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https://issues.apache.org/jira/browse/ACCUMULO-3235?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Christopher Tubbs resolved ACCUMULO-3235.
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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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