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Date: Wed, 12 Nov 2008 16:33:44 -0800 (PST)
From: "stack (JIRA)" <jira@apache.org>
To: hbase-dev@hadoop.apache.org
Subject: [jira] Commented: (HBASE-938) major compaction period is not
 checked periodically
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    [ https://issues.apache.org/jira/browse/HBASE-938?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12647141#action_12647141 ] 

stack commented on HBASE-938:
-----------------------------

Looking at this, best for now is writing the fact that the HStoreFile is result of major compaction into the HSF info file.   When we change file formats, we'll clean all this up but this should work for now.  Then, yeah, when compacting, if only one file and if we're doing a major compaction, and if < column family TTL has passed, don't do a new major compaction.  Should save a bunch of CPU/nio.

> major compaction period is not checked periodically
> ---------------------------------------------------
>
>                 Key: HBASE-938
>                 URL: https://issues.apache.org/jira/browse/HBASE-938
>             Project: Hadoop HBase
>          Issue Type: Bug
>          Components: regionserver
>    Affects Versions: 0.18.0, 0.18.1
>         Environment: HBase 0.18 branch (should be RC1) + Hadoop 0.18 branch
>            Reporter: Rong-En Fan
>            Assignee: stack
>            Priority: Critical
>             Fix For: 0.19.0
>
>         Attachments: 938.patch, major.patch
>
>
> The major compaction period, hbase.hregion.majorcompaction, is not checked periodically. Currently, we only request major compaction when the region is open or split at which point we check whether the major compaction period is due.

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