Mailing-List: contact issues-help@hbase.apache.org; run by ezmlm
Precedence: bulk
Date: Thu, 22 Mar 2012 19:34:23 +0000 (UTC)
From: "Lars Hofhansl (Updated) (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
Message-ID: 
 <233915978.4069.1332444863371.JavaMail.tomcat@hel.zones.apache.org>
In-Reply-To: 
 <636909496.11315.1319501192244.JavaMail.tomcat@hel.zones.apache.org>
Subject: [jira] [Updated] (HBASE-4657) Improve the efficiency of our MR jobs
 with a few configurations
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit


     [ https://issues.apache.org/jira/browse/HBASE-4657?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Lars Hofhansl updated HBASE-4657:
---------------------------------

    Attachment: 4657.txt

How about something as simple as this.
Set cacheBlocks to false where appropriate, and also advises how to disable speculative execution and to set scanner caching to 100.
                
> 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.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira