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From "Karthik Ranganathan (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4572) Multithread compaction in regionserver
Date Tue, 11 Oct 2011 18:09:12 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4572?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13125240#comment-13125240
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Karthik Ranganathan commented on HBASE-4572:
--------------------------------------------

Compactions are already multi-threaded (I am talking about 0.92 and trunk), see CompactSplitThread.java
and look for conf settings like "hbase.regionserver.thread.compaction.large" and "hbase.regionserver.thread.compaction.small".
There are now 2 queues - a queue for large compactions and another for small ones (defined
by the amount of data it has to read in order to compact). Each can be serviced by a configurable
number of threads.

Does this work for you?
                
> Multithread compaction in regionserver
> --------------------------------------
>
>                 Key: HBASE-4572
>                 URL: https://issues.apache.org/jira/browse/HBASE-4572
>             Project: HBase
>          Issue Type: Improvement
>          Components: regionserver
>    Affects Versions: 0.90.4
>            Reporter: Aaron Guo
>             Fix For: 0.92.0
>
>
> RegionServer only have one thread doing region compaction staff.
> Could We adjust the RegionServer compation thread num and priority online. 

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