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https://issues.apache.org/jira/browse/CASSANDRA-14311?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16398201#comment-16398201
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Avi Kivity commented on CASSANDRA-14311:
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{quote}Interesting. If the page border spans to another token, you'd still want
to fill the whole page, wouldn't you? I assume so.
{quote}
You could, but you could also return a short page. In any case node-crossings
are rare, so it doesn't matter much.
{quote}Doesn't the driver already have an option to choose the next host in the
ring if it determines the paging state is beyond the original coordinator's
boundary?
{quote}
paging_state is opaque, the driver cannot interpret it.
> 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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