Rick Branson created CASSANDRA-6408:
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Summary: Efficient multi-partition mutations
Key: CASSANDRA-6408
URL: https://issues.apache.org/jira/browse/CASSANDRA-6408
Project: Cassandra
Issue Type: Improvement
Components: Core
Reporter: Rick Branson
At the SF Summit this year, Sylvain suggested that C* drops a very large amount
of write throughput on the floor for multi-partition mutations because they are
broken into RowMutations and executed individually. Stress tests that I've run
show 10X the throughput for 1-row x 1000-col writes versus 1000-row x 1-col
writes. We have a core high-write-skew use case which involves fan-out-on-write
against hundreds or up to thousands of keys at a time currently implemented in
Redis as it doesn't seem to suffer from the issue. Would love to be able to
move this to C* at some point.
This is likely a pretty large undertaking as it would require touching a large
portion of the write path, but I figure I'd put it here for comment and/or
debate at this point.
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