[jira] [Updated] (CASSANDRA-6408) Efficient multi-partition mutations

["C. Scott Andreas (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-6408?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

C. Scott Andreas updated CASSANDRA-6408:
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    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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