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Posted to issues@hbase.apache.org by "Doug Meil (Commented) (JIRA)" <ji...@apache.org> on 2012/01/11 23:06:40 UTC
[jira] [Commented] (HBASE-5129) book is inconsistent regarding
disabling - major compaction
[ https://issues.apache.org/jira/browse/HBASE-5129?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13184437#comment-13184437 ]
Doug Meil commented on HBASE-5129:
----------------------------------
Thanks for the catch Mikael!
> book is inconsistent regarding disabling - major compaction
> -----------------------------------------------------------
>
> Key: HBASE-5129
> URL: https://issues.apache.org/jira/browse/HBASE-5129
> Project: HBase
> Issue Type: Bug
> Components: documentation
> Affects Versions: 0.90.1
> Reporter: Mikael Sitruk
> Assignee: Doug Meil
> Priority: Minor
> Attachments: configuration_HBASE_5129.xml.patch
>
>
> It seems that the book has some inconsistencies regarding the way to disable major compactions
> According to the book in chapter 2.6.1.1. HBase Default Configuration
> hbase.hregion.majorcompaction - The time (in miliseconds) between 'major' compactions of all HStoreFiles in a region. Default: 1 day. Set to 0 to disable automated major compactions.
> Default: 86400000 (http://hbase.apache.org/book.html#hbase_default_configurations)
> According to the book at chapter 2.8.2.8. Managed Compactions
> "A common administrative technique is to manage major compactions manually, rather than letting HBase do it. By default, HConstants.MAJOR_COMPACTION_PERIOD is one day and major compactions may kick in when you least desire it - especially on a busy system. To "turn off" automatic major compactions set the value to Long.MAX_VALUE."
> According to the code org.apache.hadoop.hbase.regionserver.Store.java, "0" is the right answer.
> (affect all documentation from 0.90.1)
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