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From "Doug Meil (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-5129) book is inconsistent regarding disabling - major compaction
Date Wed, 11 Jan 2012 22:06:39 GMT

     [ https://issues.apache.org/jira/browse/HBASE-5129?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Doug Meil updated HBASE-5129:

    Attachment: configuration_HBASE_5129.xml.patch
> 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 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 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
> (affect all documentation from 0.90.1)

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