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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-8180) [refGuide] Addition to performance.xml - use byte-array constants for CF, Cols
Date Sat, 23 Mar 2013 04:27:19 GMT

    [ https://issues.apache.org/jira/browse/HBASE-8180?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13611576#comment-13611576

Hudson commented on HBASE-8180:

Integrated in HBase-TRUNK-on-Hadoop-2.0.0 #460 (See [https://builds.apache.org/job/HBase-TRUNK-on-Hadoop-2.0.0/460/])
    hbase-8183.  performance.xml.  Fixed typo introduced in hbase-8180. (Revision 1459945)
hbase-8180.  performance.xml.  Adding entry for using byte-array constants. (Revision 1459930)

     Result = FAILURE
> [refGuide] Addition to performance.xml - use byte-array constants for CF, Cols
> ------------------------------------------------------------------------------
>                 Key: HBASE-8180
>                 URL: https://issues.apache.org/jira/browse/HBASE-8180
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Doug Meil
>            Assignee: Doug Meil
>         Attachments: performance_hbase_8180.xml.patch
> I realized that we don't have anywhere in the refGuide to use byte-array constants for
CF and Column names.  Doing this .getBytes() in a loop (especially in a MapReduce job) is
surprisingly expensive.  Adding to the performance chapter.  
> I am also going to update the other code examples in the book, but in another ticket.
> This is one of those "so obvious that it's not" kind of things.

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