Return-Path: Delivered-To: apmail-hadoop-core-dev-archive@www.apache.org Received: (qmail 86311 invoked from network); 22 Sep 2008 23:06:10 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.2) by minotaur.apache.org with SMTP; 22 Sep 2008 23:06:10 -0000 Received: (qmail 9711 invoked by uid 500); 22 Sep 2008 23:06:05 -0000 Delivered-To: apmail-hadoop-core-dev-archive@hadoop.apache.org Received: (qmail 9557 invoked by uid 500); 22 Sep 2008 23:06:05 -0000 Mailing-List: contact core-dev-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: core-dev@hadoop.apache.org Delivered-To: mailing list core-dev@hadoop.apache.org Received: (qmail 9546 invoked by uid 99); 22 Sep 2008 23:06:04 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 22 Sep 2008 16:06:04 -0700 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; Mon, 22 Sep 2008 23:05:13 +0000 Received: from brutus (localhost [127.0.0.1]) by brutus.apache.org (Postfix) with ESMTP id 0C9D0234C1DF for ; Mon, 22 Sep 2008 16:05:47 -0700 (PDT) Message-ID: <1945300013.1222124747037.JavaMail.jira@brutus> Date: Mon, 22 Sep 2008 16:05:47 -0700 (PDT) From: "Christian Kunz (JIRA)" To: core-dev@hadoop.apache.org Subject: [jira] Updated: (HADOOP-2771) changing the number of reduces dramatically changes the time of the map time In-Reply-To: <24642918.1201911668592.JavaMail.jira@brutus> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Virus-Checked: Checked by ClamAV on apache.org [ https://issues.apache.org/jira/browse/HADOOP-2771?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Christian Kunz updated HADOOP-2771: ----------------------------------- Fix Version/s: 0.20.0 > changing the number of reduces dramatically changes the time of the map time > ---------------------------------------------------------------------------- > > Key: HADOOP-2771 > URL: https://issues.apache.org/jira/browse/HADOOP-2771 > Project: Hadoop Core > Issue Type: Bug > Components: mapred > Affects Versions: 0.17.1 > Reporter: Owen O'Malley > Fix For: 0.20.0 > > > By changing the number of reduces, the time for an individual map changes radically. By running the same program and data with different numbers of reduces (2500, 7500, 25000) the times for each map changed radically (0:50, 1:20, 5h). -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.