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From "Sergey Shelukhin (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-11120) Update documentation about major compaction algorithm
Date Thu, 22 May 2014 18:05:04 GMT

    [ https://issues.apache.org/jira/browse/HBASE-11120?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14006215#comment-14006215
] 

Sergey Shelukhin commented on HBASE-11120:
------------------------------------------

This may need correcting?
{noformat}
+                    <entry />
+                    <entry />
+                    <entry>1.2F</entry>
+                  </row>
{noformat}

{noformat}
+                    <entry>hbase.hstore.compaction.max.size</entry>
+                    <entry>The maximum size for a file to be eligible for compaction,
expressed in
+                      bytes.</entry>
+                    <entry>1000</entry>
{noformat}
This is not a very good description imho...

It would be good to insert link to effect of major compaction on read results into the section
about deletes. There's description somewhere in the book already.

> Update documentation about major compaction algorithm
> -----------------------------------------------------
>
>                 Key: HBASE-11120
>                 URL: https://issues.apache.org/jira/browse/HBASE-11120
>             Project: HBase
>          Issue Type: Bug
>          Components: Compaction, documentation
>    Affects Versions: 0.98.2
>            Reporter: Misty Stanley-Jones
>            Assignee: Misty Stanley-Jones
>         Attachments: HBASE-11120.patch
>
>
> [14:20:38]  <jdcryans>	 seems that there's http://hbase.apache.org/book.html#compaction
and http://hbase.apache.org/book.html#managed.compactions
> [14:20:56]  <jdcryans>	 the latter doesn't say much, except that you should manage
them
> [14:21:44]  <jdcryans>	 the former gives a good description of the _old_ selection
algo
> [14:45:25]  <jdcryans>	 this is the new selection algo since C5 / 0.96.0: https://issues.apache.org/jira/browse/HBASE-7842



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