Return-Path: Delivered-To: apmail-hadoop-mapreduce-issues-archive@minotaur.apache.org Received: (qmail 83496 invoked from network); 11 Mar 2010 13:45:23 -0000 Received: from unknown (HELO mail.apache.org) (140.211.11.3) by 140.211.11.9 with SMTP; 11 Mar 2010 13:45:23 -0000 Received: (qmail 36796 invoked by uid 500); 11 Mar 2010 13:44:50 -0000 Delivered-To: apmail-hadoop-mapreduce-issues-archive@hadoop.apache.org Received: (qmail 36768 invoked by uid 500); 11 Mar 2010 13:44:50 -0000 Mailing-List: contact mapreduce-issues-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: mapreduce-issues@hadoop.apache.org Delivered-To: mailing list mapreduce-issues@hadoop.apache.org Received: (qmail 36760 invoked by uid 99); 11 Mar 2010 13:44:50 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 11 Mar 2010 13:44:50 +0000 X-ASF-Spam-Status: No, hits=-2000.0 required=10.0 tests=ALL_TRUSTED X-Spam-Check-By: apache.org Received: from [140.211.11.140] (HELO brutus.apache.org) (140.211.11.140) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 11 Mar 2010 13:44:48 +0000 Received: from brutus.apache.org (localhost [127.0.0.1]) by brutus.apache.org (Postfix) with ESMTP id 44C43234C4C9 for ; Thu, 11 Mar 2010 13:44:27 +0000 (UTC) Message-ID: <1005756232.204041268315067280.JavaMail.jira@brutus.apache.org> Date: Thu, 11 Mar 2010 13:44:27 +0000 (UTC) From: "Allen Wittenauer (JIRA)" To: mapreduce-issues@hadoop.apache.org Subject: [jira] Updated: (MAPREDUCE-1184) mapred.reduce.slowstart.completed.maps is too low by default In-Reply-To: <804871030.1257393752399.JavaMail.jira@brutus> 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 [ https://issues.apache.org/jira/browse/MAPREDUCE-1184?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Allen Wittenauer updated MAPREDUCE-1184: ---------------------------------------- Affects Version/s: 0.20.1 0.20.2 > mapred.reduce.slowstart.completed.maps is too low by default > ------------------------------------------------------------ > > Key: MAPREDUCE-1184 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-1184 > Project: Hadoop Map/Reduce > Issue Type: Improvement > Affects Versions: 0.20.1, 0.20.2 > Reporter: Allen Wittenauer > > By default, this value is set to 5%. I believe for most real world situations the code isn't efficient enough to be set this low. This should be higher, probably around the 50% mark, especially given the predominance of non-FIFO schedulers. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.