Christopher Tubbs resolved ACCUMULO-3235.
    Resolution: Duplicate

Closing as duplicate of https://github.com/apache/accumulo/issues/1327 since we 
track issues on GitHub now.

> No-chop merges
> --------------
>                 Key: ACCUMULO-3235
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-3235
>             Project: Accumulo
>          Issue Type: Improvement
>          Components: tserver
>            Reporter: Christopher Tubbs
>            Assignee: Christopher Tubbs
>            Priority: Major
> Merges currently require a special "chop" major compaction, which can be 
> slow. The idea is simple: in the metadata entries for files, we track the 
> range in use for that file with a notation.
> This additional metadata would be used to merge tablets without re-writing 
> data. Only this extra metadata would be updated (to a narrower range when 
> split, and possibly collapsed if merging adjacent ranges). If a range is 
> missing for a file, the tablet's range will be used instead. This simplifies 
> things for backwards compatibility, and means we don't need to include a 
> redundant range if the tablet isn't splitting/merging.

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