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From "Clara Xiong (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-15454) Archive store files older than max age
Date Thu, 14 Apr 2016 20:34:25 GMT

    [ https://issues.apache.org/jira/browse/HBASE-15454?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15241858#comment-15241858
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Clara Xiong commented on HBASE-15454:
-------------------------------------

For major compaction, we have a laundry list of checks which is in shouldPerformMajorCompaction
to determine whether we should do major compaction at a CompactionChecker run. You probably
want that too for this special compaction. And in SortedCompactionPolicy.selectCompaction,
we spend the effort to determin whether we can actually do major compaction: fileCompacting,
reference, file count < max file allowed. Please have the logic there than passing in candidate
files.

Or if you believe this compaction is mutually exclusive/interchangeable with major compaction.
which IS as I understand from my interpretation, you can even make it interchangeable with
major compaction with a config switch so you use use/extend the logic for triggering. 

> Archive store files older than max age
> --------------------------------------
>
>                 Key: HBASE-15454
>                 URL: https://issues.apache.org/jira/browse/HBASE-15454
>             Project: HBase
>          Issue Type: Sub-task
>          Components: Compaction
>    Affects Versions: 2.0.0, 1.3.0, 0.98.18, 1.4.0
>            Reporter: Duo Zhang
>            Assignee: Duo Zhang
>             Fix For: 2.0.0, 1.3.0, 0.98.19, 1.4.0
>
>         Attachments: HBASE-15454-v1.patch, HBASE-15454-v2.patch, HBASE-15454-v3.patch,
HBASE-15454.patch
>
>
> Sometimes the old data is rarely touched but we can not remove it. So archive it to several
big files(by year or something) and use EC to reduce the redundancy.



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