Mailing-List: contact issues-help@hbase.apache.org; run by ezmlm
Precedence: bulk
Date: Wed, 22 Jun 2011 06:51:47 +0000 (UTC)
From: "Ted Yu (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
Message-ID: 
 <168524007.27539.1308725507688.JavaMail.tomcat@hel.zones.apache.org>
In-Reply-To: 
 <2139858017.22694.1308607727475.JavaMail.tomcat@hel.zones.apache.org>
Subject: [jira] [Commented] (HBASE-4010) HMaster.createTable could be
 heavily optimized
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit


    [ https://issues.apache.org/jira/browse/HBASE-4010?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13053076#comment-13053076 ] 

Ted Yu commented on HBASE-4010:
-------------------------------

I ran test suite.

The failed tests were: TestFSTableDescriptors and TestMergeTable
TestTableMapReduce hung.
These were consistent with results of build 1980.

Committed to TRUNK.

Thanks Stack for the review, J-D for the initiative.


> HMaster.createTable could be heavily optimized
> ----------------------------------------------
>
>                 Key: HBASE-4010
>                 URL: https://issues.apache.org/jira/browse/HBASE-4010
>             Project: HBase
>          Issue Type: Improvement
>    Affects Versions: 0.90.3
>            Reporter: Jean-Daniel Cryans
>            Assignee: Ted Yu
>             Fix For: 0.92.0
>
>         Attachments: 4010-v2.txt, 4010-v3.txt, 4010-v5.txt
>
>
> Looking at the createTable method in HMaster (the one that's private), we seem to be very inefficient:
>  - We set the enabled flag for the table for every region (should be done only once).
>  - Every time we create a new region we create a new HLog and then close it (reuse one instead or see if it's really necessary).
>  - We do one RPC to .META. per region (we should batch put).
> This should provide drastic speedups even for those creating tables with just 50 regions.

--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira