Return-Path: Delivered-To: apmail-hadoop-mapreduce-dev-archive@minotaur.apache.org Received: (qmail 18607 invoked from network); 12 Oct 2010 20:49:56 -0000 Received: from unknown (HELO mail.apache.org) (140.211.11.3) by 140.211.11.9 with SMTP; 12 Oct 2010 20:49:56 -0000 Received: (qmail 65371 invoked by uid 500); 12 Oct 2010 20:49:55 -0000 Delivered-To: apmail-hadoop-mapreduce-dev-archive@hadoop.apache.org Received: (qmail 65282 invoked by uid 500); 12 Oct 2010 20:49:55 -0000 Mailing-List: contact mapreduce-dev-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: mapreduce-dev@hadoop.apache.org Delivered-To: mailing list mapreduce-dev@hadoop.apache.org Received: (qmail 65152 invoked by uid 99); 12 Oct 2010 20:49:54 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 12 Oct 2010 20:49:54 +0000 X-ASF-Spam-Status: No, hits=-2000.0 required=10.0 tests=ALL_TRUSTED X-Spam-Check-By: apache.org Received: from [140.211.11.22] (HELO thor.apache.org) (140.211.11.22) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 12 Oct 2010 20:49:52 +0000 Received: from thor (localhost [127.0.0.1]) by thor.apache.org (8.13.8+Sun/8.13.8) with ESMTP id o9CKnUh2000736 for ; Tue, 12 Oct 2010 20:49:31 GMT Message-ID: <10097514.103561286916570976.JavaMail.jira@thor> Date: Tue, 12 Oct 2010 16:49:30 -0400 (EDT) From: "Ramkumar Vadali (JIRA)" To: mapreduce-dev@hadoop.apache.org Subject: [jira] Created: (MAPREDUCE-2130) Better distribution of files among DistRaid map tasks MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 X-Virus-Checked: Checked by ClamAV on apache.org Better distribution of files among DistRaid map tasks ----------------------------------------------------- Key: MAPREDUCE-2130 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2130 Project: Hadoop Map/Reduce Issue Type: Improvement Components: contrib/raid Reporter: Ramkumar Vadali Assignee: Ramkumar Vadali Currently the map tasks get a random subset of the files to be raided. But a disproportionately large file could make a map task extremely slow. We need to give approximately the same amount of data to each map task. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.