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From "Edward J. Yoon (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HAMA-4) Table pre-allocation
Date Tue, 24 Jun 2008 11:00:45 GMT

    [ https://issues.apache.org/jira/browse/HAMA-4?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12607554#action_12607554
] 

Edward J. Yoon commented on HAMA-4:
-----------------------------------

From: St.Ack

Messages between master and regionserver are sent in batches on an interval.  Shorten
the interval and tables are created more promptly.

    <name>hbase.regionserver.msginterval</name>
    <value>3000</value>
    <description>Interval between messages from the RegionServer to HMaster
    in milliseconds.  Default is 15. Set this value low if you want unit
    tests to be responsive.
    </description>

> Table pre-allocation
> --------------------
>
>                 Key: HAMA-4
>                 URL: https://issues.apache.org/jira/browse/HAMA-4
>             Project: Hama
>          Issue Type: Improvement
>          Components: architecture
>            Reporter: Edward J. Yoon
>            Assignee: Edward J. Yoon
>
> I've heard from the HBase list that creation of a table is a time-consuming
> task.
> So, should we create the table pool, allocate some tables to the it. 
> Then when a matrix object is created, 
>   - we get a table from the pool
>   - mark i"in-use". 
> Later when we clear it 
>   - return to the pool
>   - mark it "available".

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