C. Scott Andreas updated CASSANDRA-6408:
    Component/s: Core

> 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
>            Priority: Major
> 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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