughput of CassandraIO
> ---------------------------------------
>
> Key: BEAM-4049
> URL: https://issues.apache.org/jira/browse/BEAM-4049
> Project: Beam
> Issue Type: Improvement
> Components: io-java-cassandra
> Affects Versions: 2.4.0
> Reporter: Alexander Dejanovski
> Assignee: Jean-Baptiste Onofré
> Priority: Major
> Labels: performance
> Time Spent: 10m
> Remaining Estimate: 0h
>
> The CassandraIO currently uses the mapper to perform writes in a synchronous
> fashion.
> This implies that writes are serialized and is a very suboptimal way of
> writing to Cassandra.
> The IO should use the saveAsync() method instead of save() and should wait
> for completion each time 100 queries are in flight, in order to avoid
> overwhelming clusters.
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