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https://issues.apache.org/jira/browse/CASSANDRA-3362?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13151320#comment-13151320
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Jonathan Ellis commented on CASSANDRA-3362:
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That's a pretty big ouch for wide-row data models. If you're doing tens of
appends per second to one of those, the odds are pretty good that your merkle
trees will be out of sync at any given instant, and you end up streaming the
entire row.
> allow sub-row repair
> --------------------
>
> Key: CASSANDRA-3362
> URL: https://issues.apache.org/jira/browse/CASSANDRA-3362
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Reporter: Jonathan Ellis
> Assignee: Sylvain Lebresne
> Priority: Minor
> Labels: repair
>
> With large rows, it would be nice to not have to send an entire row if a
> small part is out of sync. Could we use the row index blocks as repair atoms
> instead of the full row?
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