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https://issues.apache.org/jira/browse/HBASE-7519?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13556945#comment-13556945
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Jimmy Xiang commented on HBASE-7519:
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All store files are already open. Their information are already in memory. A
different file structure will break lots of things since the file structure is
assumed in many places.
> Support level compaction
> ------------------------
>
> Key: HBASE-7519
> URL: https://issues.apache.org/jira/browse/HBASE-7519
> Project: HBase
> Issue Type: New Feature
> Components: Compaction
> Reporter: Jimmy Xiang
> Assignee: Jimmy Xiang
> Attachments: level-compaction.pdf, level-compactions-notes.txt
>
>
> The level compaction algorithm may help HBase for some use cases, for
> example, read heavy loads (especially, just one version is used), relative
> small key space updated frequently.
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