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From "Matteo Bertozzi (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-7253) Compaction Tool
Date Sat, 01 Dec 2012 22:33:58 GMT
Matteo Bertozzi created HBASE-7253:

             Summary: Compaction Tool
                 Key: HBASE-7253
                 URL: https://issues.apache.org/jira/browse/HBASE-7253
             Project: HBase
          Issue Type: New Feature
          Components: Compaction
    Affects Versions: 0.96.0
            Reporter: Matteo Bertozzi
            Assignee: Matteo Bertozzi
            Priority: Minor
             Fix For: 0.96.0
         Attachments: HBASE-7253-v0.patch

In HBASE-5616, as part of the compaction code refactor, a CompactionTool was added.

but there are some issues:
* The tool is under test/
* mockito is required, so the "test" scope should be removed from the pom.xml, otherwise the
tool doesn't start
* The mock, used by the tool, is mocking HRegion.getRegionInfo() but some code (Store) uses
HRegion.regionInfo directly HStore.java#L2021,  HStore.java#L1389, HStore.java#L1402 and you
end up with a NPE in the tool.
* The Mocked Store uses a dummy family and the compacted files doesn't get the same family
properties specified (compression, encoding, ...)
* at the end of compaction CompactionTool.java#L155, on by default, the compaction file is
removed (note that the compacted one are already removed inside the store.compact()... and
you end up with an empty dir, if you compact everything.

I've fixed some stuff and added support to:
 * Run the compaction as a MR Job
 * Specify a Table (compact each region/family)
 * Specify a Region (compact each family)
 * Specify a Family (as before)

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