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From "Ted Yu (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-4010) HMaster.createTable could be heavily optimized
Date Wed, 22 Jun 2011 05:05:47 GMT

     [ https://issues.apache.org/jira/browse/HBASE-4010?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ted Yu updated HBASE-4010:
--------------------------

    Attachment: 4010-v5.txt

The new HRegion.createHRegion() was mostly correct in version 2. When I rebased my patch on
TRUNK, I forgot to make necessary changes.

Version 5 is based on Stack's comment.
Now TestAdmin passes smoothly.

Running test suite.

> 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.

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