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https://issues.apache.org/jira/browse/HBASE-5389?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Doug Meil updated HBASE-5389:
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Status: Patch Available (was: Open)
> [book] book.xml - minor correction of compaction algorithm (example #1)
> -----------------------------------------------------------------------
>
> Key: HBASE-5389
> URL: https://issues.apache.org/jira/browse/HBASE-5389
> Project: HBase
> Issue Type: Improvement
> Reporter: Doug Meil
> Assignee: Doug Meil
> Priority: Minor
> Attachments: book_hbase_5389.xml.patch
>
>
> Nicholas pointed this out to me. The "what" was correct in all cases for
> example #1, but two of the "whys" weren't correct:
> --------
> Slight modification to the book. In 8.7.5.5.2
> * 100 --> No, because sum(50, 23, 12, 12) * 1.0 = 97.
> * 50 --> No, because sum(23, 12, 12) * 1.0 = 47.
> * 23 --> Yes, because sum(12, 12) * 1.0 = 24.
> * 12 --> Yes, because sum(12) * 1.0 = 12.
> * 12 --> Yes, because the previous file had been included, and this is
> included because this does not exceed the the max-file limit of 5.
> [12,12] are include solely because an older/larger file is included: 23.
> The compaction algorithm itself stops after noticing that 23 should be
> included. Sum(12) * 1.0 >= 12 isn't done at all
> --------
> Correcting explanation of the last 2 files on why they were selected for
> minor compaction.
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