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From "Lars Hofhansl (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4657) Improve the efficiency of our MR jobs with a few configurations
Date Thu, 22 Mar 2012 19:56:23 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4657?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13235955#comment-13235955

Lars Hofhansl commented on HBASE-4657:

Hmm... Good point. Can do that as part of this issue.

Why do we even have ...mapred.RowCounter? Does it do something that ...mapreduce.RowCounter
does not? Or is it for very old versions of Hadoop that do not have mapreduce?
> Improve the efficiency of our MR jobs with a few configurations
> ---------------------------------------------------------------
>                 Key: HBASE-4657
>                 URL: https://issues.apache.org/jira/browse/HBASE-4657
>             Project: HBase
>          Issue Type: Improvement
>    Affects Versions: 0.90.4
>            Reporter: Jean-Daniel Cryans
>            Assignee: Lars Hofhansl
>             Fix For: 0.94.0
>         Attachments: 4657.txt
> This is a low hanging fruit, some of our MR jobs like RowCounter and CopyTable don't
even setCacheBlocks on the scan object which out of the box completely screws up a running
system. Another thing would be to disable speculative execution.

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