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https://issues.apache.org/jira/browse/ACCUMULO-3648?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14349580#comment-14349580
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Josh Elser commented on ACCUMULO-3648:
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This would be a very nice new feature to Accumulo. We could do it on the server
at a few different levels, but I would imagine the closer we could do it to the
file-level (as opposed to a Scan or Iterator), the more efficient we could make
it.
For context from HBase when they implemented a reverse scanner: HBASE-4811
> Ability to Scan Table Keys in Reverse Order
> -------------------------------------------
>
> Key: ACCUMULO-3648
> URL: https://issues.apache.org/jira/browse/ACCUMULO-3648
> Project: Accumulo
> Issue Type: New Feature
> Components: master, tserver
> Reporter: Mike Fagan
> Labels: features, performance
>
> There are cases where you would like to scan a table in reverse key order.
> For example:
> Consider a table using an inverted timestamp key.
> This allows for very quick access to the latest records.
> But It would be helpful to quickly access earliest records without having to:
> A) scan through all the records to build a collection to reverse sort
> B) store the table again using the reverse key
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