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https://issues.apache.org/jira/browse/CASSANDRA-17666?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yifan Cai updated CASSANDRA-17666:
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Status: Ready to Commit (was: Review In Progress)
> Option to disable write path during streaming for CDC enabled tables
> --------------------------------------------------------------------
>
> Key: CASSANDRA-17666
> URL: https://issues.apache.org/jira/browse/CASSANDRA-17666
> Project: Cassandra
> Issue Type: Improvement
> Components: Feature/Change Data Capture
> Reporter: Yifan Cai
> Assignee: Yifan Cai
> Priority: Normal
> Time Spent: 1h 10m
> Remaining Estimate: 0h
>
> For the CDC-enabled tables, a special write path is employed during
> streaming. The mutations streamed are written into commit log first.
> There are scenarios that the commit logs can accumulate, which lead to
> failure of streaming and blocking writes.
> I'd like to propose adding a dynamic toggle to disable the special write path
> for CDC during streaming.
> Please note that the toggle is a trade-off. Because the special write path is
> there in the hope to ensure data consistency. Turning it off allows the
> streaming to pass, but in some extreme scenarios, the downstream CDC
> consumers may have holes in the stream, depending on how they consumes the
> commit logs.
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