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Arun sethia commented on BEAM-4049: ----------------------------------- I can still see the problem - https://issues.apache.org/jira/browse/BEAM-5723 > 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: Alexander Dejanovski > Priority: Major > Labels: performance > Fix For: 2.5.0 > > Time Spent: 8.5h > 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. -- This message was sent by Atlassian JIRA (v7.6.3#76005)