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From "Jimmy Xiang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-7519) Support level compaction
Date Fri, 18 Jan 2013 04:02:13 GMT

    [ https://issues.apache.org/jira/browse/HBASE-7519?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13556945#comment-13556945
] 

Jimmy Xiang commented on HBASE-7519:
------------------------------------

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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