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https://issues.apache.org/jira/browse/CASSANDRA-930?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matthew F. Dennis updated CASSANDRA-930:
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Attachment: CASSANDRA-930.patch
> make RR chance configurable
> ---------------------------
>
> Key: CASSANDRA-930
> URL: https://issues.apache.org/jira/browse/CASSANDRA-930
> Project: Cassandra
> Issue Type: Wish
> Components: Core
> Reporter: Jonathan Ellis
> Priority: Minor
> Fix For: 0.8
>
> Attachments: CASSANDRA-930.patch
>
>
> Read load increases linearly with replication factor. While this can be
> mitigated by simply adding machines, it would also be nice to be able to
> configure on a per-CF basis the chance of performing a read repair, so that
> particularly heavily read CFs could have a chance of (say) 10% and
> seldom-used ones could continue to repair every time, i.e., chance of 100%.
> Thus, the "hot keys get repaired before waiting for anti-entropy to kick in"
> property gets preserved, but you might see a few more reads serving old
> values than before.
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