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https://issues.apache.org/jira/browse/CASSANDRA-14311?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16400592#comment-16400592
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Avi Kivity commented on CASSANDRA-14311:
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{quote}this allows querying multiple token ranges in parallel and gives even
more benefits than just node hopping for the “next” page
{quote}
That changes the query semantics, not all users are prepared for parallel scan
in a single thread. For sure, it is viable.
My proposal optimizes existing use case where you have a sequential query and
want to keep it sequential.
> Allow Token-Aware drivers for range scans
> -----------------------------------------
>
> Key: CASSANDRA-14311
> URL: https://issues.apache.org/jira/browse/CASSANDRA-14311
> Project: Cassandra
> Issue Type: Improvement
> Components: Coordination
> Reporter: Avi Kivity
> Priority: Major
>
> Currently, range scans are not token aware. This means that an extra hop is
> needed for most requests. Since range scans are usually data intensive, this
> causes significant extra traffic.
>
> Token awareness could be enabled by having the coordinator return the token
> for the next (still unread) row in the response, so the driver can select a
> next coordinator that owns this row.
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